R Stream Water Quality Report

8/13/2019 R Stream Water Quality Report

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Stream water quality on the island of Jersey

Dr John Langley1, Dr Mark Wyer2, Professor David Kay2, Dr Brian Shutes1,

Dr Stephen Kett1, Merle Gwyn1 and Richard Fanthome1

A report to the States of Jersey Public Services Department

J 1997



Table of Contents

Section 1 Overview and recommendations

Section 2 The ecological status of Jersey surface stream waters

Section 3 Assessment of water quality in Jersey streams



Section 1

Overview and recommendations

Dr Mark Wyer and Professor David Kay

June 1997



LS2 9JT



Table of Contents

1 Introduction page 1 1.1 Report structure page 1

2 Ecological status of Jersey streams page 1 3 Water quality in Jersey streams page 2 4 Management implications and recommendations page 3



1 Introduction

This report provides an independent assessment of water quality in fresh waterstreams on the island of Jersey for the States of Jersey Public Services Department (PSd)

Pollution Control Unit. The assessment is based on: (i) detailed biological studies of macroinvertebrate fauna and (ii) analysis of water quality data collected by the States of

Jersey Public Services Department (PSd) pollution control team.

1.1 Report structure

This report has three sections:

(i) Section 1 (i.e. the current section) provides an overview of the research

undertaken, the main conclusions. This Section also explores management

implications and recommendations,

(ii) Section 2 reports the detailed findings of research into the ecological status

of Jersey stream waters,

and

(iii) Section 3 provides a statistical analysis of water quality data available for

Jersey streams and comparisons of data with relevant criteria specified in

appropriate EC Directives for surface waters.



stream source were factors indicative of better water quality. Factors related to poorer

water quality were: impoundment, culverting, channelization, surrounding land use,

pollution sources, abstraction for water supply and tidal incursion.



3

The biological data were analysed using two statistical tools: (i) DECORANA

ordination and (ii) TWINSPAN classification. The DECORANA technique examines the

major sources of variation in the data. This analysis found the two main sources of variation in macroinvertebrate communities were related to flow rate in streams and the

distance of the sampling site from the source of the stream. This pattern matches results

from rivers in the UK mainland. TWINSPAN classification examines similarities

between macroinvertebrate communities. The analysis showed ten distinct end groups of

similar communities. The primary division of groups related to communities with a

proportion of still water species (i.e. usually associated with ponds and lakes) and those

containing species only associated with flowing waters.

The results demonstrate considerable variability in invertebrate assemblages

present within Jersey surface waters. The observed variability provides an index of

ecological health resulting from historical water quality sequences and physical

characteristics of the upstream channel. This observation suggests considerable potential

for the use of invertebrate communities in the identification and evaluation of pollution

events where sampling during the episodic passage of polluted water is often not possible.

The study of macroinvertebrate communities in Jersey streams also provides a benchmark and range of assemblages characteristic of Jersey streams against which the

significance of incremental change and/or pollution related ecological perturbations can

be assessed.

Water quality in Jersey streams



4

Some catchment outlet sites showed signs of sea water incursion (e.g. high chloride and

conductivity).

Ordination of water quality data showed main sources of variation to be related to

dissolved oxygen and nitrite concentrations and to nitrate and potassium concentrations.

The analysis also suggested that median or geometric mean water quality was not highly

variable between sites. Correlation of water quality parameters and biological status

indices showed several statistically significant relationships. These include: (i) positive

relationships with dissolved oxygen, which was also found to be an important factor in

the macroinvertebrate study and (ii) negative relationships with other parameters

indicating reductions in ecological status with increasing pollutant concentrations.

However, though relationships were statistically significant they did not explain a high

percentage of variance in ecological status suggesting that factors other than the water

quality parameters influence the ecological status of Jersey streams (e.g. channelization

and impoundment). Macroinvertebrate assemblages will also reflect historical changes in

water quality (e.g. recent pollution events). Thus, water quality parameters do not appear

to be the sole, or indeed dominant, indices of ecological status.

Management implications and recommendations

The assessment of water quality in Jersey streams suggests that water quality

problems on the island have two dimensions: (i) broad scale and (ii) local. At the broad

scale, surface water quality on the island is characterized by high nutrient concentrations,

i i l i Thi i i b h j i f bl li d



The water quality survey by the PSd Pollution Control Unit has provided useful

baseline data describing water quality through a spatially detailed examination of several

catchments on the island. Future survey work in these catchments could now be reducedto the catchment outlets, or sites close to the outlet not affected by sea water incursion.

Detailed survey could then be transferred to establish baseline spatial water quality

information for other areas of the island e.g. the west - catchments draining to St. Ouën's

Bay, St. Brélades Bay and St. Aubin's harbour.



The ecological survey of Jersey streams has provided the first systematic study of

macroinvertebrate fauna on the island. This has established an ecological "bench mark"

against which future biological monitoring can be compared to examine any spatial andtemporal patterns in the quality of Jersey stream waters.

It is recommended that the States of Jersey utilize invertebrate monitoring as a

tool in response to pollution events as well as a technique for bench marking water

quality. This approach is of value when used in association with (i.e. not replacing)

routine water quality monitoring. This is broadly the context in which both

environmental assessment tools are used within mainland UK.



Section2

Theecologicalstatusof Jerseysurfacestreamwaters

DrJohnLangley,DrBrianShutes,DrStephenKett, MerleGwynandRichardFanthome

June1997



ExecutiveSummary 1. A total of 60 stream sites within 10 catchments (Bellozanne Valley, Vaux de

Lecq, GrandVaux/Vallée des Vaux, QueensValley, Longuevillecatchment, LaValléedesMouriers,St.Peter'sValley,Rozel,WaterWorksValleyandLesPrésD'Auvergne)wereassessedforbiologicalwaterquality.

2. Macroinvertebrate communities were used to assess the sites in terms of "Biological Monitoring Working Party" Index (BMWP), "Average Score PerTaxon"(ASPT)(derivedfromBMWPandnumberof macroinvertebratefamiliespresent), "Lincoln Quality Index" (LQI) and total taxa. In total 101macroinvertebratetaxawerefoundinthisstudy, including14speciespreviouslyunrecordedfromJersey.

3. LQI (derived from BMWP and ASPT scores) categories ranged from A++("excellent water quality") to H ("very poor water quality") within thesecatchments.

4. Statisticalanalysis(ordination) indicatedthatthe twomajorsourcesof variationwithinthedatasetwererelatedtoflowrateanddistancefromthesource,thisissimilartopublishedresultsfrommainlandrivers.



Tableof Contents ExecutiveSummary 1 Introduction page1

1.1 ScopeandAimsof study page1 1.2 Background page2 1.2.1 TheIslandof Jersey page2 1.2.2 Biologicalmonitoring page2

2 Pilotstudy page5 2.1 Resultsof thepilotstudy page5

3 Method page6 3.1 Fieldmethods page6 3.2 Statisticalmethods page7

4 Results page10 4.1 TWINSPAN page10



5.3.1 Comparisonof biologicalindexscoreswith previousdata page22



5.4 Catchmentmanagementbasedonbiologicalwaterqualitypage24 5.4.1 BellozanneValleycatchment page245.4.2 LesVauxdeLecq page255.4.3 GrandVaux/ValléedesVauxcatchment page255.4.4 Queen'sValley page265.4.5 Longuevillecatchment page265.4.6 LaValléedesMouriers page265.4.7 St.Peter'sValleycatchment page275.4.8 Rozelcatchment page285.4.9 WaterWorksValleycatchment page285.4.10 LesPrésD'Auvergne page29

5.5 Discussionof majorinfluencesonwaterquality page29References page30Glossaryof taxonomicterms page32

Listof FiguresFigure1.1 Macroinvertebratesamplingsites page3



Table4.7 WaterqualityindicesfortheSt.Peter'sValleycatchment page16Table4.8 WaterqualityindicesfortheRozelcatchment page16Table4.9 WaterqualityindicesfortheWaterWorksValleycatchment page17Table4.10 WaterqualityindicesforLesPrésD'Auvergnecatchment page17Table5.1 Acomparisonof BMWPscoresfromNorman(1990)and

thisstudy page23Table5.2 Acomparisonof bioticindexscoresfromMoss(1996)and

presentstudy page23

Listof AppendicesA1 Listof macroinvertebrateFamiliesaccordingtoBMWPscoreA2 TaxacollectedinthepilotstudyA3 Jaccard'sIndexvaluesforthepilotstudyB1 TaxafromtheBellozanneValleysitesB2 TaxafromtheVauxdeLecqsites



1 IntroductionThisstudyhadthefollowingaims:(i) To provide a baseline survey of the freshwater macroinvertebrates in

Jerseystreams(ii) To examine the present relationship between the macroinvertebrate

communitiesand

water

quality

survey

data

and (iii) Toprovideabiologicalindex,specificallydesignedfor theJerseyfauna,

whichcanbeusedtomonitorfuturechangesinstreamwaterquality.1.1 Scopeof thestudy

Prior to this study, no comprehensive baseline record of Jersey's lotic (flowingwater) freshwater macroinvertebrates existed. In this study 60 sites have been sampledfromtencatchments:Rozel,Longueville,GrandsVaux/ValléedesVaux,Queen'sValley,BellozanneValley,WaterWorksValley,St.Peter'sValley,LesMouriers,VauxdeLecq,withoneadditionalsiteatLesPrésD'Auvergne(Figure1.1).



1.2 Background1.2.1 TheIslandof Jersey

Jersey is the largest and most southerly of the Channel Islands, situated 22.5kilometresfrom thewestcoastof theCherbourgpeninsulaand145kilometressouthof theEnglish mainland. Biogeographically it is locatedwithin theprovinceof Lucetania(Long, pers.comm. 1996). Geologically the base strata are dominated by four majortypes:TheVolanic Group,a thickrhyoliteandandesitevolcaniclastic sequence (GrandVaux, Grouville, Longueville (part), Vallée des Vaux (part), Rozel (part); Graniticcomplexeswithsubordinatedioriteandgabbro(Mourier,VauxdeLecq,ValléedesVaux(part), Longueville (part), Grouville (part)); The Jersey Shale Formation composed of medium-grained sandstone units with subordinate mudstones and conglomerates,metamorphosedtogreenschistfacies(St.Peter'svalley,Bellozannevalley,WaterWorksValley (part), Longueville (part)); The Rozel Conglomerate Formation, a non-

metamorphosed conglomerate with subordinate sandstone and mudstone; Rozel (part).Thesestrataareinplacesoverlainbyquaternarydepositsof sandstoneandalluvium.Jerseyhasalandareaof 119sqkilometres,aresidentpopulationof 84,000(rising

to120,000 in theSummermonths). Some55%of the landareaisusedforagriculture(Wyeret al ,1995)withassociatedproblemsforwaterabstractionincludingbiocidesandfertilizers.



operator bias and seasonal variation and is, thus, a more robust index of river waterquality.



Figure1.1



Rivers show a range of size and habitat richness, for example, most Jerseystreamshaveawidth lessthan 2mand itwould be inappropriate tocompare such siteswithlargerrivers,e.g.theThamesValley. Thisvariationinhabitatrichnesscanbetakeninto account by using the Lincoln Quality Index (LQI) (Extence et al , 1987), whichadapts theBMWP andASPT scores in termsof habitat rich rifflesites (thoseof waterwaysover2mwide)andhabitatpoor rifflesites,less than2mwide. EachBMWPandASPTcategory(seeTables1.1and1.2)isgivenarating. Theaverageof theseratingsisusedtoprovidetheLQI,viacalculationof theOverallQualityRating(OQR)(seeTables1.1to1.3).Table1.1Ratingsforhabitatrichriversitesgreaterthan2m

BMWP RatingX ASPT RatingY151+ 7 6.0+ 7121-150 6 5.5-5.9 691-120 5 5.1-5.4 561-90 4 4.6-5.0 431-60 3 3.6-4.5 315-30 2 2.6-3.5 20-14 1 0.0-2.5 1

Table1.2.Ratingsforhabitatpoorriversiteslessthan2m



Norman,1990,havebeenconductedonpartsof theJerseystreamcatchments.BothMoss(1996) and Norman (1990) used a three minute sample, so their results were broadlycomparablewiththepresentstudy.



2 PilotstudyApilotstudywasundertakenon09.06.96atthesiteRozel2(Gridref:70475272).

The Rozel catchment was chosen for this study as it was regarded as one of the leastdisturbedcatchments;themajorityof thesites(R2- R5)liewithintheboundariesof St.Catherine'sSSI. Thepurposesof thepilotstudywere:

(i) to determine whether the sampling technique was applicable to Jerseystreams, giventhesizeof thestreamsandthereducednumberof taxaexpected

compared withthemainland,duetotheareaof theisland(ii) toassessthecomparabilityof fieldtechniquesbetweendifferentworkers.Toassesstheutilityof thethreeminutesample,thespeciesfoundduringthethree

minutesamplewerecompared with time-unlimited samples takenby each fieldworker.TheBMWP/ASPTscoreswerethencontrastedandcommunitysimilarityassessedbyuseof theJaccardsIndex. The taxacollected in the pilotstudyareshown inappendixA2,andtheJaccardsindexvaluesareshowninappendixA3.2.1 Resultsof thepilotstudy

(i) TheBMWPscoresforthe3minutesampleliebetweenthemaximumand

http://slidepdf.com/reader/full/09.06.96




3 Method3.1 Fieldmethods Macroinvertebratesampling protocol

A suitable 20m stretch of stream was identified as the "sample site" by thefollowingcriteria:

(i) existingsamplingpoints(forcomparisonof data)(ii) acharacteristicstretchof aminimum20m(iii)publicaccessconsiderations

Biological techniqueThis was based on a 3 minute sample developed by the FBA and subsequentlyadopted by the U.K. Water Authorities. All microhabitats within the 20m site were

sampled by vigorous kick/sweep sampling with an FBA designed hand-net(approximately0.92squaremillimetresareamesh). Thetimeallocatedtosamplingeachof themicrohabitatswasdependentupontheirarea;if arunrepresents50%of theareaof thesite,then1.5minutesisspentonthismicrohabitat.



recorded.



Thefollowingphysicochemicalparametersweremeasured:o Streamwidthat0,10and20mo Stream depth at 0.25, 0.5 and0.75 of thestream at the pointswherewidth was

measured. Depth included depth of water to the surface of substrate, plus thedepth of thesediment.o Surfaceflow(m/s)o Substratesize;%coverof boulders,cobbles,gravelsandsedimentwithina1m2

area

o Altitude(m)o Watertemperature(˚C)o Distancefromsource(km)o Proportionof microhabitats(e.g.riffles,runs)withinthe20mstretch.o pHo Conductivity(µS)o Calcium(mg/l)o Carbonatehardness(mmol/l)o Totalhardness(mmol/l)o DissolvedOxygen(mg/l)

pH and conductivity were measured using Whatman microsensors, whilst other



ThamesWaterAuthorityusedthefollowingwaterqualityclassification:151+ Veryhighwaterquality 101-150 Highwaterquality 51-100Goodwaterquality 17-50 Moderatewaterquality 0-16 Poorwaterquality Comparability of results between different workers can largely be obtained by

strictlyadheringtothefieldmethodsnotedin3.1. Inspiteof this,thereisapossibilityof random factors and different workers influencing the final score. For this reason, theASPTvalueisusuallyamorerobustindicatorof waterquality.

The ASPT is calculated by dividing the BMWP score by the number of macroinvertebratetaxacontributingtothescore. ASPTvaluesrangebetween0and6.0+,the

higher

values

indicating

better

water

quality.

Afurtherfactorwhichcaninfluencethenumberandtypeof taxafoundisthesize

of theriver. Notonlywillthesize influencethenumberof taxa,butlargerrivers,withmeanders and backwaters, tend to be more habitat rich than brooks. Habitatheterogeneity contributes to species richness. To over come this problem, the LincolnQualityIndex(LQI)wasdevelopedbytheAnglianWaterAuthority,whichmodifiesthe



Whereas TWINSPAN describes similarity between sites, it is desirable todeterminewhichof thephysicochemicalfactorsareresponsibleforthemajorsourcesof variation within the data set. This was ascertained by the ordination techniqueDECORANA, which identifies the relative order of sites along the four major axes of variation. Therelative order of sitescan then be correlated with each of themeasuredphysicochemicalparameterstodeterminewhichfactorsaremostcloselyassociatedwiththe sourcesof variation. The relative contribution of each axis to theoverall variationwithin the data set can be determined by comparison of their respective eigenvalues.DECORANAisregardedasthemostrobustof theordinationtechniques(Gauch,1982;JacksonandSomers,1992),becauseitattemptsto'detrend'axesof variationtominimizedependencebetweensuccessiveaxes. Itisalsousefulinthatitisanon-parametrictest.Spearman Rank Correlation, another non-parametric test, was used to determineassociationsbetweenaxesof variationandphysicochemicalparameters.

Jaccard's

Index

assesses

similarity

between

two

samples,

based

on

the

presence/absence of species found. This was used to determine similarity within thethreesamplesof thepilotstudybecauseTWINSPANrequiresaminimumof 16sitesforanalysis.

Jaccard'sIndex,J,canbecalculatedby:



4 Results Individual results for all catchments are listed in Appendices B1-B10. Physico

chemicaldataarelisted inAppendixF. Thestatisticalanalysesof communitydataandwaterqualityindicesarepresentedonacatchmentbasis.

4.1 TWINSPANAnalyses indicated the existence of ten endgroups on the basis of the aquatic

macroinvertebratecommunities.Theprimarydivisionindicatedaflow-baseddichotomy(seeFigure4.1).Theright-handdivisionischaracterisedbysiteswitheitherlowfloworbeneath impoundment ponds containing many classically still-water species, e.g.Planorbis planorbis (a ramshorn snail). The left-hand division, by contrast, ischaracterised by sites with greater flow, reflected by the species present, e.g. Polycelis felina

and

Elmis

aenea.

Within

this

division,

endgroups

are

influenced

by

underlying

geology.

4.2 DECORANAThe results of analysis using DECORANA indicated two major sources of



sediment depth, all measures of stream substrate. Lower correlations ( p<0.05) werefound between dissolved oxygen, percentage cover of gravel and surface flow withDECORANA axis 1, and between percentage cover of boulders, carbonate hardness,distance from source, water depth, percentage cover of gravels and cobbles withDECORANA axis 2. Given that the DECORANA plot indicates some dependencebetween the two axes, then the duplication of parameters is not unexpected. Theadditional informationsupplied by axis two is that distance from source (and the crosscorrelationwithwaterdepth)isanimportantsourceof variation.

4.4 Waterqualityindicesbycatchment4.4.1 BellozanneValleycatchment

Thespecies listwithassociated BMWP,ASPTandLQIscoresforeach siteareincludedinAppendixB1. Table4.1 providesasummaryof thewaterqualityscorespersite.Table4.1WaterqualityindicesfortheBellozanneValleycatchment

Site 2403 2402 2404a 2404b 2406BMWP 78 82 77 74 62





Figure4.1



Figure4.2



BMWP scoresfromsiteswithin thiscatchment showedawide rangeof values,from14to61,withASPTscoresshowingasimilarlywiderange,from2.8to5.4.Thisrange

is

also

reflected

in

the

LQI

which,

as

in

the

Bellozanne

Valley

catchment,

indicated

anincreaseinwaterqualitywithdistancefromsource. BothASPTandLQIscoreswerehighest at the site furthest from thesource, 2202, a small tributary to the main stream.The highest scoring taxa numbers (15 and 14) and BMWP score (61 and 60) wereobtainedfromasemi-shadedwoodlandsite(2203)containingaboulderdamandriffles,andameadowsite (2204),with twoconfluenceswithother tributaries. Bothhadrapidflowsandwererichindifferentaquaticmicrohabitats.Inspiteof thescoresatthesesites,theLQIcategoryB,onlyindicated'goodwaterquality'.

Thelowestscores,forBMWP,ASPT,LQIandtotaltaxaalloccurredatsite2207,thesitenearestthesource.Thissitewaslocatedwithinawillowcarr,withthickorganicsiltassubstrateandisclassifiedbyLQIas'poorquality'.4.4.3 GrandVaux/ValléedesVauxcatchmentThespecieslistwithassociatedBMWP,ASPTandLQIscoresforeachsiteareincludedinAppendixB3. Table4.3providesasummaryof thewaterqualityindicespersite.Table4.3WaterqualityindicesfortheGrandVaux/ValléedesVauxcatchment

Site 2505 2506 2507 2502 2503 2504 GVSSI VdeVSSIBMWP 68 89 47 92 44 50 60 47ASPT 4.9 5.1 3.9 5.4 4.9 4.2 5.0 4.7



numberof taxareflecttheincidenceof sedimentationandpossiblyorganicenrichmentbysilagerunoff fromfieldsupstream.



4.4.5 LonguevillecatchmentThe

species

list

with

associated

BMWP,

ASPT

and

LQI

scores

for

each

site

are

includedinAppendixB5. Table4.5providesasummaryof thewaterqualityindicespersite.Table4.5.WaterqualityindicesfortheLonguevillecatchment

Site L8 L5b L5c L4 L3 L2BMWP 24 20 31 11 9 11ASPT 4.8 3.3 4.4 2.8 2.3 2.8LQI C F C G H G TotalscoringTaxa 5 6 7 4 4 4

TheBMWPscoresrangefrom9-31,withadeteriorationfrompoorwaterqualityintheuppersitestoverypoorwaterqualityinthelowercatchmentsitesL2,L3andL4,whicharechannelised. TheASPTscores,whichrangefrom4.8-2.3,showasimilartrendandpoorwaterquality. LQIscoresalsocategorizedsitesaspoor(L5b,L4,L2)orverypoor (L3). TheLQIvaluesforL8andL5c indicated 'goodwaterquality',although thenumberof scoringtaxawereonly5and7respectively.4.4.6 LaValléedesMouriersThespecieslistwithassociatedBMWP,ASPTandLQIscoresforeachsiteareincludedin Appendix B6 Table 4 6 provides a summary of the water quality indices per site



4.4.7 St.Peter'sValleycatchmentThespecieslistwithassociatedBMWP,ASPTandLQIscoresforeachsiteareincludedinAppendixB7. Table4.7providesasummaryof thewaterqualityindicespersite.Table4.7WaterqualityindicesfortheSt.Peter'sValleycatchment

Site TessonMill P13 P9 P9a P8a P7 P7a P5 P5a P4 P4a P3 P2 P1

BMWP 58 3 14 26 50 41 25 29 37 42 29 59 24 20ASPT 4.1 3.0 4.7 3.7 4.6 5.1 5.0 4.1 4.6 4.7 4.1 3.9 4.8 2.9LQI B H C D B A A C B B C C C GTotalscoringtaxa

14 1 3 7 11 8 5 7 8 9 7 15 5 7

The BMWP scores ranged from 3-59. The highest score was recorded at P3whichtraversedaprivategarden,thelowestscoreatP13situatednearthemouthof thestreamandwasinfluencedbytidalincursions,resultinginonlyPotamopyrgus jenkinsi(asaline-tolerant(euryhaline)snail)beingfoundatthissite. TheASPTscoresrangedfrompooratP1 toexcellent atP7and P7a. Theremainingsitesshowed 'good' to 'moderatewaterquality'intermsof theirLQIvalues.

4.4.8 RozelcatchmentThespecies listwithassociated BMWP,ASPTandLQIscoresforeach siteare



4.4.9 WaterWorksValleycatchmentThespecies listwithassociated BMWP, ASPTandLQIscoresforeach siteare

includedinAppendixB9. Table4.9providesasummaryof thewaterqualityindicespersite.Table4.9WaterqualityindicesfortheWaterWorksValleycatchment

Site W4 W3 W2 W1 MillBrookSSIBMWP 24 31 65 98 56ASPT 3.4 3.9 4.6 4.9 3.7LQI F D A A+ CTotalscoringtaxa 7 8 13 20 15

This catchment showed a range of water qualities (BMWP score from 24-98,ASPTrange3.4-4.9),showinglowestBMWP,andASPTsitesatthetopsitesandbottomsite,allof whichshowedlowsurfaceflow. Thehighestwaterqualityintermsof ASPT,BMWP,LQIandtotalscoringtaxawasatsiteW1,attheconfluenceof twostreams,withoneof thehighestsurfaceflows.SiteW1showedthehighestBMWPvalueinthisstudy.

4.4.10 LesPrésD'AuvergneThe species list with associated BMWP ASPT and LQI scores for each site are



5 Discussion5.1

Community

Analysis

The 60 sites investigated were placed into 10 end groups after 4 TWINSPAN

divisionsof thedataset(Figure4.1,page12). Theprimarydivisionseparatedsites:St.Peter's3- VauxdeLecq2206ontherighthand side,fromLongueville5c- ValléedesVaux SSI on the left hand side. This divides the data set into truly flowing sites(characterizedby the indicatorspeciesPolycelis felina(aflatworm)and Elmisaenea(arifflebeetle))fromwhichcontainedmacroinvertebratescharacteristicof morestill-watercommunities(characterizedbytheGenusPisidium(peamussel)). This'still-water'groupof sitesconsistedof stronglydepositingsites,withsedimentuptoadepthof 1me.g.St.Peter's 3, sites which form pools i.e. a widening of the stream, with a consequentreductioninflow(andassociateddepositionof sediment)e.g.St.Catherine'sSSI,sitesatthetopsof catchmentswheretheflowwaslow,withvariableamountsof silte.g.WaterWorks Valley 4 and 3, St. Peter's 1. The latter two sites also possessed signs of anthropogenic disturbance (turbid water, film on water surface respectively). SitesLongueville2-4arecharacterizedbybeingparticularlyspeciespoor,withaminimumof 25%of taxaconsistingof ChironomidaeorOligochaeta.St.Peter's13wasalsospeciespoor, with only Potamopyrgus jenkinsi (a euryhaline snail) found, due to the tidalinfluence on this site. Other sites included in this group possessed higher flow (e.g.Grand Vaux 2507), but these sites were below impoundment ponds, hence themacroinvertebratecommunityremainedcharacteristicof still-waterspecies.

The left hand side of the division largely grouped sites with similar geologicalcharacteristics End group 3 sites were all found on Jersey Shale whilst Group 4



are widely scattered and show extreme values, further supporting their designation asoutliers. SitesSt. Peter's2 andRozel 3 (end group 2) alsoshowextremevalues. Theremainingendgroup2site:Longueville5b,althoughnotanoutlyingvalueisnotclearlyassociatedwithanyothergroup.



More detailed inspection shows that St. Peter's 9, although grouped with thegraniticendgroup(6)byTWINSPANonthebasisof themacroinvertebratecommunity,iswidelyseparatedintermsof thetwomajorsourcesof variation,showingclearaffinityto themajorityof St. Peter'sValley sites. TWINSPAN hasdifferentiated it becauseof the presence of Gammarus pulex, rather than G. duebeni. This site also possessed fewtaxa, therefore thedissimilarity between Gammarusspecies hasbeen emphasised. Thenumberof Gammaruscaptured(1)wasmuchloweratthissitethanthosenearby(9a,8a),both of which had 50+ individuals captured. This taxon reduction, both in terms of species richness and abundance, may indicate the anthropogenic disturbance to theaquaticcommunitycausedbythewatersupplyreservoirabovethesamplesite.

Thecommunityanalysishasshownthatthesitesareprimarilydividedintothosecharacteristicof flowingwaters,andthosewithadditionalstill-waterspecies. Withintheflowing water sites, differences can be explained in terms of base geology. Outlyingvalues have been identified and confirmed by TWINSPAN and DECORANA. Themajorsourcesof variationwithinthedatasetarerelatedtoflowrate,geology(supportedbythecorrelationwithcarbonatehardness)anddistancefromsource. InanFBAstudyof riversontheUKmainland(Wrightet al.1984)themajorfactorsshowntoinfluencemacroinvertebrate communities were flow and distance from source, although a morelimitedstudythesametrendsareconsistentwiththeJerseydataset.

5.2 Comparisonof MacroinvertebrateswithpreviousrecordsSome 101 taxa from 50 families were identified in the course of this study



mainlandand thelatterconfined totheMidlandsandsouthernEngland(Savage,1989); Hydropsyche saltalai (Rozel sites 2 and 4); Rhyacophila dorsalis (Bellozanne Valley2406)regardedascommononthemainland(EdingtonandHildrew,1981); Limnephilus flavicornis (Mourier 1), a common still-water species on the mainland; Potamophylaxrotundipennis (Bellozanne 2403, but also found in St. Peter'sValley); Tinodes pallidus(Mourier6)(note:only3rdinstaridentified);Gyrinusurinator(WaterWorksValley,site1), widespread in lowlandstreams (Friday, 1988); Hydroporus tesselatus (Rozel site2,Mourier site 1), common and widespread in England (Friday, 1988); Potamonectesdepressus-elegans (St. Catherine's SSI), common and widespread in England (Friday,1988); Agabussturmii(St.Peter's3),commonandwidespreadinstill-watersintheUK(Friday, 1988); Hydraena testacea (St. Peter's 3, Water Works Valley Site 1 and MillBrook), widespread and common in southern England (Friday, 1988); Limnebiustruncatellus(WaterWorksValleysite2,Bellozanne2402),widespreadandcommononthemainland(Friday,1988).

Othernotablespeciesfoundincludedtheleech Haementeriacostata,acontinentalspecies, only recently discovered on the Britishmainland (Elliot and Mann, 1979), thebugCymatiacoleoptrata,firstrecordedfromJerseyin1988(LeQuesne,1990)andthestonefly Nemouraerratica,lastrecordedfromJerseyin1983.5.3 BiologicalWaterQualityIndices

The60streamsiteswereeachassignedthreebioticindexratings(BMWP,ASPTandLQI)usingmacroinvertebratetaxaldiversitytoclassifywaterquality. Suchdataare



froma jointtotalof fourteenassigned 'excellent'ratings(5atA+). Of theothers,four;VauxdeLecq2203and2204,Mourier6andSt.Peter's9,wereclassedas'good'andone;Mourier 8, as 'moderate' quality. These endgroups showed strong flow over shale orvolcanicgeology,exceptforSt.Peter's9. VauxdeLecq2203and2204were locatedashortdistancebelow impoundments,whilstSt.Peter's9islocatedclosetoanurbanisedareaandmaybeaffectedbyanthropogenicfactors.Mourier8isafastflowing,graniticsite,locatedbetweenabusyroad,andagarden,receivingrunoff fromtheformer. Localoccupantsreportedobservingflushesof fuelwasteandothermaterialinthewatercourse.



Endgroups 3 and 4 contained sites from St.Peter's and Rozel respectively thatobtained'good'to'excellent'scores. Onesite,St.Peter's9a,waslocatedinanurbanareaandhasaratingof 'moderate'(D).

Theloticendgroups,1and2showedtheeffectsof microhabitatscarcityonbioticindexscore,hencewerehardtoclassifye.g.Rozel3,atinytributaryof themainstream.

The more lentic (stillwater) endgroups showed consistently lower index scoresthantheloticgroups. Endgroup8containedsiteswiththehighestwaterqualityscores,thefoursitesrangingfrom'moderate'(D)to'excellent'(A). ThelatterscorewasobtainedbyLesPrésD'AuvergneSSIandMourier1. Theformersite,althougharapidly-flowingstream site for most of it's length, contained (i) an impoundment and (ii) macrophytes,providingalargenumberof microhabitatsformorelenticmacroinvertebrates. Mourier1comprisedstillwaterheld intheconcreteflumebelowareservoir,suppliedbyseepagefrom cracks in the concrete. This inflow was relatively cold (10oC), well oxygenated(6.7mg/l)andclear,supportingbothloticandlenticmacroinvertebrates,andexplainingit'shigh(A)LQIscore. Thepresenceof Gammarusduebeniatthissitemayindicatethatthe primary source of non-flying macroinvertebrates found therewas from downstreamrather than the reservoir. It is possible, however, that the more lentic species such assnails, e.g. Lymnaea peregra, and leeches, e.g. Erpobdella octoculata may haveoriginallycolonisedthesitefromthereservoirduringapast,'overflow'period.

Other sites in the endgroup were lotic in nature, but subject to other influence;St.Peter's3waslocatedwherethestreamslowedandformedapool. VauxdeLecq2205waslocatedbelowaseriesof bird-cages,usedtohousewaterfowl.



deoxygenation of the water column increases. Jersey catchments aresufficientlysmallthat this cannot occur to a significant degree, the streams not normally becomingsufficiently largetopermit thedevelopmentof conditionsinhibitory tothoseorganismswith thehighestBMWPscores. Also,streams tend tobemoreephemeralcloser to thesource.



The second trend shows anthropogenic influence decreasing as the streams'capacity to support macroinvertebrate species characteristic of high water qualityincreases. As streams grow in size, they become more valuable as a resource and arelikely to be impounded for abstraction or storage. Norman (1990) noted thatimpoundmentinfluencedthecompositionof invertebratecommunitieswithinthestreamssampledandsuggestedthatsuchspecieswouldprobablycolonisethesemorelenticsitesfromnearbyponds. Additionally,asastream'sdistancefromsource increases,sodoesit'scatchment areaand consequent area of potential pollutant input. This likelihood isincreasedwitheverytributarythat joinsthemainflow. ThisisillustratedbytheMouriercatchmentwheretwotributaries,onewithasite(M7)supportingaBMWPof 79,anotherwithasite(M8)sufficientlypollutedtoproduceaBMWPof just34.Immediatelybelowtheir confluence, another site, M6, has a BMWP of 58, probably as a result of thepolluted M8 stream entering and negatively influencing the quality of the cleaner M7stream.

The combined action of these two influences was further demonstrated inSt.Peter'scatchment.Asthisstreamflowssouth,itis joinedbyseveraltributaries. TheirLQIvaluesmaybelow,BorC,butasthestreamapproachestheValléeSt.Pierreithasgrown in size and microhabitatcomplexity andhasreached an LQI valueof A,havinghadlittleornopollutionor impoundment inflictedupon it. After thispoint, increasingurbanisationof thelowercatchmentdecreasestheLQItoC,andfinally,H. Wyeret al.(1995)emphasisedthenegativeeffectsof urbanisationuponstreamwaterquality,aswellas listing other important anthropogenic factors such as the numbers and proximity of farmstock tothewatercourseandtheeffectsof impoundment. Wyeret al.(1995)alsoexplained that several of these factorscan be significantly exacerbated by storm events



macrophyteswouldalsotendtoencouragethecolonisationof thewaterwaybyadditionalmacroinvertebratespecies.



Theconclusionsof thisstudyalsosuggestthatflowisthemostimportantfactorindeterminingthemacroinvertebratefaunasof thestreams.Table5.1Acomparisonof BMWPscoresfromNorman(1990)andthisstudyCatchment MeanBMWPscore;

thisstudy MeanBMWPscore;Norman,1990

VauxdeLecqGrandVauxMourierValleySt.Peter'sValleyRozelWaterWorksValley

47.33±7.3964.29±7.4463.13±5.3132.64±4.3339.67±10.3953.80±13.05

36.3±2.4533.1±5.0343.9±4.8735.0±6.9226.0±4.0623.8±4.21

Values=AveragecatchmentBMWPscore±standarderrorof themeanDateof Norman'ssampling:mid-lateAugust1990

TheaveragecatchmentBMWPscoresof Norman(1990)areshowninTable5.1,together with comparable data from this study. The data can only be comparedtentatively; although the time of year of the two studies are comparable, the samplingmethods differed and the sites sampled in each catchment were not the same.Additionally, it must be noted that taking averages of BMWP scores is not generallyconsidered an appropriate treatment of the data. In this case, means from the presentstudyhavebeengeneratedonlyforcomparisonwithNorman'sdata.



St.Peter'sP9aP8P5aP2

VauxdeLec 220322052206

1234

567

26503724

614941

54335237

423025

3.74.64.64.8

4.13.83.7

3.94.14.03.4

3.83.83.6

DBBC

BBD

CCCE

DDD





wasshadedandlocatedwithinapasture,whereas2404bwasadesignated 'GreenField'site,muchmoreopenandheavilygrazed byhorses,geeseandducks. Thepresenceof ducks(10individuals),mighthavebeenexpectedtoresultinhabitatdisturbanceandthuslower biological water quality. Noevidence forthiswas found, indeed, the landownerregularlydrankthestreamwater. Neverthelesstheprevalenceof larvalacanthocephalanswithintheGammaruspopulationwas65%asopposedtoameanprevalenceof 3%fromothersites.

The lowest water quality in terms of BMWP, ASPT, LQI and totalmacroinvertebrate taxa was found at site 2406, in the grounds of a well-tended privategarden.

The

LQI

(B)

still

indicated

'good

water

quality',

but

the

reduction

in

taxa

was

primarilyattributedtothesourceof thestream,apipedculvert50mupstream.5.4.2 LesVauxdeLecq

This catchment possessed a much wider range of water qualities, ranging fromLQI values of A+ ('excellent water quality') to G ('poor water quality'). The highestquality site (2202) was the lowest site in the catchment that contained water andcomprisedatinytributarytothemainstream. Thesurroundinglandusewasdominatedbywoodland,with100%shade,hencelownumbersof aquaticmacrophytes,but20%of thestreambedwascoveredwithleaf litter. Thelowwaterflowwasaresultof theverysmall channel. The lack of disturbance of the stream and the surrounding land wasprobablyanimportantfactorinmaintainingthehigherbiologicalscores.

Thethreelowestwaterqualitysites(2205,2206and2207),possessedLQIvalues



to their closeassociation with still waters. Thus, most scored low (or not at all) on theBMWP lists. The position of the site, below an impoundment pond, supporting anunmeasurably lowflowand the thirdhighestsedimentdepth inthissurveyexplainsthelenticnatureof themacroinvertebratesfound. Theleast"natural"siteinthiscatchmentwas partially channelized and located behind a car park (2505). Despite the landuse,therewasconsiderableflowandcarparkrunoff waspreventedfromenteringthestreambyaconcretewall. Thechannelizationmayaccountfor thereduction in taxarichness,butnevertheless,thetaxapresentindicatedexcellentwaterquality.



5.4.4 Queen'sValleyOnlyonesitewassampled in thiscatchment, theGrouville 'SSI'. Thissitewas

borderedbyaroad,andbyfields,oneof whichwashavingslurryappliedtoit. Thesitehadverylowflow(0.16m/s)and,upstream,highsedimentdeposition,withsubsequentlyreduced dissolved oxygen levels. Both the LQI value and number of taxa were low('moderatewaterquality',onlysixmacroinvertebratescoring taxa). Thissitereinforcestherelationshipbetweenlowdissolvedoxygen,highsiltandreducedwaterquality.5.4.5 Longuevillecatchment

Thiscatchmentshowedthelowestwaterqualityof allsitessampledinthisstudy:LQI categories ranged fromC toH('good' to 'verypoor water quality'), with only twositesscoringabove'poorwaterquality'. Itisindicativeof theoverallpoorwaterqualityfoundwithinthiscatchmentthatthehighestscoringsitewasL8;agutterbythesideof aminorroad. Thewateroriginatedfromaculvert20mabovethesamplingpointgivingagood surface water flow (0.33m/s) and there was a 80% cover on the gutter bed of Fontinalis anti-pyretica. The other 'good water quality' site was 5c, an additional sitesampledas5awasdryatthetimeof study. Thiswasamoretypicalsiteinacow-grazedmeadow,althoughtheconductivityat1150µSwasthehighestencounteredinthisstudy,implyingpossiblepollutionfromanindustrialestate20mwestof thestream.

The lowest water quality sites included Longueville 2-4, which were allcharacterizedbyartificial,trapezoidal,channelizedstreamsections,100%finesedimentcover, high conductivities (930-980µS), with calcium ions in the range 92-100 mg/l,probablyduetoleachingof ionsfromtheconcretechannel,aswellasroadrunoff inall



The only site showing significantly poorer water quality was site M8, onlypossessing'moderatewaterquality'(LQIscoreD),indeedthissitehadthelowestspeciesrichness within the catchment. Factors contributing to this included road runoff fromheavy tourist coach traffic (as well as domestic vehicles), reported periodic pollutionincidents from washing out petrol/oil tanks (according to local residents) andimpoundmentof thestreamupstreamof thesite. PoorwaterqualityfromsiteM8mayalsohavehadanegativeinfluenceonwaterqualityatsitesM6andM5.

Thefactorsandtheextenttowhichtheyreducewaterqualityareconsistentwithprevious

catchments.

Species

of

note

were

found

at

sites

M1;

Limnephilus

flavicornis, a

new record, traditionally associated with still water and M6; Tinodes pallidus, a newrecord to Jersey. This was the only catchment which contained the stonefly Nemouraerratica.5.4.7 St.Peter'sValley

ThiscatchmentpossessedthemostvariabilityinLQIcategories,fromAtoH(i.e.'excellent' to 'verypoorwaterquality'). HighestwaterqualitywasassociatedwithsitesP7andP7a,whichalthoughspeciespoor(8and5taxarespectively),hadhighASPTandLQIvalues. Site7wassituatedwithinhorse-grazedpasture(crossedbyafootpath)withamoderatedissolvedoxygen level(7.2mg/l). Site7apossessedcroppedvegetationonthewestbank,buttotheeastranparalleltotheA11,henceapossiblesourceof runoff.However,tosomeextent,thismayhavebeenmitigatedbythedensebrambleandnettlevegetation which lay between the road and the stream and could serve as a sink for



The St. Peter's catchment data gave support to previous findings of stream sizeand distance from source increasing macroinvertebrate diversity and consequent waterqualityscoresaswellasconfirmingthelikelynegativeimpactof pollutionsourcesonthemacroinvertebrate community. The St. Peter's data also suggested that sites with stillwater characteristics tended to have reduced biological index scores. In addition, itsuggests that possible tidal inflows may drastically reduce both macroinvertebratecommunitiesandwaterquality.



5.4.8 RozelcatchmentAllsitessampled in thiscatchment werepartof theRozelWoodsSSI (not just

thestepping stones/St.Catherine's 'SSI'). Thesitesgenerallyhad"excellent" to"good"waterquality. Exceptionsto thiswereR3andR5which indicated"moderate"to"verypoor"waterquality. Boththesesitesweretributariesfeedingthemainstream,withverylow flow (0.013m/sand 0.06m/s respectively). Site R5 had the narrowest stream widthrecordedinthisstudy(0.38m). TheSt.Catherine's'SSI'possessedthehighestnumberof taxa in this catchment, but only achieved 'good water quality', The stream at this sitewidens considerably, with a subsequent decrease in surface flow and increased siltdeposition

(average

0.4m).

The

site

contained

many

typically

still-water

species

e.g.

Hesperocorixa sahlbergi, Sigara limitata, many of which belonged to Familiescontaining flowing water members, hence were included in the calculation of BMWP,ASPTandLQIvalues,hencethecalculationof waterqualityremainshigh.

The Rozel catchment indicated generally good water quality (according tomacroinvertebratescores),withtheexceptionof minortributaries.5.4.9 WaterWorksValleycatchment

Thiswasanother variablewater quality catchment, withLQI categories rangingfrom A+ to F ("excellent" to "poor" water quality). The lowest water qualities wereassociated with the two sites at the top of the catchment, each the top site of the twotributarieswhichfeedthisstream. SiteW4indicated"poor"waterquality,withequallylowBMWPand ASPTscores. Thesite lay ina horse-grazedmeadow,butwasfed by



biologicalwaterqualityindexscores. ThespeciespresentatMillbrookmayalsoreflectthecontributionof marshy/impoundedsources.



5.4.10 LesPrésD'AuvergneOnly one site was sampled in this catchment, Les Prés D'Auvergne 'SSI'. This

sitepossessedhighdissolvedoxygen(8.0mg/l),moderateflowandalargelyundisturbedcatchment. Thewaterqualitywasconsideredtobe'excellent'.

5.5 Discussionof themajorfactorsinfluencingwaterqualityThe factors discussed in the preceding sections included: flow rate, sediment

coverand

dissolved

oxygen

(all

of

which

are

interrelated),

surrounding

landuse

(in

terms

of management and sources of pollution), water source e.g. impoundment ponds andculverts, stream morphology (e.g. channelisation, stream width), suspended matter andpossibletidalflow.

The most common factor influencing water quality was water impoundment, tosuch an extent that thiswas themajor division intheTWINSPAN classification. Asaresultof impoundment,manysitesdownstreamhadalowflow,highsediment(%coverof

substrate

and

depth)

with

consequently

lowered

levels

of

dissolved

oxygen.

Many

of

thespeciesfoundinthesesiteswereclassicstillwaterspecies,possiblycolonizingfromtheimpoundmentponds,whichoftendidnotcontributetothewaterqualityscores. Onthe other hand, the number of species found did not necessarily drop, indeed in somecases thesewereamongst themost species-richsitesof thecatchment. Norman(1990)also noted the effect of impoundment and emphasised the importance of low flow inloweringwaterquality.



macrophytenumbers). A supplementary source of reduced water quality suggested was tidal inflow

(P13).Saline

intrusion

of

groundwaters

in

the

south,

south

east

and

west

of

the

island,

throughoverabstractionof groundwaterresources,hasbeenidentifiedandmaysimilarlyreducewaterqualityasindexedthroughtheanalysisof macroinvertebratecommunities.



ReferencesBratton,J.H.(1983). Somerecordsof aquaticinvertebratesinJersey. Annual Bulletinof theSocieté Jersiaise23(3):369-372.Chandler, J.R. (1970). A biological approach to water quality management. WaterPollutionControl 69:415-422.Chatfield,J.E.(1975). Non-marineMolluscainJersey:arevisedlist. Annual Bulletinof theSocieté Jersiaise21(3):397-408.Chesters,R.K.,(1980). BiologicalMonitoringExerciseParty. The1978nationaltestingexercise. DoE,Water DataUnit Technical Memorandum19: 1-37. Collinson, N.H., Biggs, J., Corfield, A., Hodson, M.J., Walker, D., Whitfield, M. andWilliams,P.J.(1995). Temporaryandpermanentponds:anassessmentof theeffectsof drying out on the conservation value of aquatic macroinvertebrate communities. Biological Conservation74:125-133.Cooper, P.F., Job, G.D., Green, M.B. and Shutes, R.B.E. (1996) Reed beds and constructed wetlands for wastewater treatment. Water Research Centre Publications,Swindon.Edington, J.M. and Hildrew, A.G. (1981). A key to the caseless caddis larvae of the British Isles. BiologicalAssociationScientificPublicationNo.43.



Hammond,C.O.(1983). Thedragonfliesof Great Britainand Ireland. HarleyBooks.Hill, M.O. (1979a). DECORANA-A FORTRAN program for DetrendedCorrespondenceAnalysisandReciprocalAveraging. IthacaN.Y.CornellUniversity.



Hill,M.O.(1979b). TWINSPAN-AFORTRAN program forarrangingmultivariatedatainanordered two-waytablebyclassificationof theindividualsand attributes.IthacaN.Y.CornellUniversity.Huet, M. (1949). Apercu des relations entre le pente et les populations piscicoles deseauxcourantes. Schweiz. Z. Hydrol.11:332-351.Hynes,H.B.N.(1977). Akeytotheadultsand nymphsof Britishstoneflies(Plecoptera).(3rd ed). FreshwaterBiologicalAssociationScientificPublicationNo.17.Jackson,D.A.andSomers,K.M.(1991). Puttingthingsinorder:theupsanddownsof DetrendedCorrespondenceAnalysis. The American Naturalist 137:704-712.Le Quesne, W.J. (1947). The caddis flies of Jersey. Annual Bulletin of the Societé Jersiaise14:324-328.LeQuesne,W.J.(1953). Alistof theof theHemiptera-Heteropteraof Jersey. Annual Bulletinof theSocieté Jersiaise16(1):87-96.LeQuesne,W.J. (1990). EntomologySectionReportfor1989. Annual Bulletinof theSociete Jersiaisé 25:220-223.Macan,T.T.(1977). Akeytothe British fresh- and brackish-waterGastropods(4thed.).FreshwaterBiologicalAssociationScientificPublicationNo.13.



Glossaryof taxonomicterms Foreaseof use,nomenclaturalorderfollowsthatof tablesshowninappendices.Nomenclature

and

taxonomy

follow

Fitter

and

Manuel

(1986).

Taxa Definition/Characterisitics PhylumPLATYHELMINTHES - flatworms,flukesandtapeworms(TURBELLARIA) - free-livingflatworms. Dendrocoelumlacteum - largewhiteflatworm,commoninstillandrunningwaters Dugesia polychroa - brownflatworm,commoninmanyaquatichabitatsPolycelis felina - brownflatworm,possesstwoanteriortentacles,foundinsmallstreamsP.nigra/tenuis - smallblackflatwormcharacteristicof lowlandstreamsandlakesPhylumANNELIDA - segmentedwormsandleechesSubclassHIRUDINEA - leeches Erpobdellaoctoculata - brown/black mottled leech, common in freshwaters of all types:

devourssmallinvertebrates E.testacea - asabovebutunmottled,canwithstandmoreeutrophicconditionsthan

E.octoculataGlossiphoniacomplanata - common grey/green leech, marked with brown: found in all sorts of water

whereitfeedsonaquaticmolluscsG.heteroclita - translucent, amber-coloured leech, preys on aquatic molluscs, found

mainlyinstillwaters Helobdellastagnalis - found in still or slow waters, a translucent grey/white leech: sucks

bodyfluidsfromvariousinvertebrates Haementariacostata - introducedfromthecontinent,thisleechsucksbloodfromvertebrates.

GenerallyoccurswithmacrophytesTheromyzontessulatum - found in most waters except very fast flowing, an olive/grey,

gelatinousleech:sucksbloodfromwaterfowl



PhylumCRUSTACEAClassMALACOSTRACA- Trueshrimps,prawns,crabs,crayfish,etc.OrderIsopoda Asellusaquaticus - WaterSlater- lookslikeawoodlouse,feedsof organicdetritusinstillorslow

water A.meridianus - asabove,butsmallerandcharactersticof offshoreislandsOrderAmphipodaGammarus pulex - freshwatershrimp,foundmainlyinrunningwatersG.duebeni - brackish water shrimp that can adapt to freshwater in the absence of

competitonfromG.pulexPhylumUNIRAMIASubphylumHEXAPODA- - insectsClassPTERYGOTA - wingedinsectsOrderOdonata - dragonfliesanddamselflies Agrionvirgo - TheDemoiselleAgrion,onlybreedsinclear,fast-flowingstreamsCordulegaster boltonii - TheGolden-RingedDragonfly,characteristicof clear,well-oxygenated

streams Ischnuraelegans - The Blue-tailed Damselfly, very common damselfly, found in slower or still

waters Enallagmacyathigera - TheCommonBlueDamselfly,nymphsdwellinweedsinavarietyof

waterbodiesCoenagrion puella _ The Azure Damselfly, nymphs found in weeds in many types of

waterbody



Corixasp. - waterboatmen(immaturenymphs- unidentifiabletospecies)



OrderTrichoptera - caddisflies Diplectrona felix - caselesscaddis,usuallyfoundintheheadwaters(nearthesource)of unpolluted

rivers Hydropsychesiltalai - caseless caddis, usually the next species to be found slightly

downstreamof D.felix.Plectrocnemiaconspersa - caseless caddis, very intolerant of low oxygen & high temperature. Usually

foundintheheadwatersof smallstreamsP.geniculata - acaselesscaddis,intolerantof lowoxygenof hightemperature.Mainly

foundintheheadwatersof smallstreams Agapetus fuscipes - caddis larvae, with fixed case made from stne fragments. Found on stones in

flowingwater.Wormaldiasp. - caseless caddises, spin webs in the rapids of small streams to collect

foodparticles Rhyacophiladorsalis - predatory caseless caddis commonly found in clean, fast-flowing

streams R.septentrionis - asabove,butmorelocaliseddistribution Limnephiluslunatus - cased caddis, widespread and common in macrophyte beds of most

watertypes,butnotinfast-flowingwater L. flavicornis - cased caddis, widespread and common in macrophyte beds of most

watertypes,butnotinfast-flowingwater Halesusradiatus - a cased caddis species found in streams, rivers and lake shores, less often in

verysmallstreamsChaetopteryx villosa - aspeciesof casedcaddis,foundonweedyandstonysubstratainrivers

andstreamsPotamophylaxrotundipennis - casedcaddisfoundinstreamsandriverswithsandy/stonysubstrataSericostoma personata - cased caddis species found in trickles, streams and lakes where

sandy/stonysubstrataTinodeswaeneri - caselesscaddisfoundinstonystreamsandriversT. pallidus - anuncommoncaselesscaddisspecies in theUK,foundonly inafew

smallstreams



freshwaterhabitats



FamilySimuliidae - Blackflies;larvaearedumbell-shapedandliveinflowingwatersFamilyTabanidae - Horseflies;aquaticlarvaemayinhabitmanyhabitatsinfreshwaterFamilyTipulidae - Craneflies;somehaveaquaticlavae(usuallypredatory)thatmayinhabitvarious

typesof waterbodyFamilyPtychopteridae - PhantomCraneflies;larvaeliveinmudatmarginsof pools/ponds,etcFamilyPsychodidae - Owl Midges and Moth Flies; larvae occur in foul or detritus-choked

aquatichabitatsFamilyLonchopteridae - small,slenderflies,foundatedgesof shadystreams,larvaefoundinvegetable

matterinsimilarlocations

La Vallée

des Mouriers

M1

M4

M5

M6

M8 M7

M3



3

0 1 km

P13

St. Peter's

Valley

Les Vauxde Lecq

Waterworks

Valley

Queen'sValley

MeanHigh Water

Mean Low Water

PSd Sampling point

Site of Special Interest

Legend

Figure 1.1 Macroinvertebrate sampling sites

St. Aubin's

Bay

St. BréladesBay

St. Ouën'sBay

J

St. Helier

Bellozanne

Valley

St Peter's

Valley

Longuevillecatchment

Rozelcatchment

Grands Vaux /

Vallée des Vaux

R1

R2R5

R4

R3

L4L2

L5cL5

L8

L6

L7

L5b

L3

M8 M7

P1

P2

W4

W3

P3

22032204

2205

22062207

2504

2406

2404a/b

24032502

2505

2506

2507

2503

W2

W1

P4aP4

P5P5a

P8aP7

P9

P7a

Millbrook

Les Pres

D'Auvergne

Grouville

GrandsVaux

Vallée

desVaux

St Helier

Royal Bay

of Grouville

St. Catherine'sBay

2402

P9a

2202

60 Sites

Polycelis felina

Elmis aenea Pisidium sp.



1 2

Glossiphonia complanata

Gammarus pulex Glossiphonia complanata Gammarus pulex

Polycelis felina Gammarus duebeni

Erpobdella octoculata Agapetus fuscipes Plectrocnemia geniculata Ancylus fluviatilis

Ephemerella ignitaChironomidae Gammarus duebeniBaetis rhodani

P1L2L3

P3V2205Pres d'Au. SSIM1

L5c P2 P4 R1 P5 W1 W2 W4L8 L5b P4a R4 Tesson Mill V2202 V de Vaux SSI W3R5 R3 P5a R2 B2403 V2203 Millbrook

P7 B2402 V2204 St Cath. SSI GV2507LegendP7a B2404a M3 V2207 V2206

P8a B2404b M4 Grouville SSIB BellozanneP9a B2406 M5 P13V Vaux de Lecq L4GV2505 M6GV Grands Vaux/Vallée des Vaux

GV2506 M7L Longueville

GV2502 M8M Mourier

GV2503 M SSIP St Peter's

GV2504 P9R Rozel

Grands Vaux SSIW Waterworks Valley

Figure 4.1 TWINSPAN classification of Jersey sites

L5c

350



R3 R4P2

L8

R2

R5

L5b

R1

P9

5

6+7

3

9

8

10

D

E C O R A N A a x i s 2

0

50

100

150

200

250

300

1 3

0 50 100 150 200 250 300 350 DECORANA axis 1

Figure 4.2 DECORANA ordination of Jersey sites

Appendix A1. BMWP values for each of the scoring taxa

Taxa with a value of 10:

Siphlonuridae


Mesovelidae



Siphlonuridae

Heptageniidae

Leptophlebiidae

Ephemerellidae

Potamanthidae

EphemeridaeTaeniopterygidae

Leuctridae

Capniidae

Perlodidae

Perlidae

Chloroperlidae

Aphelocheiridae

Phryganeidae

Molannidae

Beraeidae

OdontoceridaeLeptoceridae

Goeridae

Lepidostomatidae

Brachycentridae

Sericostomatidae


Astacidae

Lestidae

Agriidae

Gomphidae

Cordulegasteridae

Aeshnidae

Corduliidae

Libellulidae

Psychomyiidae

Ecnomidae

Philopotamidae


Caenidae

Mesovelidae

Hydrometridae

Gerridae

Nepidae

Naucoridae

NotonectidaePleidae

Corixidae

Haliplidae

Hygrobiidae

Dytiscidae

Noteridae

Gyrinidae

Hydrophilidae

Hydraenidae

Clambidae

ScirtidaeDryopidae

Elmidae

Chrysomelidae

Curculionidae

Hydropsychidae

Tipulidae

Simuliidae

Planariidae

Dugesiidae

Dendrocoelidae


Baetidae

Sialidae

Piscicolidae


Valvatidae

Hydrobiidae

Bithyniidae

Lymnaeidae

Appendix A2. Results of the pilot study; Rozel 2, 9/6/96

Taxa Sample 1 Sample 2 Sample 3 3 minute sampl



Polycelis felina + +

Glossiphonia complanata + +

Erpobdella octoculata + + +

Hemiclepsis marginata +

Oligochaeta + +Ancylus fluviatilis +

Succinea sp. +

Potamopyrgus jenkinsi + + + +

Asellus aquaticus +

Asellus meridianus +

Gammarus duebeni + + + +

Cordulegaster boltoni + +

Baetis rhodani + +

Sigara scotti + +

Hydrometra stagnorum +Hydropsyche siltalai + + + +

Diplectrona felix + + +

Potamophylax rotundipennis + + + +

Sericostoma personata + + +

Agapetus fuscipes + +

Haliplus lineatocollis +

Elmis aenea +

Hydroporus tesselatum +

Chironomidae + + + +

Simuliidae +Number of taxa 8 20 14 11

BMWP 39 82 64 49

ASPT 4.88 4.82 4.92 4.9

Appendix A3 Jaccards Index values comparing macroinvertebrate richness between

the three minute and time-unlimited samples



3 minute sample

Sample 1 0.46

Sample 2 0.35

Sample 3 0.56

Appendix B1 Bellozanne Valley

Phylum/Class Family Genus/species 24 03 24 02 2404 a 2404 b 240 6

Triclada Planariidae Polycelis nigra/tenuis 2

Polycelis felina 3 2 2 1 2



Dendrocoelidae Dendrocoelum lacteum 2

Hirudinea Erpobdellidae Erpobdella testacea

Erpobdella octoculata 3 1 2 2

Glossiphoniidae Helobdella stagnalis

Glossiphonia complanata 1 3 3 2

Glossiphonia heteroclita 2Haementeria costata

Oligochaeta 1 2 1 2

Mollusca Hydrobiidae Potamopyrgus jenkinsi 3

Physidae Physa heterostropha

Lymnaeidae Lymnaea peregra

Lymnaea truncatula 1

Ancylidae Ancylus fluviatilis 2 1 1 1 2

Planorbidae Planorbis albus

Planorbis vortex

Sphaeriidae Pisidium sp.

Zonitidae Zonitoides sp. 1 1 2

Succineidae Succinea sp. 1

Crustacea Gammaridae Gammarus pulex 5 5 5 5 5Gammarus duebeni 3 1 1

Asellidae Asellus aquaticus

Asellus meridianus

Insecta Cordulegasteridae Cordulegaster boltoni 2 1

Agriidae Agrion virgo

Coenagrioniidae Enallagma cyathigerum

Ephemerellidae Ephemerella ignita

Baetidae Baetis rhodani 2 1 2 3 3

Cloeon dipterum

Cloeon simile

Notonectidae Notonecta maculata

Veliidae Velia sp. 2 1

Hydrometridae Hydrometra stagnorum 1

Nepidae Nepa cinerea 1 1 1 1

Pleidae Plea leachi

Corixidae Hesperocorixa sahlbergi

Cymatia coleoptrata

Sigara limitata

Sigara stagnalis

Sigara nigrolineata

Sigara selecta

Corixa nymphs

Hydropsychidae Diplectrona felix

Hydropsyche siltalai

Appendix B2 Vaux de LecqPhylum/Class Family Genus/species 22 02 22 03 22 04 220 5 220 6 22 07

Triclada Planariidae Polycelis nigra/tenui s 2

Polycelis felina 3 4 4

Dugesiidae Dugesia polychroa 2

Dendrocoelidae Dendrocoelum lacteum






Glossiphoniidae Helobdell a stagnalis 2

Glossiphonia complanata 3 3 2

Glossiphonia h eteroclita

Haementeria costata

Theromyzon tessulatum 1 1

Oligochaet a 1 3 3 4 3 3

Mollusca Hydrobiidae Potamopyrgus jenkinsi 5 5 5 3

Physidae Physa heterostropha 1


Lymnaea truncatula

Ancylidae Ancylus fluviatilis 2 3 4 4


Planorbis vortex

Sphaeriidae Pisidium sp. 1 1 2 4

Zonitidae Zonitoides sp.

Succineidae Succinea sp. 2 1

Crustacea Gammaridae Gammarus pulex 4 5 5 5 4

Gammarus duebeni

Asellidae Asellus aquaticus 1

Asellus meridianus 1 2 2 3

Acari 1

Insecta Cordulegasteridae Cordulegaster aff boltoni

Agrioniidae Agrion virgo

Coenagrion iidae Enallagma cyathigerum

Coenagrion puella

Nemouridae Nemoura erratica 2


Baetidae Baetis rhodani 4 3 3

Cloeon dipterum

Cloeon simile


Notonecta glauca

Veliidae Velia sp. 1

Velia caprai

Hydrometridae Hydrometra stagnorum 1 1 1

Nepidae Nepa cinereaPleidae Plea leachi


Cymatia coleoptrata

Sigara limitata

Sigara stagnalis

Sigara nigrolineata

Sigara selecta

Sigara distincta

Sigara lateralis

Sigara dorsalis

Corixa nymphs


Appendix B3a Grand Vaux/Vallée des Vaux (non 'SSI' sites)

Phylum/Class Family Genus/species 2505 2506 2507 2502 2503 2504

Triclada Planariidae Polycelis nigra/tenuis

Polycelis felina 2 1 2 2

D d lid D d l l t




Hirudinea Erpobdellidae Erpobdella testacea 1


Glossiphoniidae Helobdella stagnalis 2

Glossiphonia complanata 2 2 2 1 1

Glossiphonia heteroclitaHaementeria costata

Oligochaeta 1 2 3 3

Mollusca Hydrobiidae Potamopyrgus jenkinsi 5 5 1 1


Lymnaeidae Lymnaea peregra 2

Lymnaea truncatula

Ancylidae Ancylus fluviatilis 1 2 2

Planorbidae Planorbis albus 1

Planorbis vortex

Sphaeriidae Pisidium sp. 2

Zonitidae Zonitoides sp. 1 1 1 1 2 2

Succineidae Succinea sp. 1 1 1


Gammarus duebeni 3 5 1 1


Asellus meridianus 1

Insecta Cordulegasteridae Cordulegaster boltoni

Agriidae Agrion virgo 2


Ephemerellidae Ephemerella ignita 1 1 1

Baetidae Baetis rhodani 2 3 2

Cloeon dipterum

Cloeon simile 3




Nepidae Nepa cinerea 1 2

Pleidae Plea leachi


Cymatia coleoptrata 2

Sigara limitata 1

Sigara stagnalis 2

Sigara nigrolineata 2

Sigara selecta 1

Corixa nymphs

Hydropsychidae Diplectrona felix 1


Appendix B3b Grands Vaux 'SSI' Site

Phylum/Class Family Genus/species Grand Vaux 'SSI'


Polycelis felina




Hirudinea Erpobdell idae Erpobdel la testacea

Erpobdella octoculata

Glossiphoniidae Helobdel la stagnalis

Glossiphonia complanata 1

Glossiphonia heteroclita

Haementeria costata

Oligochaeta 1




Lymnaea truncatula

Ancylidae Ancylus fluviatilis 2


Planorbis vortex




Crustacea Gammaridae Gammarus pulex 4

Gammarus duebeni


Asellus meridianus

Insecta Cordulegasteridae Cordulegaster boltoniAgriidae Agrion virgo 1

Coenagrion iidae Enallagma cyathigeru m

Ephemerellidae Ephemerella ignita 2

Baetidae Baetis rhodani 1

Cloeon dipterum

Cloeon simile


Veliidae Velia sp.

Hydrometridae Hydrometra stagnorum

Nepidae Nepa cinerea 1

Pleidae Plea leachi


Cymatia coleoptrata

Sigara limitata

Sigara stagnalisSigara nigrolineata

Sigara selecta

Corixa nymphs


Hydropsyche siltalai 1

Psychomyiidae Tinodes waeneri

Rhyacophilid ae Rhyacophila dorsalis

Rhyacophila septentrion is 1

Rhyacophila sp.

Polycentropidae Plectrocnemia conspersa

(Glossosomatidae) Agapetus fuscipes

Limnephilidae Limnephilus lunatus

Appendix B3c Vallée des Vaux 'SSI' Site

Phylum/Class Family Genus/species Vallée des Vaux 'SSI'


Polycelis felina 2




Hirudinea Erpobdel lidae Erpobdell a testacea


Glossiphoniidae Helobdell a stagnalis



Haementeria costata

Oligochaeta 1




Lymnaea truncatula

Ancylidae Ancylus fluviatilis


Planorbis vortex



Succineidae Succinea sp.

Crustacea Gammaridae Gammarus pulex

Gammarus duebeni 3


Asellus meridianus

Insecta Cordulegasteridae Cordulegaster boltoni 1Agriidae Agrion virgo



Baetidae Baetis rhodani

Cloeon dipterum

Cloeon simile


Veliidae Velia sp.


Nepidae Nepa cinerea

Pleidae Plea leachi


Cymatia coleoptrata

Sigara limitata


Sigara selecta

Corixa nymphs




Rhyacophili dae Rhyacophila dorsalis

Rhyacophila septentrion is 2

Rhyacophila sp.

Polycentropidae Plectrocnemia conspers a



Appendix B4 Grouville 'SSI' Site

Phylum/Class Family Genus/species Grouville 'SSI'


Polycelis felina


Hi di E bd l lid E bd ll t t



Hirudinea Erpobdel lidae Erpobdell a testacea





Haementeria costata

Oligochaeta




Lymnaea truncatula



Planorbis vortex





Gammarus duebeni 1


Asellus meridianus

Insecta Cordulegasteridae Cordulegaster boltoniAgriidae Agrion virgo




Cloeon dipterum

Cloeon simile


Veliidae Velia sp.



Pleidae Plea leachi


Cymatia coleoptrata

Sigara limitata


Sigara selecta

Corixa nymphs





Rhyacophila septentrionis

Rhyacophila sp.




Appendix B5 Longueville catchment

Phylum/Class Family Genus/species L8 L5B L5C L4 L3 L2


Polycelis felina 2






Erpobdella octoculata 2

Glossiphoniidae Helobdell a stagnalis


Glossiphonia h eteroclita

Haementeria costata

Oligochaeta 1 1Mollusca Hydrobiidae Potamopyrgus jenkinsi 1 2 3 4 4 3

Physidae Physa heterostropha 3

Lymnaeidae Lymnaea peregra 1 1

Lymnaea truncatula



Planorbis vortex


Zonitidae Zonitoides sp. 1



Gammarus duebeni 1 5 5


Asellus meridianus





Cloeon dipterum

Cloeon simile


Veliidae Velia sp.



Pleidae Plea leachi


Sigara limitata

Sigara stagnalis

Sigara n igrolineataSigara selecta

Corixa nymphs






Rhyacophila sp.




Halesus radiatus

Appendix B6a La Vallée des Mouriers (not including 'SSI' site)

Phylum/Class Family Genus/species M1 M3 M4 M5 M6 M7 M8


Polycelis felina 2 2 2 3 4 4 4






Hirudinea Erpobdel lidae Erpobdel la testacea



Glossiphonia complanata 2 3 2 3


Haementeria costata

Theromyzon tessulatum

Oligochaeta 3 3 1 2 3

Mollusca Hydrobiidae Potamopyrgus jenkinsi 5 3 5 5 4 5 4


Lymnaeidae Lymnaea peregra 2 1

Lymnaea truncatula

Ancylidae Ancylus fluviatilis 1 2 1 3 2 3


Planorbis vortex



Succineidae Succinea sp. 1 1

Crustacea Gammaridae Gammarus pulex 5 5 5 5 5 2

Gammarus duebeni 5


Asellus meridianus

Insecta Cordulegasteridae Cordulegaster boltoni 2

Agriidae Agrion virgo


Coenagrion puella 1

Nemouridae Nemoura erratica 2 2


Baetidae Baetis rhodani 1 3 2 3 3

Cloeon dipterum

Cloeon simile

Notonectidae Notonecta maculata 1

Notonecta glauca 1


Velia caprai 1

Hydrometridae Hydrometra stagnorum 1Nepidae Nepa cinerea

Pleidae Plea leachi


Cymatia coleoptrata

Sigara limitata

Sigara stagnalis

Sigara nigrolineata

Sigara selecta

Sigara distincta 1

Sigara lateralis 1

Sigara dorsalis

Corixa nymphs

Appendix B6b Mourier 'SSI' site

Phylum/Class Family Genus/species Mourier 'SSI'


Polycelis felina 2










Haementeria costata

Oligochaeta 2




Lymnaea truncatula



Planorbis vortex





Gammarus duebeni


Asellus meridianus









Pleidae Plea leachi


Sigara limitata

Sigara selecta

Corixa nymphs


Hydropsyche siltalaiPsychomyiidae Tinodes waeneri



Rhyacophila sp.

(Glossosomatidae) Agapetus fuscipes 1


Halesus radiatus 1

Chaetopteryx villosa

Potamophylax rotundipennis

Sericostomatidae Sericostoma personata

Haliplidae Haliplus lineatocollis

Haliplus ruficollis group

Appendix B7 St. Peters Valley

Phylum/Class

Triclada

Family

Planariidae

Dendrocoelidae

Genus/species

Polycelis nigra/tenuis

Polycelis felina

Dendrocoelum lacteum

T. M

1

P1 3 P9

3

P9 A P8 A

2

P7

2

P7 A

3

P5 P5 A

3

P4

1

P4 A P3

1

P2

2

P 1

2




p

Glossiphoniidae

p


Helobdella stagnalis



Haementeria costata

2

2

1 1 1

1

1 2

2

3 3

1

2 3

OligochaetaMollusca Hydrobiidae

Physidae

Lymnaeidae

Ancylidae

Planorbidae

Potamopyrgus jenkinsi

Physa h eterostropha

Lymnaea peregra

Lymnaea truncatula

Ancylus fluviatilis

Planorbis albus

22

1

4 435

13

3

1 1 12

13

12

2

1

222

2

Planorbis vortex 2

Crustacea

Sphaeriidae

Zonitidae

Succineidae

Gammaridae

Pisidium sp.

Zonitoides sp.

Succinea sp.

Gammarus pulex

Gammarus duebeni

1

1

3

1

4 4 3 3 3 2 3 3

1

1 1

5

1

1


Asellus meridianus 1 1 2 1 1

2

1

Insecta CordulegasteridaeAgriidae

Coenagrioniidae

Ephemerellidae

Baetidae

Cordulegaster boltoniAgrion virgo

Enallagma cyathigerum

Ephemerella ignita

Baetis rhodani 1

2

3

1

1

2 2

2

1

1

2

2

Cloeon dipterum

Cloeon simile


Veliidae

Hydrometridae

Nepidae

Pleidae

Velia sp.

Hydrometra stagnorum

Nepa cinerea

Plea leachi

1

1

1

1

1

1

Corixidae

Hydropsychidae

Psychomyidae

Rhyacophilidae

Polycentropidae

(Glossosomatidae)

Limnephilidae

Hesperocorixa sahlbergi

Cymatia coleoptrata

Sigara limitata


Sigara selecta

Corixa nymphs

Diplectrona felix


Tinodes waeneri

Rhyacophila dorsalis


Rhyacophila sp.

Plectrocnemia conspersa

Agapetus fuscipes

Limnephilus lunatus

1

1

1

1

2

2

Appendix B8 Rozel (SSI & R4 sampled 4/9/96)

Phylum/Class Family Genus/species R5 R4 R3 R2 SSI' R1


Polycelis felina 1 + 2







Glossiphonia complanata + 1 1


Haementeria costata

Oligochaeta 1 2 1 + 2 1Mollusca Hydrobiidae Potamopyrgus jenkinsi 2 + 3



Lymnaea truncatula



Planorbis vortex


Zonitidae Zonitoides


Crustacea Gammaridae Gammarus pulex 2 1

Gammarus duebeni 2 1 + 3


Asellus meridianus 2

Insecta Cordulegasteridae Cordulegaster boltoni 1Agrioniidae Agrion virgo

Coenagrion iidae Enallagma cyathigeru m 1



Cloeon dipterum

Cloeon simile


Veliidae Velia sp. 1 1



Pleidae Plea leachi

Corixidae Hesperocorixa sahlbergi 1

Cymatia coleoptrata

Sigara limitata 3


Sigara selecta

Corixa nymphs

Hydropsychidae Diplectrona felix 1 1 +

Hydropsyche siltalai 2 + 2

Psychomyidae Tinodes waeneri



Rhyacophila sp.

(Glossosomatidae) Agapetus fuscipes 2 + 1


Halesus radiatus

Appendix B9 Water Works Valley

Phylum/Class Family Genus/species W4 W3 W2 W1 Millbrook

Triclada Planariidae Polycelis nigra/tenuis 1 2

Polycelis felina 3 1 2


Hirudinea Erpobdel lidae Erpobdel la testacea 1 2

E bd l l l 1



Erpobdel la octoculata 1

Glossiphoniidae Helobdel la stagnalis 3 2

Glossiphonia complanata 1 2


Haementeria costata 1

Oligochaeta 2 3 2 2 2Mollusca Hydrobiidae Potamopyrgus jenkinsi 2 2



Lymnaea truncatula

Ancylidae Ancylus fluviatilis 2 2 2

Planorbidae Planorbis albus 3

Planorbis vortex

Sphaeriidae Pisidium sp. 1 1




Gammarus duebeni 1

Asellidae Asellus aquaticus 4 2

Asellus meridianus 2 2 2

Insecta Cordulegasteridae Cordulegaster boltoni 1 1Agriidae Agrion virgo


Ephemerellidae Ephmerella ignita


Cloeon dipterum 1

Cloeon simile

Notonectidae Notonecta maculata 1

Veliidae Velia sp. 1 2 1 1



Pleidae Plea leachi


Cymatia coleoptrata

Sigara limitata


Sigara selecta

Corixa nymphs



Psychomyidae Tinodes waeneri 1

Rhyacophilidae Rhyacophila sp. 1

Rhyacophila dorsalis


Polycentropidae Plectrocnemia conspersa

(Glossosomatidae) Agapetus fuscipes 1

Limnephilidae Limnephilus lunatus 1

Appendix B10 Les Pres D'Auvergne 'SSI'Phylum/Class Family Genus/species Les Pres D' Augvergne

Triclada Planariidae Polycelis nigra/tenuis 2

Polycelis felina 3







p




Haementeria costata


Oligochaeta 2




Lymnaea truncatula



Planorbis vortex





Gammarus duebeni

Asellidae Asellus aquaticus 4

Asellus meridianus

Acari

Insecta Cordulegasteridae Cordulegaster aff boltoni 1

Agrioniidae Agrion virgo


Nemouridae Nemoura erratica



Cloeon dipterum

Cloeon simile


Notonecta glauca

Veliidae Velia sp.

Velia caprai



Pleidae Plea leachi


Cymatia coleoptrata

Sigara limitata

Sigara stagnalis

Sigara nigrolineata

Sigara selecta

Sigara distincta

Sigara lateralis

Sigara dorsalis 1

Corixa nymphs


Hydropsychesiltalai

Axis 1 Axis 2 Axis 3 Axis 4

Width n/s n/s n/s n/s

Water depth n/s p<0.05 n/s n/s

Silt depth p<0.01 n/s n/s n/s

% boulders n/s p<0/05 n/s n/s

% cobbles p<0 01 p<0 05 n/s n/s



ss

% cobbles p<0.01 p<0.05 n/s n/s

% gravel p<0.05 p<0.05 n/s n/s

% silt p<0.01 n/s n/s n/s

Altitude n/s n/s n/s n/sDistance

from source

n/s p<0.05 n/s n/s

pH n/s n/s n/s n/s

Conductivity n/s n/s n/s n/s

Dissolved

oxygen

p<0.05 n/s n/s n/s

Calcium ions n/s n/s n/s n/s

Carbonate hardn p<0.01 p<0.05 n/s n/s

Total hardness n/s n/s n/s n/s

% shade n/s n/s n/s n/sSurface flow p<0.05 n/s n/s n/s

Appendix D. Comparison of macroinvertebrate taxa with previous studies

PLATYHELMINTHES

Bratton

(1983)

Norman

(1990)

Moss

(1996)

This study

Dendrocoelum lacteum + +



Dugesia polychroa

Polycelis felina

P. nigra/tenuis

ANNELIDA

+

+

+

+

+

+

+


E. testacea

+

+

+ Erpobdellidae +

+


G. heteroclita

+ + Glossiphoniidae +

+

Helobdella stagnalis

Haementaria costata

+ + +

+


Naid species

Stylaria lacustris

Tubifex sp.Lumbriculus variegans

Eiseniella tetraeda

Oligochaete species

MOLLUSCA

+

+

++

+

+ Oligochaeta

+

(+)

(+)

(+)(+)

(+)

Oligochaeta

Ancylus fluviatilis

Lymnaea peregra

L. truncatulata

+

+

+ +

+

+

L. glabra

Planorbis vortex

+

Planorbiidae +

P. albus +

P. leucostoma + +Potamopyrgus jenkinsi

Physa heterostropha

Pisidium sp.

Valvatidae

+ +

+

Hydrobiidae

+

+

+

+

Succinea sp.

Zonitoides sp.

CRUSTACEA

+

+

+

+

Asellus aquaticus + + Asellidae +

Appendix D. continued

Sigara distincta +

Sigara lateralis +

Sigara dorsalis +

Corixa sp. + +



Corixa sp. + +

Trichoptera

Diplectrona felix Hydropsychidae +

Hydropsyche siltalai Hydropsyche +Plectrocnemia conspersa Polycentropidae +

P. geniculata +

Agapetus fuscipes Glossomatidae +

Wormaldia sp. +

Rhyacophila dorsalis Rhyacophila sp. Rhyacophilidae +

R. septentrionis +

Limnephilus lunatus Limnephilidae +

L. flavicornis +

Halesus radiatus +

Chaetopteryx villosa +Potamophylax rotundipennis +

Leptoceridae

Sericostoma personata Sericostomatidae +

Tinodes waeneri Psychomyidae +

T. pallidus +

Coleoptera

Haliplus lineatocollis +

H. ruficollis group +

Gyrinus urinator Gyrinus sp. +

G. substriatus +Hydroporus palustris Dytiscidae +

H. pubescens +

H. tesselatus +

Potamonectes depressus-elegans +

Agabus bipustulatus +

A. sturmii +

Ilybius fuliginosus +

Hydroglyphus pusillus +

AppendixE. Sitedescriptions



Catchment:BellozanneValley Site:2406(grid-ref.64235302) Datesampled:27.08.96Thissitelieswithinthegroundsof StGermains,formingthesoutheasterlyboundaryof theland. Tothenorth the stream is surrounded by mown grassland, to the south it is shaded by a tall hawthorn hedge,beyond which is agricultural land. The stream contains both shaded and unshaded areas, approximately 40%of thestreamiscoveredby Apiumnodiflorum. Thestreambedwasdominatedbygravelsandsilt,theunderlying geology was Late Precambrian Volcanic Group overlain by Quaternary alluvium. Theimmediatesourceof thestreamweretwopipedinflows(onemajor,theotherminor),afurtherpipeentersthestreamfromtheeastin thehawthornshadedarea,whichwasdryatthetimeof sampling.Permissionforsamplingmaybeobtainedfromtheownerof St.Germains.Catchment:BellozanneValley Site:2404A(grid-ref.64015204) Datesampled:04.09.96Thisstreamflowsthroughroughpasture(onehorseseengrazing)beforeitpassesunderaminorroadtothesouth (10 cars passed in 5 hours). The stream is mostly shaded by willow and oak. No aquaticmacrophytes were found in the stream bed. The stream bed contains approximately equal quantities of cobbles, gravels and silt. The underlying geology was Jersey Shale formation overlain by Quaternaryalluvium.

Catchment:BellozanneValley Site:2404B(grid-ref.64025204) Datesampled:27.08.96This site lies across the road, north of the above. It is a meadow grazed by geese, ducks and horses.Rabbitsandguineapigswerealsokeptatthissite. Thesiteisa'greenzone'i.e.cannotbedeveloped. Thepresent management has been undertaken for the last three years, prior to which it was ungrazed. The

Catchment:LesVauxdeLecq Site:2201(grid-ref 583552) Datesampled:22.08.96Note:Streamculvertedatthispoint.











p

Catchment:LesVauxdeLecq Site:2201a(grid-ref 58405519) Datesampled:22.08.96Note:StreamtotallydryNB:Sites2200,2201and2201aexaminedbeforeandafter22.08.96andwerefoundtobedry,evenafterseveralperiodsof heavyrain.Catchment:LesVauxdeLecq Site:2202(grid-ref 58445502) Datesampled:22.08.96A meandering woodland trickle(1l/8.4 seconds) that joined themain Vaux deLecq streamviaaculvertapproximately 40mdownstream. Thestreamwassituated inadeeplycutchannel,surroundedbymaturesycamore, Acer pseudoplatanus/sweet chestnut,Castaneasativa,woodlandthatslopeddown topastureafew metres downstream of the bottom of the site. Trees provided 100% shade, whilst the banksidevegetation is mainly covered in ivy, Hederahelixwith afew other herbs and ferns interspersed. Gravel(50%)andboulders(30%)formthemajorityof thestreambed,basedongraniteoverlainbyalluviumandhead.Theupperportionof thesitehadcopiousleaf-litterwithinthestream.Catchment:LesVauxdeLecq Site:2203(grid-ref 58735490) Datesampled:22.08.96Thestream, at thispoint,was crossed by awell-trodden path,resulting in much of thesurrounding areacomprising of trodden earth/mud. The surrounding area waswoodland composed of sycamore, oak andalder trees. These imparted, together with somefringing vegetation,about60%shade. The stream wascrossedbyseveralfelled treetrunksandatonepointbyaboulderdamwhich interrupted thewholeflowwidth. The stream channel is widened at this point, resulting in shallow flow and the presence of bothiffl d f t U d l i l it l i b ll i d h d d th t

underlying geology was granite overlain by alluvium and head. The substrate was mainly composed of gravel(70%).











Catchment:LesVauxdeLecq Site:2205(grid-ref 59705460) Datesampled:23.08.96Situatedinafieldinthevillageof LeRondin,flowingwest,attimeof samplingthelevelof thestreamwaswellabovenormalbecauseof heavyrainthedayandnightbefore. Thefieldwithinwhichthesamplesitewaslocatedisrough,marshpasturewithawiderangeof plantspecies(22noted).Tothenorth,beyondthefieldedgeliesthemainroad. Totheeastthestreamissuedfromaculvertthroughwhichitflowsunderaminorroad. Tothewestthestreamflowedintoanimpoundedpondwhichcontained(accordingtolocals)trout. To thesouth lay morefieldsand aportion of thevillage. Thestream wasshaded only by mixedoverhanging vegetation, some patches of bracken,Pteridium, bistort, Polygonum amphibium and fools'watercress Apium nodiflorum (total 40%). Aquatic vegetation was largely composed of Apium (30%),Polygonumandrecently-submergedgrassesandcovered70%of thestreambed. Thestreambeditself wasdifficultto characterise becauseof coloured water,butappeared to consist largely of gravel(80%). Theflowwasrapidandturbulent.Catchment:LesVauxdeLecq Site:2206(grid-ref 60105480) Datesampled:23.08.96The stream at this site formed the end of a detached garden (i.e. unconnected to the house to which itbelonged)inthevillageof LesMarais. Inspiteof housetohouseenquiries,theownersof thisgardenwereneitheridentifiednorlocatedandsamplingwascarriedoutintheirabsence. Atthispointitformed(attimeof sampling)astagnantwaterbodywhichwasveryturbid. Itrunseast/westandisborderedtothesouthbyasteepbankthatis toppedbyseveralsycamore treesandformstheedgeof afield.To thenorthlies thegarden which, due to raised water levels, grades into waterlogged grass and marsh before becoming thestreamproper. Totheeastthestreamborderedothergardens,tothewestitwasculvertedunderawalland

d Sh d 95% th lt f th b kt d th ll ld t i th d it lf

Catchment:LesGrandsVaux Site:2502(grid-ref.66625140) Datesampled:06.09.96









This site was sampled below a 'V notch' weir, beyond the junction with the dry channel. The stream isborderedbywoodlandonbothsides,tothewestof thewoodlandliesagraveltrackapprox.7mwide. Thesite is heavily shaded (dominated by alder and sycamore), to the extent that there were no aquaticmacrophytes within the channel and 15% of the bank area is covered by leaf litter. The stream bed islargely composed of gravel and cobbles, reflecting the considerable surface flow (0.33m/s). Theunderlying geology was LatePrecambrian VolcanicGroup. One7.5cmdiameter pipeemerges from theeastbank,withoutanydischargeatthetimeof sampling. ThestreamlieswithinlandownedbytheJerseyNew Water Works Company (JNWWC) and access can be gained by telephoning Terry Humphries(34351).Catchment:LesGrandsVaux Site:2503(grid-ref.66615209) Datesampled:06.09.96Thestreamlieswithinagrazedmeadow,witharoadpassingnortheastof thesite. Thesiteisunshaded,andhasadensemacrophytecoverdominatedby Apiumnodiflorum(80%cover). Thestreambedislargelycomposed of gravels with cobbles, with a surface flow of 0.2m/s. The underlying geology is LatePrecambrianVolcanicGroup. Themeadow liesbelowroad level,and there isadrainat thebaseof theroadbridgewhichwouldpermitrunoff.Catchment:GrandsVaux SiteGV(Grid-Ref 616518) Datesampled:01.08.96Thestreamatthissiteflowssouththroughgrazedandmanagedpasturewithawetlandaboveandaminorroad crossing the stream to thesouth. The in-streamvegetation provides shade (90%) and macrophytesincludeOeananthecrosata (Hemlockwaterdropwort),Stachys palustris(Marshwoundwort10%). Thestreamisdominatedbysilt(50-90%)withpebbles(0-40%)andcobbles(0-10%). ItisclassifiedasaSite

f S i tifi I t t (SSI) Thi it i d t i t t th h l f JNWWC b h l

Catchment:ValléedesVaux Site:2506(grid-ref.65045106) Datesampled:03.09.96









ThissiteisbytheHarvestBarnPublicHouse. Totheeastof thestreamliesthepubcarpark,tothewestliesaroad. Thesouthernendof thesampledstretchpassesunderaroad.Thestreamisslightlyshadedbyahazel(40%cover)andcontainsabout20%coverof aquaticmacrophytes. Thesubstrateconsistsof cobbles(30%),gravels(35%)andsilt(35%),thesurfaceflowis0.33m/s. Thestreamischannelizedbyawallof stoneblocks. TheunderlyinggeologywasLatePrecambrianVolcanicGroup. Runoff fromthecarparkislimitedbya7.5cmhighkerbandfromtheroadbya1mhighgrassybank. However,onepipeemergesintothestreambythebridge,whichwouldcarryroadrunoff.Catchment:ValléedesVaux Site:2507(grid-ref.65395195) Datesampled:03.09.96ThissiteisagrazedmeadowoppositethehouseBeauDesert. Thesouthernendof thestreampassesundera road, the edge of the stream is poached. The stream was unshaded, but with minimal aquaticmacrophytes;dominatedby Myosotisscorpionoides. Thestreambedwasdominatedbysilt(98% cover)which was deeper than 1m. Upstream (north) of thesampling stretch were two reservoirs. Theoutflowfromtheeasternmostreservoirfeedsintothestreamandisamajorcontributiontoitsflow. Itispossiblethat thisstreamfloodsperiodically as Juncus effusus is common away from the immediate stream bank.TheunderlyinggeologywasLatePrecambrianVolcanicGroupoverlainbyQuaternaryalluvium.Catchment:ValléedesVauxSiteVV(Grid-Ref 652506)Datesampled:01.08.96Thissite is located between 2506 and 2507. Itis bordered on itswestsideby asteep slopeof NationalTrustWoodlandandtotheeastbycroppedgrasslandandbanks. ThestreamisshadedbyOak(Quercus),Ash( Acer) and Hazel (Coryllusavellana)onthewestbankwithUrticadioica(nettle)50%beingpresenton theeastbank. The stream bed is composed of cobbles (50%),gravel(0-50%) and silt(0-30%). The

t b bl i d ff Th it i l ifi d SSI

Catchment:Longueville SiteL3(Grid-Ref 67014304) Datesampled:30.07.96









Thistrapezoidalshapedchannelisedsectionof theBaudretteBrookpassesthroughcowgrazed pasturetothe east. The confluence of a tributary (Site L4) is situated to the south below the section sampled. Thestream is crossed by a footbridge and access road to the farm below the site. A road with high trafficdensityislocated10mtothewestof theconfluence.Thesubstrateissilt(100%)andtherewasdensecoverof Cladophora (75%) in the stream bed. Polyganum persicora (Redshank) and Scirpus maritimus(Seaclub-rush) were also present. The farmer was abstracting water to a tanker below the bridge for hiscows.Hewasveryconcernedaboutthewaterqualityandshouldperhapsbeadvisedtoabstractabovetheconfluenceinfuture.PermissionforaccesstoL3maybeobtainedfromthefarmer.Catchment:Longueville SiteL4(Grid-Ref 67014805) Datesampled:30.07.96A tributaryof theBaudretteBrook,thistrapezoidalshapedchannelisedsection islocatedbelowaculvertwithabusyroadimmediatelytothewestandsurroundinglandfeaturesasdescribedforL3.Thetributaryisunshadedand Agrostisstolonifera(6%), Rorippanasturtiun-aquaticum(10%)andCladophora(3%)arepresent in the stream. The substrate is silt (100%). The underlying geology is Pleistocene/recent alluvium/peat.Therewasnoflowat thetimeof samplingsuggesting that intermittentrunoff isthemajordischargecomponent.PermissionforsamplingmaybeobtainedfromthefarmerasforL2andL3.Catchment:Longueville SiteL5C(Grid-Ref 67434818) Datesampled:07.08.96ThissitewasselectedasanalternativetoL5Awhichwasdryatthetimeof sampling.Thesampledsectionof the stream is located in cow grazed pasture and joins the Baudrette Brook 50m to the south. Anindustrialestateislocated20mtothewest. ThemacrophytespresentincludePolyganum persicora(25%).The banks and substrate (silt 100%) showed signs of churning by cows. The conductivity recorded(1150 ) i hi h d b i fl d b di h f th i d t i l t t P i i f li

Catchment:ValléedesMouriers Site:M3(grid-ref 60705620) Datesampled:19.08.96Thi i h l ( 37 ) f h i l d i L V ll d M i Th fl









This is the lowest (approx 37m) of the sites sampled in La Vallee des Mouriers. The stream flowsapproximatelywest to eastdownadeep "V-shaped"channel,heavilyovergrownwith,and100%shadedby, mixed terrestrial macrophytes (dominated by Bracken,Pteridium aquilinum, and Hemlock,Coniummaculatum)).Pteridium and other heathland vegetation (heaths and gorse) dominate the valley slopes toeithersideof thechannel,absentonlywhereadirttrack(whichcrossesthestreamafewmetresabovethetopof thesamplingsite)runsalongthenorthside.Theunderlyinggeologyof thesamplesitewasgranitic,overlainbyhead,thechannelbedlargelycomprisingof gravelsandcobbles,althoughsome(20%)of thebed was covered by fine, silty deposits. Aquaticvegetationcomprisedof abedof Fool'sWater Cress, Apiumnodiflorum,(20%bedcover).Flowwithin the channel was very low, although the nature and arrangement of the substrata suggest greaterflowsinthepast.Notes:Itispossibletodrivetothissite,althoughnoteasy. Other, terrestrialspeciesworthyof note- severalGreenLizardsandmanybutterflies:Painted Lady,Red Admiral,SmallTortoiseshell,CommonSkippersandJerseyTigerMoths. Catchment:ValléedesMouriers Site:M1(grid-ref 60805617) Datesampled:20.08.96ThissiteislocatedwithinthespillwayfromareservoirformedbydammingtheMourierStream.Assuch,theunderlying substrate is composed of concrete,cracks in which allow water seepage into the channel,thussupplying thestream. Theconcrete sides are almostverticaland reach almost2m above thewater'ssurface.Attimeof samplingthey,andthebridge,shadedapproximately 20-25%of thechannel.Thesiteissurroundedonbothsidesbymowngrassland,in turnborderedbyheath-coveredslopesto the

th d d d l t th th Th i t ti f th i i it t d 20 t d

Catchment:ValléedesMouriers Site:M4(grid-ref 61005592) Datesampled:20.08.96D l k ithi "V h d" d d ( i l A d l t ) ll fl i t th







Deeplysunkwithina"V-shaped"wooded(mainlysycamore, Acer pseudoplatanus)valley,flowingto thenorth-westof thetrackand joined5metresbelowthetopof thesitebyasmallspring/trickle. ThestreamflowsfromapproximatelySEtoNWandislargely(95%)shadedbythetreesthatlinethebanks.Aquaticvegetation is absent whilst bankside vegetation (besides the trees) is dominated by a mix of bracken,Pteridiumaquilinumandivy, Hederahelix,togetherwithseveralotherspeciesincludingthehart'stonguefern, Aspleniumscolopendrium.Atthebottomof thesitethestreamflowsintoamassof brambles, Rubus fruticosus,and bracken,Pteridiumaquilinum,andastandof deadumbellifers.Theunderlyinggeologyisgranite, overlain by head, the stream substrate being dominated by cobbles and gravel, although severalboulders(granite)arepresent. Flowspeedsarerapid,upto0.4m/sec.Catchment:ValléedesMouriers Site:M5(grid-ref 61185588) Datesampled:20.08.96BorderedontheSWsidebyaroadandontheNEbyroughgrasslandcontaining(20mfromthestream)aderelict farm building. The stream flows north-west, alongside the road above and for the whole of thesampledlength,beforecontinuingthroughgrassland,separatedfromtheroad.Thestreamchannelisdeeply(1m+)sunkbelowthesurfaceof thesurroundinglandand,beingamaximumof 1.15metreswide,mustbeconsideredas100%shadedformostof theday.Railingsrunbetweenthestreamchannelandtheroad.The bankside vegetation is dominated for the last few metres of the NE bank by an ivy Hedera helix,hedge,butfor mostof it's length by grass (45%),nettles(20%) and avariety of herbs(mixed herbage

30%).Fool'swatercress, Apiumnodiflorum ,formsbedscovering40%of thestreambed.Theunderlyinggeologyof thesiteisgranitewithheadoverlay,whilstthestreambedismainlycomposedof bouldersandcobbles.Waterflowisrapid,althoughslowedconsiderablybythebedsof Apiumsituated4metresfromthebottomof thesite,anirontube(1.3m)lieswithinthestream.N t

Catchment:ValléedesMouriers Site:M7(grid-ref 61355557) Datesampled:21.08.96Here the stream flows north to south along the edge and to the east of the road The opposite side of the







Herethestreamflowsnorthtosouthalongtheedge,andto theeast,of theroad.Theoppositesideof theroad is occupied by mature oak and sycamore woodland Some of these trees extend far enough tocontributetotheshadeof thestream.Ontheothersideasallow,Salix,andpoplar,Populussp.,treecovertheupper25%of thesite.Othervegetationof thevalleysidecomprisesamixtureof nettles,Urticadioica(50%),brambles, Rubus fruticosus, ivy, Hederahelixand mixed herbs. The stream is fringed by a similar mixwithadditional Dryopterissp.,grassesandhart'stonguefern, Aspleniumscolopendrium.Thegeologyof thesite isgranitewithalluviumoverlying.Thestreamsubstratecompriseslargelygravel(70%)withseveralsiltdeposits.Notes:Fishseen,butnotidentified.Catchment:ValléedesMouriers Site:M8(grid-ref 61225552) Datesampled:21.08.96Flowingroughlynorth,herethestreamalsorunsalongsidetheroadandisoneof two(M7aboveissituatedontheotherstream)thatmergetobecomethemainstreamof theValleedesMouriers.Theroadismetalledand supportsheavy touristcoach traffic in addition to the normalcars,etc.Thedust/stones on theroad'ssurfaceshowevidenceof roadrunoff enteringthestreamdirectly.Thewesternsideof theroadrisesintoagrass/herb-covered bank that, in turn,rises to arough grassland. The other sideof thestream is flankedwithtrees,mainlypoplars,Populussp.whichformtheperimeterof alargegarden.Thesamplingsitewas(after acquiring permission from the owners) situated directly opposite the end of the house. The landseparating the house from the stream was covered in gravel. The fringing vegetation of the stream wasmainlycomposedof nettles,Urticadioica(40%)andbrackenPteridiumaquilinum(30%).These,togetherwith the trees,contribute to a totalof 50%shade. Upstreamof thesite is impounded providing asmalli i ti i





Catchment:St.Peter'sSiteP5A(Grid-Ref 60295229)Datesampled:06.08.96Thestreamwasborderedbysteepbankswithunmanagedvegetation. TheA11roadrunsparalleltoitseastbank and it is crossed by a land to the south It passes through a dry reedbed upstream The shade cover





bankanditiscrossedbyalandtothesouth. Itpassesthroughadryreedbedupstream. Theshadecover(50%)isinfluencedbyoak,ashandsycamoretreeswithHemlockwaterdropwortandlesserwaterparsleypresent in the stream. The substrate is silt (50%) and cobbles (50%). The underlying geology isPleistocene/recent alluvium.Catchment:St.Peter'sSiteP5(Grid-Ref 60335217)Datesampled:06.08.96Thesite is located below 5A on themain stream above the confluencewith the tributary from 5A. Thestreammeandersthroughwoodland. Thesubstratecompositionissilt(20-100%)andgravel(0-80%). The80%shadecover is influenced byash with Menthaaquatica(Water mint)3%and Betulaerecta (Lesserwaterparsnip)beingpresentinthestream.Catchment:St.Peter'sSiteP7A(Grid-Ref 60855161)Datesampled:05.08.96AtthissitethestreamrunsparalleltotheA11onitseasternside. Thebanksweredenselyvegetatedwith Rubus fruticosus (bramble) and Urtica dioica (nettle) and the vegetation on the west bank had beencropped. Approximately 50%of the stream wasshaded. Thesubstrate wasdominated by cobbles(70

100%) with silt (0-30%). The underlying geology is Pleistocene/recent head overmudstones/sandsones/gritstones of the Jersey shale formation. The A11 is a busy road and the streamprobablyreceivesrunoff fromit.Catchment:St.Peter'sSiteP7(Grid-Ref 60975157)Datesampled:05.08.96The stream is situated below a pond and within rough pasture grazed by horses to the north and with

d t ti t th th Th t t ti i l d t i t ll i i d h l k

Catchment:St.Peter'sSiteP13(Grid-Ref 61664982)Datesampled:02.08.96The stream at this site is channelised at the base of granite walls 0.8-1.2m high. It runs parallel to a








http://slidepdf.com/reader/full/0.8-1.2m





The stream at this site is channelised at the base of granite walls 0.8 1.2m high. It runs parallel to afootpath on itswest bank with a field boundary on its east side. Thestream was dry above the sectionsampled. Itisundoubtedlyinfluencedbytidalincursionsandtheconductivityreadings(abovethelevelof detection) indicated high levels of salinity.Quercus ilex (Holm oak) andCarpinus betulus (hornbeam)contributedtothe100%shade. Nomacrophyteswerepresentinthestream. Thesubstratewasdominatedbysilt(50-90%)withcobbles(10-40%).Catchment:St.Peter'sSite:TessonMill(grid-ref.61645049)Datesampled:31.08.96Thissiteisinasemi-residential area,boundedbyaroadtothenorth(atributaryof theA11)andafootpathtotheeast. Thewallsof thestreamarechannelisedbya0.6mhighwallmadeof stoneblocks. Thestreamismoderatelyshaded(60%)byoaksfromthewestbank;nomacrophyteswerefoundwithin thesampledstretch. Thestreambed is unusual in thatitcontains primarily cobbles (40%) and silt(50%),with verylittlegravel(5%). TheunderlyinggeologyisJerseyShaleFormation. Atthetimeof samplinga1.2mhighwoodenfencewithplasticwire,wasbeingerectedandawheelbarrowlaywithin thestream. Thestreamliesbelow both road and footpath. Local information states thata0.1m thick layer of foam periodicallyappearsupstream. Regardedas'SSI'.Catchment:RozelSiteR1(Grid-Ref 70635245)Datesampled:31.07.96Thissectionof thestreamislocatedbelow awetlandandfarmyardwithanarablefieldsituatedtotheeastand a minor road below thesite. The steep banksof the stream are densely vegetated and the in-streammacrophytesaredominatedby Betulaerecta(Lesserwaterparsnip)25%.Thesubstrateiscomposedof silt(10%),pebbles(80%)andcobbles(10%)withtheexceptionof thelowerendof thesitewheresiltcoveris100% P i i f li b bt i d f th f (M C Mill F St M ti )

Catchment:WaterworksValley Site:W3(grid-ref.64175431) Datesampled:28.08.96Thisistheuppereastsiteof thecatchment,alsolyinginaprivatelyownedmeadow. Therewasevidence











e ppe e e o e e , o y g p e y o e e o . e e e e e

of cattle grazing and ducks also used this site. Upstream of this site was further pasture. Despite theunshadednatureof thesite, therewerefew aquaticmacrophytes in thestream,dominatedbyPolygonumhydropiper(5%cover). Thewaterwasshallowthroughoutitslength,butflowing(0.2m/s).Thewaterwasacloudylightbrownin colour,containing considerableamountsof suspendedmaterial. Thestream bedwas dominated by silt (60% cover), downstream of the sampled site this reached 0.23m depth. Theunderlyinggeologywasgranitic. ThisfieldisownedbyMr.Rowbottom.Catchment:WaterworksValley Site:W2(grid-ref:63395263) Datesampled:29.08.96This site lay on the edge of a grassy verge with the C119 passing 20m to the north and a beech/birchwoodland to the south. The site was moderately shaded (65% cover), with only Iris pseudacorus (1%cover)inthestreambed. Thesubstratewasdominatedbygravels,withsilt. TheunderlyinggeologywasJerseyShaleformationoverlainbyQuaternaryalluvium. TheC119wasnotheavilyused- intwohours,7carsandtwohorseswereseen.Catchment:WaterworksValley Site:W1(grid-ref.63255151) Datesampled:29.08.96Thisstreamlaytothenorthof theC118. Thesiteislocatedaftertheconfluenceof asmallstreamfromthewestandthemainstreamfromthenorth,whichpassesdownawatershute.Thebanksof thestreamhavebeen largely channelized with stone blocks,which atplaceshave fallen into the stream to create riffles.Thesitewasheavilyshadedontheedgeof asycamore/oakwoodland.Noaquaticmacrophyteswerefoundinthestreambed. Thesubstrateof thestreamwasdominatedbygravels(35%cover)andsilt(45%cover).The underlying geology was Jersey Shale formation overlain by Quaternary alluvium. The stream lay

i t l 1 2 b l th d h th di h f ff ibl

Catchment:Queen'sValley SiteGRO(Grid-Ref 696492) Datesampled:31.07.96Atthissite,thestreamflowsnorth-eastthroughgrazed pasturewhich isbordered by aroad to thesouth









, g g p y

west followed by arable fields. Silage or manure was being applied to the arable field at the time of sampling. Thestreambedwasdominatedbysilt(90%). Thedominantmacrophyte isWatercress(60%)providing shade for the substrate. The site is classified as an SSI. Permission for sampling may beobtainedfromthefarmsituated200mwestof thesite.

Appendix F Physico-chemical data from macroinvertebrate sites

Site mean mean mean % % cobbles % gravel % altitude distance pH conductivit Dissolved Calcium Carbonate Total % shade Surface

width (m) depth (cm) sediment boulders sediment (m) from y (µS) Oxygen (mg/l) hardness hardness flow (m/s)

depth (cm) source (mg/l) (mmol/l) (mmol/l)

(km)

St. Peter's Valley 1 0.97 4.3 0 5 15 78 2 340 0.02 6.5 600 5.5 52 0.7 2.2 98 0.045

St. Peter's Valley 2 0.85 7.4 12.33 0 0 0 100 320 1.3 7.5 5 40 6.1 36 1.4 1.8 90 0

St. Peter's Valley 3 0.93 4.7 44.67 0 0 0 100 290 1.8 6.7 570 7.2 44 1.15 1.8 100 0.13

St. Peter's Valley 4 *.* * * * * * * 200 3.3 7.8 590 8.8 44 1.2 2.1 60 0.2

St. Peter's Valley 4a 0.86 9.2 6.88 0 27 27 46 180 3.5 8.2 640 8.4 50 1.2 2.05 50 *

St. Peter's Valley 5 0.23 2 .11 12.94 0 0 30 70 160 4.1 7.6 640 7.7 44 1.2 1.9 80 *

St. Peter's Valley 5a 0.76 4 .88 4.94 0 33 50 18 160 3.9 7.6 710 5.6 52 1.6 2.2 50 *

St. Peter's Valley 7 0.93 3.16 4.11 0 57 0 43 100 5 7.8 720 7 50 1.7 2.5 70 *

St. Peter's Valley 7a 0.64 3.44 3.88 0 90 0 10 120 4.6 8 700 7 50 1.4 2.4 50 *



St. Peter s Valley 7a 0.64 3.44 3.88 0 90 0 10 120 4.6 8 700 7 50 1.4 2.4 50

St. Peter's Valley 8a 0.89 10.2 12.88 0 17 0 83 80 5.4 7.4 * 8.4 50 1.2 2.1 60 *

St. Peter's Valley 9a 0.75 2.77 8.88 0 43 0 57 55 6.2 7.8 720 9.4 52 1.4 2.4 20 *

St. Peter's Valley 9 1.05 9.11 2.11 0 40 0 60 60 6.1 7.8 7 00 9.4 54 1.4 2.4 70 0

St. Peter's Valley 13 0 2.16 2.27 0 27 0 73 30 6.9 7.6 9 00 6.7 81 2.5 3.66 100 0Tesson Mill SSI 1.7 6.9 0.16 5 40 5 50 40 6.5 7.8 670 7.7 60 2 2.4 60 0.008

Longueville 2

Longueville 3

Longueville 4

Longueville 5b

Longueville 5c

Longueville 8

Rozel 1

1.3

2.19

1.9

0.72

0.5

0.35

1.24

5

22

9

5.77

2.8

1.2

4.1

4.6

14

24

0.67

16.56

0

0.67

0

0

0

0

0

0

0

0

0

0

10

0

0

90

*

0

0

0

0

2

0

100

100

100

90

100

0

10

20

20

20

250

20

160

40

*

3.4

2.9

2.9

0.6

2.6

2.6

9.6

8

7.1

7.5

7.9

7.6

7.6

930

980

940

640

1150

860

620

11.9

7.6

8.3

7.6

7.2

9.6

6.2

96

102

100

46

114

92

46

2.7

3.1

2.2

1.1

2.9

2.1

1.7

3.4

3

3.2

1.75

3.55

3.5

1.9

0

0

0

70

0

40

50

*

*

0.001

0

0.1

0.333

0.15

Rozel 2 * * * * * * * 100 1.9 * * * * * * * *

Rozel 2 * * * * * * * * * * * * * * * * *

Rozel 3 1.3 2.5 0.16 0 60 20 20 100 1.4 7.7 630 8.6 54 1.1 2 65 0.13

Rozel 4 * * * * * * * 100 2.4 * * * * * * * *

Rozel 5 0.38 0.26 0.75 0 27 3 33 120 0.13 7.5 1020 7.9 74 0.4 3 70 0.06

Waterworks Valley 4

Waterworks Valley 3

Waterworks Valley 2

Waterworks Valley 1

Millbrook SSI

0.27

0.77

1.33

1.36

0.66

3.1

4.3

13.8

11

8.2

0.35

1.44

2.22

2.33

1.44

0

0

0

3

0

0

2

3

15

3

1

42

52

35

45

99

56

45

47

52

360

360

200

180

40

0.65

0.15

2.95

4.05

5.55

7

7.8

8.1

8

7.7

420

820

590

590

670

7.9

3.9

9.8

8.8

7.8

40

48

49

52

60

0.7

4.1

1.1

1.1

1.8

1.3

2.4

2

2.1

2.3

0

8

65

93

98

*

0.2

0.2

0.33

0.22

Bellozanne Valley 2403


Bellozanne Valley 2404a

Bellozanne Valley 2404b


Vallée des Vaux 2505

0.72

0.82

0.95

1.08

1.1

1.22

4.1

6.7

4

6.3

3

5.9

0.72

0.33

1.5

0.5

0.08

1

0

0

0

0

0

0

30

5

30

20

28

2

20

0

30

35

32

48

50

95

40

45

40

50

160

160

200

200

280

80

0.6

2.4

1.75

1.77

0.75

4.7

7.9

7.8

7.8

7.4

7.1

8.2

670

580

490

520

450

520

9.2

10

9.5

8.9

10

9

60

54

56

62

46

46

1.3

1.1

1.1

1.1

0.8

1.3

2

1.9

2

2

1.6

1.8

0

98

65

0

30

25

0.33

0.25

0.25

0.25

0.22

0.29

Vallée des Vaux 2506 1.82 5 1 0 30 35 35 180 3.1 7.3 490 8.8 46 1.4 1.7 40 0.33

Vallée des Vaux 2507 1.3 9.4 23.3 0 2 0 98 260 2 8.9 450 9.7 44 1.5 1.4 0 *

Grands Vaux 2502 1.95 6.9 0.61 0 30 68 2 200 3.1 7.3 520 9.5 52 2.2 1.8 95 0.33

Grands Vaux 2503 0.33 2 3.33 0 35 55 10 220 2.65 7.2 430 7.9 48 1.3 1 .3 0 0.2

Grands Vaux 2504 0.93 11.9 7.5 0 40 20 40 300 1.05 7 450 7 .5 34 0.9 1.4 0 0.07

Grands Vaux SSI 0.94 6 4.3 0 30 * 70 200 2.8 7.5 580 8.7 56 1.6 1.85 90 0

Vallée des Vaux SSI 1.23 3.1 3 0 43 47 10 160 4.2 7.9 640 8.2 50 1.2 1.9 50 0.2

Vaux de Lecq 2202

Vaux de Lecq 2203

Vaux de Lecq 2204

Vaux de Lecq 2205

Vaux de Lecq 2206

Vaux de Lecq 2207

Prés d'Auvergne

Mourier 1

0.3

1.7

1.4

0.9

2.1

0.8

0.35

2.65

1.2

5.7

4.7

12.1

34.8

3.8

4.3

9.5

2.67

2.44

3.89

1.2

17.5

6.44

3.67

0

45

15

8

5

0

0

5

5

5

5

10

5

0

0

10

2

45

55

70

80

0

10

35

93

5

25

12

10

100

90

50

0

60

80

190

240

285

290

80

160

2.23

1.9

1.33

0.78

0.33

0.08

1.67

1.83

6.8

7.5

7.4

7.2

6.9

7

7.8

6.9

810

770

760

540

590

970

700

690 *

8.5

8.2

9.4

6.7

1.4

1.4

8

62

60

50

38

29

45

62

42

0.7

1.1

1

1

1.4

3.3

1.2

0.7

2.9

2.5

2.3

1.5

1.4

2.7

2.6

2.4

100

60

40

40

95

99

50

20

*

*

*

0.4

0.31

0

0.02

0.08

Mourier 3 0.75 4.1 2.44 8 15 60 17 120 1.95 7.2 690 5.1 36 0.7 2 90 0.02

Mourier 4 1.35 5.9 0.16 10 40 50 0 190 1.5 7.5 700 9.2 45 0.3 2.5 95 0.4

Mourier 5 0.96 6 0.11 40 3 0 30 0 200 1.33 7.2 720 8.8 44 0.4 2.4 10 0.33

Mourier 6 1.07 8 0.16 15 5 0 30 5 240 1.05 7.3 720 9.7 45 0.3 2.5 80 0.33

Mourier 7 0.83 5.2 0.88 7 8 70 15 250 0.98 7.5 740 8.6 58 0.4 2.4 80 0.25

Mourier 8 0.89 9.3 1.78 8 3 80 9 260 0.5 6.7 670 7.7 42 0.6 2.2 50 0.33

Mourier SSI 1.57 7.6 0.06 0 50 45 5 280 0.99 7.2 680 9.5 46 0.5 2.4 25 0.25

Grouville SSI 1.14 12.88 7 0 3 0 97 20 2.3 7.4 740 5.1 66 2.3 2.5 60 0.16

Section3



Assessmentof waterqualityinJerseystreams

DrMark

Wyer

and

Professor

David

Kay

June1997

ExecutiveSummary



1. Over 9000 surface water quality measurements for Jersey streams wereindependentlyassessedbytheCentreforResearchintoEnvironmentandHealth.

2. Measurements of a range of general parameters, nutrients (ammonium, nitrate,nitrite, phosphate and potassium) and faecal indicators were assessed usingstatisticalsummariesandcomparisonswithrelevantECDirectivecriteria.

3. The results demonstrate that Jersey stream waters are far from pristine withrelatively

few

samples

within

Guide

criteria

specified

in

the

drinking

water

abstraction Directive 75/440/EEC A1 "waters requiring simple physicaltreatment"andfreshwaterforfishlifeDirective78/659/EEC.

4. Jerseystreamshaveparticularlyhighnitrateconcentrationsandlessthan20%of all samples had concentrations below the drinking water abstraction Directive75/440/EEC ImperativeandwaterforhumanconsumptionDirective80/778/EECmaximumadmissibleconcentrationof 50mg/lNO3.

5. Water quality isparticularly poor indischarges from small streamsdraining thesoutheastof Jerseywherereceivingcoastalwatersareusedforshellfisheries.

6. Waterqualityparameters,asmeasuredbyspotsamplingareonlyweaklyrelatedto indices of ecological status and thus do not appear to be useful indices of

Tableof Contents ExecutiveSummary



1 Introduction page1 1.1 Streamwaterqualitymonitoring page1

2 Dataanalysis page2 2.1

Statistical

analysis

page

2

2.2 Compliancecriteria page2 3 Results page4

3.1 Statisticalsummaries page4 3.1.1 Generalparameters page4 3.1.2 Nutrients page5 3.1.3 Faecalindicatororganisms page5

3.2 Relationshipswithmacroinvertebrateanalysis page6 3.3 ComparisonswithECDirectivecriteria page7

Listof Figures Figure1.1 Streamwaterqualitysamplingpoints



Figure3.1 Medianandrangeof temperature(˚C)inJerseystreamsFigure3.2 Medianandrangeof pHinJerseystreamsFigure3.3 Medianandrangeof conductivity(µS)inJerseystreamsFigure3.4 Medianandrangeof dissolvedoxygen(%saturation)inJerseystreamsFigure3.5 Medianandrangeof chemicaloxygendemand(mg/lO2)inJerseystreamsFigure3.6 Medianandrangeof chlorideconcentrations(mg/lCl)inJerseystreamsFigure3.7 Medianandrangeof ammoniumconcentrations(mg/lNH4) in Jersey

streamsFigure3.8 Medianandrangeof nitrateconcentrations(mg/lNO3)inJerseystreamsFigure3.9 Medianandrangeof nitriteconcentrations(mg/lNO2)inJerseystreamsFigure3.10 Medianandrangeof ortho-phosphateconcentrations(mg/lP2O5) in Jersey

streams

Listof Tables Table2.1 RelevantECDirectivecompliancecriteria



Table3.1 Summaryof temperatures(˚C)inJerseystreamsTable3.2 Summaryof pHinJerseystreamsTable3.3 Summaryof conductivity(µS)inJerseystreamsTable3.4 Summaryof dissolvedoxygen(%saturation)inJerseystreamsTable3.5 Summaryof chemicaloxygendemand(mg/lO2)inJerseystreamsTable3.6 Summaryof chlorideconcentrations(mg/lCl)inJerseystreamsTable3.7 Summaryof ammoniumconcentrations(mg/lNH4)inJerseystreamsTable3.8 Summaryof nitrateconcentrations(mg/lNO3)inJerseystreamsTable3.9 Summaryof nitriteconcentrations(mg/lNO2)inJerseystreamsTable3.10 Summaryof ortho-phosphateconcentrations(mg/lP2O5)inJerseystreamsTable 3 11 Summary of total phosphate concentrations (mg/l P) in Jersey streams

Table3.21 Numbersof samples�chlorideconcentrationvaluesspecifiedinECDirectives



Table3.22 Numbersof samples�ammoniumconcentrationvaluesspecifiedinECDirectives

T bl 3 23 N b f l i i l ifi d i EC



Table3.23 Numbersof samples�nitrateconcentrationvaluesspecifiedinECDirectives

Table3.24 Numbersof samples�nitriteconcentrationvaluesspecifiedinECDirectives

Table3.25 Numbersof samples�ortho-phosphateconcentrationvaluesspecifiedinECDirectives

Table3.26 Numbersof samples�potassiumconcentrationvaluesspecifiedinECDirectives

Table3.27 Numbersof samples�faecalindicatorconcentrationvaluesspecifiedinECDirectives

Table4.1 Summaryof waterqualitydataforstreamcatchmentsmonitoredontheislandof Jersey

Table4.2 Summaryof samplesfromJerseystreamspassingarangeof ECDirectivecriteriaforsurfacewaters

1 IntroductionThis report provides an independent assessment of water quality in fresh water



streamsontheislandof Jersey. TheassessmentisbasedondatacollectedbytheStatesof Jersey Public Services Department (PSd) pollution control team and provides: (i)statistical summaries of results and (ii) a compliance assessment against relevant ECDirectivestandards.1.1 Streamwaterqualitymonitoring

Routine monitoring of surface water quality in streams draining the island of Jersey

by

the

PSd

pollution

control

unit

was

initiated

in

1994.

This

report

is

based

on

all

availabledatatoNovember1996. Waterqualityparametersmeasuredcoverthreebroadcategories:

(i)GeneralparametersStreamtemperature(˚C), pH(pHunits), Conductivity

(µS),

Dissolvedoxygen(DO,%saturation), Chemicaloxygendemand(COD,mg/lO2) and Chloride(mg/lCl-)(ii)Nutrients

This monitoring programme has provided information covering the majorcatchmentsdrainingtothesouth(StAubin'sBay)andeastcoastsof Jersey. Drainagetothe north is limited to small catchments by the physiography of the island and is



the north is limited to small catchments by the physiography of the island and isrepresented by two neighbouring catchments: Les Vaux de Lecq and La Vallée desMouriers. Thespatialcoveragehasgenerallyexcludedcatchmentsdraining to thewest(St Ouën's Bay) and south west (St Brélade's Bay) coasts as well as small north coastcatchmentseastof LaValléedesMouriers(e.g.LesVauxdeRozelandBouleyBay)andwestof LesVauxdeLecq(e.g.LaValBachelier,drainingtoPlémontBay)(Figure1.1).Theprogrammealsoexcludessmallercatchmentsdrainingtothewestof StAubin'sBay(e.g. into St Aubin's harbour) and the stream draining the Bellozanne Valley.Bacteriologicalandsomenitratedataforsomeof thesecatchmentshavebeenprovidedinpreviousCREH reports to PSd (Joneset al., 1993; Wyer et al.,1994). However thesedata are limited to summer conditions and have thus not been included in compliancecomparisons.2 Dataanalysis2.1 Statisticalanalysis

Simple descriptive statistics were used to compare water quality monitoringresults between sites in each catchment area. With the exception of bacterial faecalindicator parameters, the median valuewasused to describe central tendency for eachparameterateverysite. Forthebacterialparameters,thegeometricmean(antilogof themean of log10 transformedconcentrations) wasused as the central tendency descriptor.

(80/778/EEC)(EC,1980). WhilstsurfacewatersonJerseydonothavetocomplywithEC Directives, these standards provide a range of benchmarks against which waterqualitycanbeassessed. EachDirectivehasthreepossiblecompliancelevels:



(i)

Guide- recommended

concentrations

(ii) Imperative- mandatoryconcentrations(iii) Maximumadmissibleconcentration(MAC)whichshouldnotbeexceeded.

ThedrinkingwaterabstractionDirectiveappliestorawwatersusedfordrinkingwater supply and has three levels covering pristine waters, requiring little treatment,throughtocontaminatedwaters,requiringintensivetreatmentpriortosupply:



(i) A1- waterrequiringsimplephysicaltreatment,(ii) A2- waterrequiringnormalchemicaltreatmentanddisinfectionand(iii) A3- waterrequiringintensivechemicaltreatment.ThisDirectivedoesnot includeanyMACvaluesandspecifies95%compliance

with Imperative and 90% with Guide criteria. For certain parameters, includingconductivity, COD, ammonium, nitrate and phosphates, any samples exceedingcompliancelevelsshouldnotdeviatebymorethan50%of thespecifiedvalues. Jerseydatawerethuscomparedto Imperative+50%andGuide+50%valuesinadditiontothespecified complianceconcentrations. TheseDirective standardsarebroadly relevant toJerseysurfacewaters,manyof whichareusedforabstraction.

ThefreshwaterforfishlifeDirectivehastwolevels,themorestringentappliestothesensitivesalmonidgroupof fish speciesand the other tocyprinids. Whilst surfacewaterstreamsonJerseyarefartoosmalltosupporttheirownfisheries,streamsdosupplyreservoirsandpondsstockedwithfishforrecreationalangling. Streamwaterqualityinrelation to thisDirective isof direct relevance in thiscontext. In addition, comparisonwith thisDirectiveprovidesanecologicalwaterquality index. Thefreshwaterforfishlife Directive does not specify MAC values for any criteria measured in the Jersey

3 Results 3.1 Statisticalsummaries



3.1.1 GeneralparametersStream temperatures (Table3.1 andFigure3.1) showa typical range (3.6 ˚C to

23.9 ˚C) for temperate maritime northern Europe. Winter temperatures remain above0˚C.

Median pH values (Table 3.2 and Figure 3.2) show most of the streams to becircumneutral.

Exceptions

include

sites

in

the

headwaters

of

both

the

St

Peter's

Valley

(sitesP1- P3a)andVauxdeLecq (sites2206 and2207)catchmentswheremedianpHvalues were slightly more acidic (< 6.5). Of the sites with more than one analyticalresult,twositesintheLonguevillecatchmenthaveconsistentlyacidicwater:L6(medianpH6.35)andL8(medianpH6.54)(Table3.2andFigure3.2)andoneinLaValléedesMouriers (M4, median pH 6.3). The following sites have particularly wide pH rangeswithuppervaluesexceedingpH8.5:M2(maximumpH9.3),R0a(maximumpH10.04)andP7(maximumpH8.68).

Median conductivity (Table3.3and Figure3.3) is typically in the range500 to1000 µS. Exceptionsare:thesoutheastcoaststreamwateroutfalls(excludingsite21),theoutletof Longuevillecatchment(siteL0)andsiteR5 in theRozelcatchmentwheremedian conductivity exceeds 1000 µS. The south east coast stream outfalls showparticularly wide ranges in conductivity especially at sites 16, 17, 19 and 20 where

pattern reflects sea water incursion as reflected in parallel conductivity measurements(Figure3.3).



3.1.2 NutrientsMedian ammonium concentrations in Jersey streamsaregenerallybelow2mg/l

andoftenbelow1mg/l(Table3.7andFigure3.7). Exceptionsincludesoutheastcoast



g ( g ) p

streamoutfallsites11and16. ThesingleresultforLonguevillecatchmentsiteL2isalsohigh. Relativelyhighmaximumconcentrations(above5mg/l)arealsoevidentat: RozelcatchmentsiteR3,StPeter'sValleycatchmentsitesP1,P3andP11.

The median nitrate concentrations in Jersey streams generally exceed 50 mg/l(Table3.8andFigure3.8). Exceptionsare:RozelcatchmentsiteR3d(singleresult)andSt Peter's Valley site P3a. Median and maximum nitrate concentrations appear to beexceptionally high at south east coast stream outfall sites 11 and 14 where maximumvaluesexceed1000mg/l(Figure3.8).

Table3.9andFigure3.9summarizenitriteconcentrationdata. Atthemajorityof sites median nitrite concentrations are below 0.5 mg/l and maximum concentrationsbelow1mg/l. Exceptionsare:RozelcatchmentsiteR3,StPeter'sValleysitesP1andP6,VauxdeLecqsites2205and2206andsoutheastcoaststreamoutfallsites11,12,14,16,18,19and21wheremaximumvaluesexceed1mg/l. southeastcoaststreamoutfallsite21hasthehighestmaximumnitriteconcentrationapproaching40mg/l.

Medianphosphate(P2O5)concentrationsaregenerallylessthan2mg/l(table3.10and Figure 3.10). This value was exceeded at: Rozel catchment site R0a, St Peter'sValleysitesP1,P6andP7aandsoutheastcoaststreamoutfallsites11,14,16and22.South east coast stream outfalls11 and 14 show particularly highmaximumphosphate

Table3.14andFigure3.14summarizethedataforfaecalcoliformconcentrationsinJerseystreams. Withtheexceptionof thefollowingsites:LonguevillecatchmentsitesL3andSSI,VauxdeLecqsites2205,2206and2206aandsoutheastcoaststreamoutfallsites11,12and14,geometricmeanfaecalcoliformconcentrationsdonotexceed10,000



, , g ,

cfu/100ml. Thelowestgeometricmeanconcentrations(<40cfu/100ml)areassociatedwith site L8 in the Longueville catchment. The highest maximum concentrations,greaterthanorequalto1,000,000faecalcoliforms/100mlareatsoutheastcoaststreamoutfall site 16 and Rozel catchment site R3. Several other sites have maximumconcentrationsabove100,000cfu/100ml(i.e.log10=5)(Figure3.14).

GeometricmeanfaecalstreptococciconcentrationsinJerseystreamsaregenerallybelow2000cfu/100ml(i.e.log

10 =3.3)(Table3.15andFigure3.15). Highergeometric

mean faecal streptococci concentrations are found at: Longueville catchment SSI, StPeter'sValley site P1, Vaux deLecq site 2205, south east coast stream outfall sites15and20,GrouvilleSSIandValléedesVauxSSI. Relativelylowgeometricmeanfaecalstreptococci concentrations, below 100 cfu/100ml are found at Longueville catchmentsite L8 and south east coast stream outfall site 22. Maximum faecal streptococciconcentrationsexceed100,000cfu/100mlatasinglesite:LonguevillecatchmentSSI.3.2 Relationshipswithecologicalstatus

Table 3.16 shows the results of simple correlations between water qualityvariables and ecological indices. Several significant correlations between median /geometric mean water quality parameters and ecological status are apparent, thoughvaluesof correlationcoefficients(r)arelow,neverexceeding0.575. Thisindicatesonly

be associated with the first two ordination axes (Eigen values, Axis 1: 0.048, Axis 2:0.017). Subsequent axes had very small Eigen values (less than 0.005) and explainedlittle additional variance in water quality. Spearman's rank correlation between axisscoresand waterqualityparameters/ecological indiceswere thusrestricted to thefirst



q y p g

twoordinationaxes(Table3.17). Theresultsshowsomehighlysignificantcorrelations( p<0.001)betweenaxisscoresandwaterqualityparameters.ThetwovariablesshowingthehighestcorrelationswithAxis1scoresare:mediannitriteconcentration(r=0.641)and median dissolved oxygen (% saturation) (r = -0.568). For Axis 2 median nitrateconcentration(r=0.807)andmedianpotassiumconcentration(r=-0.708)arethemosthighly correlated variables with axis score. Axis scores are not well correlated withecologicalindices,thesinglesignificantcorrelationisbetweenAxis1scoreandASPT(r= -0.469) (Table 3.17). This relationship may reflect the aforementioned significantnegativecorrelationsfoundbetweenwaterqualityparametersandASPT(Table3.16).3.3 ComparisonswithECDirectivecriteria

Comparisonsof Jersey streamwater quality data with criteria from relevant ECDirectives(Table2.1)weremadebytabulatingthenumberof sampleslessthanorequalto specified values, or within a specified range in the case of pH data. Each tableincludesthetotalnumberof observations(n)forcomparison. Thedatawerenotassessedintermsof percentagecompliance. Thiswasduetothesmallnumbersof observationsatsome sites for certain parameters and the amalgamation of all available data over anumberof years. Comparisonsweremadefor individualsitesineachcatchmentgroupandforeachcatchmentgroupasawhole.

Comparisons with drinking water abstraction A3 Guide criteria for chemicaloxygendemandareshowninTable3.20. Themajorityof Jerseystreamwaterresultsforchemicaloxygendemanddonotexceedtheselevels,withallsamplesfromLaValléedesMouriers showing compliance. Exceedences appear to be more broadly distributed



amongsites, thoughLonguevillecatchmentsiteL3, RozelcatchmentsitesR0aandR3,StPeter'sValley sites P7a, P12 and P13 and Vaux deLecq sites 2202 and 2205 showrelativelyhighproportionsof samplesexceedingthecriteria. AtsitesR0a,P12andP13thismayrelate to thepresenceof seawater. Thesoutheastcoaststreamoutfallsshowgreaterlevelsof exceedencethanothergroups.

Table 3.21 shows comparisons of Jersey stream data for chloride with Guideconcentrations specified in the drinking water abstraction and water for humanconsumption Directives. All samples exceed the chloride level in water for humanconsumption. All samples from La Vallée des Mouriers, Vaux de Lecqand other SSIgroups had chloride concentrations below the drinking water abstraction Guide values.IntheLonguevillecatchmentexceedenceof thesevalueswasrestrictedtothecatchmentoutlet(siteL0),whichisaffectedbyseawater(Table3.21). ThiswasalsothecaseattheStPeter'sValleyoutlets(sitesP12andP13). Severalsamplesfromthesoutheastcoaststream outfall sites 16 to 20 and 22 had chloride values in excess of the EC Directivevalues. Thiswillrelateinparttotheproximityof thesesitestothesea.3.3.2 Nutrients

Comparisonsof JerseydatawithECDirectivecriteriaforammoniumweremadeat 12 levelsof decreasing stringency, themost stringent level being the fresh water for

criterion. InStPeter'sValleytheproportionof samplesexceedingthislevelamountedto87%. Onlytwosamples,of 100,fromVauxdeLecqhavenitrateconcentrationsbelowanyof thespecifiedvalues. Of thesoutheastcoaststreamoutfallgroupsites11,14and22 have nosampleswith nitratevaluesbelow specifiedvalues. The"otherSSI"group



also show a high proportion of samples (72%) with concentrations above the 50 mg/llevel.Comparisonsof Jersey streamwater data withnitrite Guidecriteria specified in

the fresh water for fish Directive show that very few samples comply (Table 3.24).Indeed many sites (59/78 sites with data) have no compliant results at these levels.Overall,45%of thenitriteresultsexceedthelessstringentwaterforhumanconsumptionMAC. Siteswhereallsamplesexceed thisvalueare:LonguevillecatchmentsitesL0,L1andL7, StPeter'sValleysiteP3,VauxdeLecqsites2204,2205and2206,southeastcoaststreamoutfallsites11121415171920and21andGrouvilleSSI.

Theresultsof phosphatedeterminationsforJerseystreamwatersshow thatveryfew sites have concentrations exceeding the water for human consumption MAC (5.0mg/l)(Table3.25). SiteswheresamplesdoexceedthislevelareP1andP6inStPeter'sValleyandsoutheastcoaststreamoutfallsites11,14,16and22. Allsamplesat thesesix sites exceed the more stringent drinking water abstraction and water for humanconsumption Guide values. Relatively few samples (23%) have phosphateconcentrationsbelowthestringentdrinkingwaterabstractionA1Guidevalue(0.4mg/l).Numbersof samplesbelowthislevelwereparticularlylowinVauxdeLecq(3%)andthesoutheastcoaststreamoutfalls(12%). However,overhalf of thesamplesanalysedhavephosphateconcentrationsbelowthedrinkingwaterabstractionA2/A3criterion(0.7mg/l)

4 Summaryandconclusions4.1 Summary



TheStatesof JerseyPSdPollutionControlUnitsamplingprogrammehascoveredsixcatchmentareasinspatialdetailplusagroupof sitesof specialinterestgivingatotalof 80 sampling sites. Tables 4.1 and 4.2 summarise over 9000 analytical resultsdescribing stream water quality on Jersey. The Tables provide aggregated figures foreach of the seven catchment groups, plus overall values based on all data available.Table 4.1 summarises these data in terms of median/geometric mean and range valueswhilst Table 4.2 provides comparison with EC Directive criteria detailed in Table 2.1.TheseTablesallowbroadscalecomparisonsof waterqualityparametersbetweenthesitegroups.

GeneralwaterqualityparametersindicatethatJerseystreamshavecircumneutralpH with overall median conductivity around 730µS (Table 4.1). Slightly elevatedmedianpHandconductivityareassociatedwith thesoutheastcoaststreamoutfalls. Arelatively high proportion of samples pass the relevant EC Directive criteria for pH,conductivity,CODandchlorideinsurfacewaters(i.e.thesurfacewaterabstractionandfresh water forfish lifeDirectives) (Table4.2). However, the south east coast streamoutfall sites show relatively low proportions of samples below Directive values forconductivity,CODandchloride.

Overall median concentrationsof ammonium are less than 0.5 mg/l (Table 4.1).Thehighestmedianammoniumconcentrations(1mg/l)areassociatedwiththesoutheast



ReferencesEC (1975). “Europeancouncildirective75/440/EECof 16June1975concerningthequalityof surfacewatersintendedfortheabstractionof drinkingwatersinthemember



states.” Official Journal L194: 26-31.EC (1978). “Europeancouncildirective78/659/EECof 18July1978concerningthequalityof freshwatersneedingprotectionorimprovementinordertosupportfishlife.”Official Journal L222: 1-10.EC (1979). “Europeancouncildirective79/869/EECof 9December1979concerningthemethodsof measurementandfrequenciesof samplingandanalysisof surfacewaterintendedfortheabstractionof drinkingwaterinthememberstates.” Official Journal L271: 45-53.EC (1980). “Europeancouncildirective80/778/EECof 15July1980relatingtothequalitywaterintendedforhumanconsumption.” Official Journal L194: 26-31.Jones, F., KayD., andWyerM.D. (1993). “Assessmentof thebacteriologicalqualityof bathingwatersandlanddrainagetotheJerseycoastalzoneduringthe1993bathingseason”. ReporttotheStatesof JerseyPublicServicesDepartment. 20pp.CREH, Universityof Leeds.WyerM.D., Crowther, J. andKayD.(1995). “Furtherassessmentof non-outfallsourcesof bacterialindicatorstothecoastalzoneof theislandof Jersey”. Reporttothe



FIGURES

St. Peter's

Valley

Les Vauxde Lecq

Waterworks

Valley

La Vallée

des Mouriers

Rozel

catchment

Grands V

aux /

Vallée des Vaux

M1

M4

M5

M6

M8 M7

P1

P2

P3

M2

2200

22022208

2201a2203

2204

2205

22062207

P3a

P4a

Les Pres

D'Auvergne

M3

2201



H

0 1 km

P13P12

2

L0

1122

12

14,15

16

17

18

19

2021

Queen'sValley

MeanHigh Water

Mean Low Water

PSd Sampling point

Site of Special Interest

Legend

Figure 1.1 Stream water quality sampling points

St. Aubin's

Bay

St. BréladesBay

St. Ouën'sBay

J

St. Helier

St Peter's

Valley

Longuevillecatchment

South eastcoast outfalls

R0a

R1

R2R5

R4

R3

R0

L4L2

L5a

L5L8

L5b

L6

L7

L3

P4aP4

P5

P6

P8aP7

P9P9a

P7a

P11

Millbrook

Grouville

GrandsVaux

Vallée

desVaux

St Helier

St. Catherine'sBay

Royal Bay

of GrouvilleL1

P5a

































TABLES



80/778/EECWaterforhumanconsumption NosamplesshouldexceedMACvaluesandideallyshouldnot exceedGuidevalues



_____________________________________________________________________________

Table2.1 RelevantECDirectivecompliancecriteria(continued) Parameter Directive Guide Imperative MAC*_Phosphates 75/440/EECDrinkingwaterabstraction,A11 0.4 -. -.



(P2O5mg/l) 75/440/EECDrinkingwaterabstraction,A22 0.7 -. -.

75/440/EECDrinkingwaterabstraction,A33 0.7 -. -.

80/778/EECWaterforhumanconsumption 0.4 -. 5.0Potassium 80/778/EECWaterforhumanconsumption 10 -. 12(Kmg/l)Total 75/440/EECDrinkingwaterabstraction,A1 50 -. -.coliforms 75/440/EECDrinkingwaterabstraction,A2 5000 -. -.

(cfu/100ml) 75/440/EECDrinkingwaterabstraction,A3 50000 -. -.

80/778/EECWaterforhumanconsumption -. -. 0Faecal 75/440/EECDrinkingwaterabstraction,A1 20 -. -.

coliforms 75/440/EECDrinkingwaterabstraction,A2 2000 -. -.


80/778/EECWaterforhumanconsumption -. -. 0Faecal 75/440/EECDrinkingwaterabstraction,A1 20 -. -.

streptococci 75/440/EECDrinkingwaterabstraction,A2 1000 -. -.


80/778/EECWaterforhumanconsumption -. -. 0Notes:* AC i d i ibl i hi h h ld b d d

____________________________________________________________________ Table3.1 Summaryof temperatures(˚C)inJerseystreams Site Median Min Max n_LonguevilleL0 15.40 4.70 18.80 5L1 13 10 6 70 18 80 14



10

20

L1 13.10 6.70 18.80 14L2 7.70 7.50 8.90 3L3 11.00 3.60 22.40 14L4 12.90 5.00 18.70 15L5 9.00 3. 19.70 13L5a 13.75 4.90 17.20 14L5b 13.55 4.70 19.00 14L6 12.20 10.00 15.60 11L7 * * * 0 L8 12.70 10.30 14.90 14SSI 14.65 8.00 18.50 14LaValléedesMouriersM1 11.90 8.70 17.80 5M2 12.70 9.50 20.60 7M3 8.50 8.50 8.50 1M4 12.40 8.10 14.00 15M5 13.60 6.00 15.90 15M6 11.80 6. 15.00 11M7 13.50 5.70 16.40 15M8 13.50 7.30 15.10 15SSI 12.85 8.70 15.90 14RozelR0a 12.75 6.40 17.50 16R0 8 25 4 00 10 70 6

____________________________________________________________________ Table3.1 Summaryof temperatures(˚C)inJerseystreams(continued) Site Median Min Max n_VauxdeLecq2200 11.00 7.00 16.60 112201 9 55 5 80 15 90 6



2201 9.55 5.80 15.90 62201a 13.60 9.40 16.80 72202 11.20 5.20 15.60 132203 13.00 6.30 17.00 142204 10.50 9.20 14.00 32205 12.15 5.90 15.80 142206 11.60 9.40 15.20 92206a * * * 02207 12.60 11.30 13.90 22208 12.75 7.70 15.60 10Southeastcoastoutfalls11 12.40 7.00 18.40 612 12.35 7.10 17.80 614 13.65 6.50 17.60 815 * * * 0 16 14.80 5.40 18.70 717 12.10 5.60 17.60 718 11.30 5.00 17.30 719 12.60 6.00 17.10 820 12.20 5.50 17.90 821 8.30 5.10 11.00 322 8.30 5.30 10.40 3OtherSSI'sGrouville 14 05 8 00 18 50 14

____________________________________________________________________ Table3.2 Summaryof pHinJerseystreams Site Median Min Max n_LonguevilleL0 7.610 7.490 7.720 5L1 7 360 6 520 7 590 15



L1 7.360 6.520 7.590 15L2 6.990 6.510 7.000 3L3 7.460 6.570 8.230 15L4 7.015 6.770 7.380 16L5 7.495 5.830 7.930 14L5a 7.750 6.990 8.330 15L5b 6.870 6.080 7.700 15L6 6.350 6.030 6.900 12L7 * * * 0 L8 6.540 6.330 6.890 15SSI 7.220 6.800 8.180 14LaValléedesMouriersM1 6.920 6.250 7.660 5M2 7.150 6.620 9.350 7M3 6.810 6.810 6.810 1M4 6.300 5.940 6.910 15M5 6.810 6.550 7.110 15M6 6.850 6.530 7.070 11M7 6.970 6.670 7.290 15M8 6.520 6.150 7.280 15SSI 6.810 6.620 7.300 14RozelR0a 7.080 5.640 10.040 19R0 6 965 6 220 7 560 8

____________________________________________________________________

Table3.2 Summaryof pHinJerseystreams(continued) Site Median Min Max n_VauxdeLecq2200 7.180 5.280 7.500 152201 7 390 6 700 7 760 6



2201 7.390 6.700 7.760 62201a 7.090 6.080 7.250 102202 7.100 6.290 7.550 162203 7.095 6.310 7.450 182204 6.820 6.630 7.340 72205 6.715 6.210 7.240 182206 6.180 5.590 7.330 122206a 6.100 6.100 6.100 12207 5.990 5.860 6.050 32208 7.075 6.350 7.400 10Southeastcoastoutfalls11 7.470 7.180 7.720 612 7.905 7.780 8.100 614 7.280 6.710 7.830 915 * * * 0 16 7.715 7.260 8.210 817 7.440 7.230 7.800 718 7.430 7.160 7.890 719 7.250 6.970 7.530 820 7.360 7.120 7.670 821 7.255 7.160 7.570 422 8.015 7.510 8.390 4OtherSSI'sG ill 260 6 50 590 14

____________________________________________________________________ Table3.3 Summaryof conductivity(µS)inJerseystreams Site Median Min Max n_LonguevilleL0 3490 1867 9009 5L1 998 851 1317 14



L2 802 703 875 3L3 966 671 1065 14L4 819 669 933 15L5 809 468 900 13L5a 927 887 969 14L5b 687 627 711 14L6 791 767 816 11L7 * * * 0 L8 964 930 992 14SSI 848 596 1005 14LaValléedesMouriersM1 740 727 855 5M2 780 735 862 7M3 725 725 725 1M4 773 732 963 15M5 718 594 771 15M6 730 702 811 11M7 732 612 762 15M8 680 548 764 15SSI 700 609 747 14RozelR0a 661 393 741 15R0 721 535 1869 6

____________________________________________________________________ Table3.3 Summaryof conductivity(µS)inJerseystreams(continued) Site Median Min Max n_VauxdeLecq2200 824 685 912 112201 909 805 950 6



2201a 778 683 882 72202 811 593 873 132203 777 678 838 142204 762 734 852 32205 776 639 810 142206 787 644 813 92206a * * * 02207 785 720 849 22208 885 753 951 10Southeastcoastoutfalls11 2690 1454 3350 512 1257 1217 1285 514 3100 2210 3895 715 * * * 0 16 2000 337 13290 617 1490 397 5640 618 1145 684 1838 619 1295 704 4970 720 2740 1184 112400 721 775 10 777 322 2208 2200 2215 2OtherSSI'sGrouville 770 627 820 14

____________________________________________________________________ Table3.4 Summaryof dissolvedoxygen(%saturation)inJerseystreams Site Median Min Max n_LonguevilleL0 * * * 0 L1 57.00 7.47 92.00 11



L2 7.45 7.45 7.45 1L3 56.50 7.39 92.00 10L4 75.50 7.37 93.00 12L5 85.00 7.39 91.00 9L5a 86.00 49.00 94.00 11L5b 73.50 71.00 76.00 2L6 63.50 6.66 71.00 8L7 * * * 0 L8 60.00 60.00 60.00 1SSI 79.00 52.00 122.00 7LaValléedesMouriersM1 93.00 88.00 95.00 3M2 96.00 92.00 105.00 5M3 96.00 96.00 96.00 1M4 87.00 83.00 95.00 11M5 88.50 84.00 95.00 12M6 88.00 78.00 94.00 7M7 87.00 81.00 94.00 11M8 78.00 69.00 92.00 11SSI 91.50 82.00 99.00 8RozelR0a 82.00 79.00 95.00 7R0 * * * 0

____________________________________________________________________

Table3.4 Summaryof dissolvedoxygen(%saturation)inJerseystreams(continued)

Site Median Min Max n_VauxdeLecq2200 * * * 0



2201 87.00 86.00 93.00 32201a 65.50 43.00 95.00 42202 82.50 36.00 101.00 102203 89.00 42.00 96.00 92204 94.00 94.00 94.00 12205 71.00 32.00 85.00 92206 37.00 15.00 68.00 52206a * * * 02207 * * * 02208 87.50 63.00 99.00 8Southeastcoastoutfalls11 * * * 0 12 * * * 0 14 * * * 0 15 * * * 0 16 * * * 0 17 * * * 0 18 * * * 0 19 * * * 0 20 * * * 0 21 * * * 0 22 * * * 0 O h SSI'

____________________________________________________________________

Table3.5 Summaryof chemicaloxygendemand(mg/lO2)inJerseystreams

Site Median Min Max n_LonguevilleL0 17 5 27 4



L1 24 1 46 15L2 25 1 27 3L3 27 8 35 16L4 11 1 48 17L5 14 1 50 14L5a 13 2 25 15L5b 18 6 108 15L6 9 1 28 12L7 * * * 0 L8 3 1 19 15SSI 21 7 49 13LaValléedesMouriersM1 19 7 25 5M2 13 10 23 7M3 7 7 7 1 M4 8 0 45 15M5 12 5 28 15M6 18 5 26 11M7 9 3 26 15M8 6 2 19 15SSI 14 3 27 12Rozel

SSI 23 10 44 12



____________________________________________________________________

Table3.5 Summaryof chemicaloxygendemand(mg/lO2)inJerseystreams(continued)

Site Median Min Max n_VauxdeLecq



2200 20 4 39 142201 12 3 22 52201a 23 3 32 92202 22 10 48 152203 20 13 57 172204 17 9 46 72205 22 7 89 172206 15 5 28 112206a 40 40 40 12207 11 10 11 22208 14 7 43 10Southeastcoast outfalls11 22 17 37 612 18 18 29 514 29 14 48 815 * * * 0 16 35 22 160 617 32 17 59 618 25 11 48 619 39 21 62 620 31 15 48 621 18 15 28 4

____________________________________________________________________ Table3.6 Summaryof chlorideconcentrations(mg/lCl)inJerseystreams Site Median Min Max n_LonguevillecatchmentL0 1164 585 2708 4L1 105 95 127 6L2 * * * 0



L2 * * * 0 L3 101 97 107 6L4 92 79 104 6L5 92 87 109 4L5a 95 89 103 7L5b 82 71 86 7 L6 92 86 92 3L7 * * * 0 L8 94 91 99 7SSI 94 70 101 6MourierM1 91 91 91 1M2 92 92 92 1M3 93 93 93 1M4 98 95 101 8M5 89 81 96 8M6 88 86 97 8M7 89 87 93 8M8 90 73 98 8SSI 88 80 95 6RozelcatchmentR0a 77 55 85 7 R0 441 67 467 3

____________________________________________________________________

Table3.6 Summaryof chlorideconcentrations(mg/lCl)inJerseystreams(continued)

Site Median Min Max n_VauxdeLecq2200 110 90 113 52201 110 106 114 2



2201 110 106 114 22201a 100 88 111 22202 105 97 111 72203 105 87 108 72204 98 980 980 12205 103 91 110 72206 104 89 105 32206a * * * 02207 * * * 02208 108 101 113 7Southeastcoastoutfalls11 160 131 189 412 125 123 129 414 164 119 200 415 * * * 0 16 357 186 769 417 333 89 830 318 142 119 363 419 176 139 1240 420 866 649 2334 421 94 90 117 322 250 188 286 3O h SSI'

____________________________________________________________________

Table3.7 Summaryof ammoniumconcentrations(mg/lNH4)inJerseystreams

Site Median Min Max n_LonguevilleL0 0.9130 0.5780 1.8530 5L1 1 1510 0 4430 3 1420 9



L1 1.1510 0.4430 3.1420 9L2 21.7650 21.7650 21.7650 1L3 0.6680 0.2610 1.8980 10L4 0.4842 0.0116 0.8809 11L5 0.4580 0.0120 1.1590 8L5a 0.2010 0.0120 1.6190 11L5b 0.2923 0.0116 0.9285 10L6 0.3310 0.0631 0.6014 6L7 * * * 0 L8 0.3070 0.0120 1.9830 11SSI 0.6310 0.2820 1.2505 9LaValléedesMouriersM1 0.3080 0.2650 0.6880 3M2 0.4330 0.1510 2.4470 5M3 0.0592 0.0592 0.0592 1M4 0.4010 0.0120 4.1350 13M5 0.4550 0.0460 1.7270 13M6 0.2949 0.0837 0.7598 9M7 0.3480 0.0280 1.8220 13M8 0.3630 0.0120 1.4660 13SSI 0.4370 0.0010 1.2030 9Rozel

9SSI 0.6560 0.0120 1.3570



____________________________________________________________________

Table3.7 Summaryof ammoniumconcentrations(mg/lNH4)inJerseystreams(continued)

Site Median Min Max n_VauxdeLecq2200 0.3650 0.0000 1.3640 82201 0 3700 0 0980 0 9130 4



2201 0.3700 0.0980 0.9130 42201a 0.5420 0.1160 0.8630 42202 0.3170 0.0120 1.2350 112203 0.4950 0.1670 1.2630 112204 0.4600 0.2510 0.6700 22205 0.6690 0.3570 3.0770 122206 0.5630 0.3010 1.1680 62206a * * * 02207 0.1249 0.1249 0.1249 12208 0.4450 0.0296 0.7508 10Southeastcoastoutfalls11 3.1530 0.4820 5.4550 612 1.1020 0.4840 3.0740 514 1.8000 0.6300 16.9600 715 * * * 0 16 2.4190 0.9230 3.5720 617 0.5740 0.3050 3.0140 618 0.5220 0.3270 3.2270 519 1.0010 0.5040 3.8090 620 0.7590 0.5160 3.0900 621 0.5070 0.2790 2.9980 422 0.5410 0.1850 2.7680 3

____________________________________________________________________ Table3.8 Summaryof nitrateconcentrations(mg/lNO3)inJerseystreamsSite Median Min Max n_LonguevilleL0 52.68 30.10 59.76 5L1 57.77 29.66 75.26 14L2 * * * 0



L3 63.97 46.04 83.67 14L4 82.78 68.17 116.42 15L5 62.86 11.07 71.71 12L5a 106.24 97.39 119.97 15L5b 88.98 51.35 100.49 15L6 103.14 97.39 107.57 11L7 * * * 0 L8 109.34 100.49 116.87 15SSI 69.94 27.89 81.90 15LaValléedesMouriersM1 121.29 101.37 125.72 5M2 111.56 86.77 126.61 8M3 113.33 113.33 113.33 1M4 104.03 94.73 123.51 15M5 114.21 81.45 126.61 15M6 125.72 119.52 131.48 11M7 121.29 81.45 126.61 15M8 110.67 69.94 123.51 15SSI 114.65 77.47 201.86 15RozelR0a 80.57 34.97 100.49 19R0 64 63 28 77 75 70 8

____________________________________________________________________

Table3.8 Summaryof nitrateconcentrations(mg/lNO3)inJerseystreams(continued)

Site Median Min Max n_VauxdeLecq2200 117.75 90.44 159.36 132201 154.05 131.92 169.10 5



2201 154.05 131.92 169.10 52201a 106.24 85.44 140.77 82202 121.29 83.67 135.46 132203 99.60 20.06 140.77 162204 119.50 31.00 140.80 62205 115.10 79.77 140.77 162206 123.06 112.00 135.46 102206a 121.74 121.74 121.74 12207 115.98 110.67 121.29 22208 159.81 131.92 212.49 10Southeastcoastoutfalls11 633.00 106.00 1124.00 612 57.77 41.17 73.48 614 815.00 193.00 1169.00 715 * * * 0 16 24.60 4.40 99.20 617 41.61 29.22 56.66 618 53.79 48.69 83.67 619 75.70 28.30 96.50 720 44.71 22.58 62.86 721 56.88 41.61 62.86 422 287.70 105.80 345.30 3

____________________________________________________________________ Table3.9 Summaryof nitriteconcentrations(mg/lNO2)inJerseystreamsSite Median Min Max n_LonguevilleL0 0.2956 0.1642 0.4598 5L1 0.2989 0.1971 0.8211 10L2 * * * 0



L3 0.2299 0.0985 0.8211 10L4 0.0657 0.0263 0.1314 11L5 0.0985 0.0460 0.3941 8L5a 0.0985 0.0328 0.4336 11L5b 0.0985 0.0328 0.6898 10L6 0.0985 0.0328 0.1314 6L7 * * * 0 L8 0.0066 0.0033 0.0329 11SSI 0.2300 0.0330 0.9530 9LaValléedesMouriersM1 0.0755 0.0657 0.1031 3M2 0.1640 0.0660 0.6930 5M3 0.0328 0.0328 0.0328 1M4 0.0329 0.0000 0.0759 13M5 0.0434 0.0329 0.1314 13M6 0.0329 0.0329 0.0985 9M7 0.0657 0.0329 0.0985 13M8 0.0657 0.0328 0.2299 13SSI 0.0657 0.0329 0.1051 9RozelR0a 0.1314 0.0657 0.3613 11R0 0 1314 0 0657 0 3285 3

____________________________________________________________________

Table3.9 Summaryof nitriteconcentrations(mg/lNO2)inJerseystreams(continued)

Site Median Min Max n_VauxdeLecq2200 0.0690 0.0000 0.3153 92201 0.0657 0.0329 0.0657 4



2201a 0.2808 0.0328 0.4073 42202 0.0328 0.0230 0.4270 112203 0.2628 0.0328 0.5912 112204 0.4940 0.3940 0.5940 22205 0.6569 0.1971 1.0872 122206 0.8670 0.2300 1.1500 62206a * * * 02207 0.0526 0.0525 0.0526 12208 0.0657 0.0000 0.0985 10Southeastcoastoutfalls11 0.7230 0.1310 3.5470 512 0.4110 0.1970 6.0600 614 0.9400 0.2600 8.7400 615 * * * 0 16 0.4600 0.0330 4.0010 617 0.2956 0.1379 0.5682 518 0.1970 0.0330 1.0310 619 0.2070 0.1640 1.3340 720 0.2529 0.1971 0.6011 721 0.1642 0.1642 0.2956 322 0.2630 0.0660 0.6240 3

____________________________________________________________________

Table3.10 Summaryof ortho-phosphateconcentrations(mg/lP2O5)inJerseystreams

Site Median Min Max n

_LonguevilleL0 0.825 0.504 1.833 5L1 1.512 0.642 2.337 8



L2 * * * 0 L3 0.390 0.046 1.375 8L4 0.687 0.367 2.154 9L5 0.825 0.137 1.375 6L5a 0.504 0.275 1.925 9L5b 0.183 0.092 0.917 9L6 0.412 0.367 0.642 5L7 * * * 0 L8 0.183 0.092 1.146 9SSI 0.917 0.137 2.979 14LaValléedesMouriersM1 0.092 0.092 0.092 1M2 0.321 0.137 0.504 3M3 0.183 0.183 0.183 1M4 0.321 0.183 0.412 11M5 0.412 0.229 0.962 11M6 0.275 0.183 0.825 9M7 0.412 0.183 0.733 11M8 0.458 0.275 0.962 11SSI 0.504 0.321 1.650 14Rozel

SSI 0.687 0.275 2.612 14



____________________________________________________________________

Table3.10 Summaryof ortho-phosphateconcentrations(mg/lP2O5)inJerseystreams(continued)


_VauxdeLecq2200 0.642 0.504 1.283 72201 0.825 0.550 1.146 5

6 5 6 66



2201a 0.962 0.596 1.466 42202 0.549 0.366 1.283 92203 0.824 0.275 1.146 102204 1.054 1.054 1.054 12205 1.008 0.550 2.062 102206 0.733 0.458 1.833 52206a * * * 02207 * * * 02208 0.733 0.504 1.146 10Southeastcoastoutfalls11 20.200 5.600 94.400 612 1.902 1.146 2.704 614 32.100 19.200 172.300 615 * * * 0 16 4.220 1.100 16.960 517 1.329 1.008 2.200 518 0.504 0.321 0.687 519 1.306 0.504 2.795 620 0.596 0.092 1.696 621 0.435 0.092 0.687 422 8.160 3.210 9.990 3

____________________________________________________________________

Table3.11 Summaryof totalphosphateconcentrations(mg/lP)inJerseystreams


_LonguevilleL0 * * * 0 L1 0.2150 0.2000 0.2500 4L2 * * * 0



L2 * * * 0 L3 0.2200 0.1600 0.6900 4L4 0.2500 0.1700 1.6000 4L5 0.1450 0.1000 0.2700 4L5a 0.1450 0.0300 0.1700 4L5b 0.2550 0.1200 1.0300 4L6 0.2650 0.1200 0.3700 4L7 * * * 0 L8 0.0400 0.0200 0.1100 4SSI * * * 0 LaValléedesMouriersM1 0.1000 0.0300 0.1600 3M2 0.0400 0.0300 0.1000 3M3 * * * 0 M4 0.0500 0.0500 0.2100 3M5

0.1100

0.1100

0.1400

3

M6 0.0800 0.0800 0.0800 1M7 0.1100 0.1000 0.1200 3M8 0.0900 0.0600 0.1200 3SSI * * * 0 Rozel

0 0 4050 0 1400 0 6800 6

SSI * * * 0



____________________________________________________________________

Table3.11 Summaryof totalphosphateconcentrations(mg/lP)inJerseystreams(continued)


_VauxdeLecq2200 0.2150 0.1900 0.2400 22201 * * * 02201a 0 0600 0 0600 0 0600 1



2201a 0.0600 0.0600 0.0600 12202 0.1300 0.1000 3.2200 32203 0.2400 0.2400 0.2400 22204 0.1400 0.1400 0.1400 12205 0.3250 0.1900 0.4600 22206 0.1850 0.1100 0.2600 22206a

*

*

*

0

2207 0.0700 0.0700 0.0700 12208 * * * 0Southeastcoastoutfalls11 * * * 0 12 * * * 0 14 2.1400 2.1400 2.1400 115 * * * 0 16 2.3900 2.3900 2.3900 117

0.5100

0.5100

0.5100

1

18 0.7500 0.7500 0.7500 119 0.5100 0.5100 0.5100 120 0.4300 0.4300 0.4300 121 * * * 0 22 * * * 0 O h SSI'

____________________________________________________________________ Table3.12 Summaryof potassiumconcentrations(mg/lK)inJerseystreams Site Median Min Max n_LonguevilleL0

31.00

21.00

50.00

5

L1 15.00 5.00 35.00 12L2 * * * 0 L3 9.00 5.00 10.00 12



L4 11.00 8.00 21.00 13L5 11.00 9.00 14.00 10L5a 4.00 2.00 6.00 13L5b 12.00 7.00 20.00 13L6 8.00 6.00 10.00 9L7 * * * 0 L8 2.00 1.00 3.00 13SSI 10.50 7.00 15.00 14LaValléedesMouriersM1 5.50 3.00 9.00 4M2 7.00 3.00 7.00 6M3 8.00 8.00 8.00 1M4 6.00 3.00 7.00 14M5 8.00 6.00 11.00 14M6 7.50 5.00 13.00 10M7 6.00 4.00 10.00 14M8 6.00 5.00 8.00 14SSI 7.00 6.00 12.00 14RozelR0a 14.00 11.00 18.00 16R0 13 00 11 00 40 00 6

____________________________________________________________________

Table3.12 Summaryof potassiumconcentrations(mg/lK)inJerseystreams(continued)


_Vauxde

Lecq

2200 17.00 14.00 23.00 92201 22.00 14.00 23.00 52201a 14.00 11.00 25.00 5



0 a .00 .00 5.00 5

2202 7.00 6.00 40.00 122203 12.50 6.00 17.00 122204 14.00 13.00 15.00 22205 14.00 11.00 19.00 122206 11.00 9.00 15.00 72206a

*

*

*

0

2207 4.00 4.00 4.00 12208 24.00 21.00 27.00 10Southeastcoastoutfalls11 107.00 46.00 330.00 612 24.00 20.00 26.00 614 200.00 80.00 420.00 715 * * * 0 16 28.50 11.00 61.00 617

27.50

14.00

45.00

6

18 22.00 19.00 34.00 619 28.00 21.00 41.00 720 29.00 14.00 54.00 721 11.50 11.00 17.00 422 47.00 39.00 78.00 3O h SSI'

____________________________________________________________________

Table3.13 Summaryof totalcoliformconcentrations(cfu/100ml)inJerseystreams

GeometricSite mean Min Max n_LonguevilleL0 50582 6306 2000000 5L1 70469 3273 1000000 13



L2 10902 10901 10901 1L3 116413 10991 1520000 13L4 49317 2273 490000 14L5 7261 909 140541 12L5a 12303 818 52727 14L5b

4842

400

96364

14

L6 16255 2793 41818 10L7 * * * 0 L8 11 1 126 14SSI 107647 28182 1090000 10LaValléedesMouriersM1 2188 100 10455 5M2 1276 27 12182 7M3 2000 2000 2000 1M4

1637

171

6455

15

M5 5957 2000 95000 15M6 4140 700 15455 11M7 5200 1018 43000 15M8 4121 410 236000 15SSI 8453 455 800000 11R l

____________________________________________________________________

Table3.13 Summaryof totalcoliformconcentrations(cfu/100ml)inJerseystreams(continued)

GeometricSite mean Min Max n_StPeter'sValleyP1 24774 2909 135135 6P2 5058 800 44545 12



P3 17458 2636 83636 12P3a 10423 4054 56000 3P4 2858 800 16364 12P4a 16181 3636 124545 12P5 9712 2883 27000 11P5a

10423

3000

62727

12

P6 6295 1273 37273 10P7 6318 1091 15455 12P7a 12764 3727 76364 12P8a 10375 2545 40909 12P9 6353 1000 170000 11P9a 6936 3243 23636 10P11 7088 6036 8273 5P12 10641 5182 47273 7P13

20193

6937

45455

11

SSI 35563 9000 127273 11VauxdeLecq2200 13868 4324 360000 122201 7096 3182 40000 62201a 18197 2000 221818 82202 6053 300 91818 13

____________________________________________________________________

Table3.14 Summaryof faecalcoliformconcentrations(cfu/100ml)inJerseystreams

GeometricSite mean Min Max n_LonguevilleL0 2825 676 20000 5L1 3614 509 162000 13



L2 3728 3727 3727 1L3 14622 1909 262000 13L4 2416 469 19000 14L5 489 70 7400 12L5a 794 45 13364 14L5b

90

10

5182

14

L6 3083 173 31000 10L7 * * * 0 L8 2 1 10 14SSI 11272 2342 97273 11LaValléedesMouriersM1 223 10 1441 5M2 144 10 910 7M3 64 64. 64. 1M4

65

10

586

15

M5 861 227 21000 15M6 682 118 5818 11M7 1146 162 35000 15M8 615 91 34000 15SSI 968 391 3546 11R l

____________________________________________________________________

Table3.14 Summaryof faecalcoliformconcentrations(cfu/100ml)inJerseystreams(continued)

GeometricSite mean Min Max n_StPeter'sValleyP1 8811 1109 164000 7P2 1059 391 15909 13



P3 7674 784 30000 13P3a 3312 80 882 3P4 918 255 4545 12P4a 4305 541 18182 13P5 2089 600 5818 11P5a

2685

455

14000

13

P6 944 100 17364 11P7 1413 455 6636 12P7a 4467 928 29000 11P8a 473 100 2909 12P9 1085 396 3091 11P9a 732 264 2455 10P11 1067 164 11000 5P12 1422 255 11727 7P13 3750 676 18364 11SSI 4467 1545 81818 11VauxdeLecq2200 1416 200 42000 122201 453 200 1545 62201a 2443 100 54000 82202 412 0 6909 13

____________________________________________________________________

Table3.15 Summaryof faecalstreptococciconcentrations(cfu/100ml)inJerseystreams

GeometricSite mean Min Max n_LonguevilleL0 352 109 682 5L1 520 91 7100 13L2 345 345 345 1



L2 345 345 345 1L3 577 218 1900 13L4 307 30 5000 14L5 184 18 2591 11L5a 373 20 7100 14L5b

37

10

600

14

L6 773 55 39200 10L7 * * * 0 L8 2 1 10 13SSI 3055 100 512000 10LaValléedesMouriersM1 161 10 918 5M2 59 10 445 7M3 50 50 50 1M4 43 3 700 15M5 286 20 16400 15M6 296 20 1460 11M7 498 55 15106 15M8 254 10 21200 15SSI 656 91 4000 10R l

____________________________________________________________________

Table3.15 Summaryof faecalstreptococciconcentrations(cfu/100ml)inJerseystreams(continued)

GeometricSite mean Min Max n_StPeter'sValleyP1 2089 227 4700 7P2 421 20 14400 13P3 1247 82 27700 13



P3 1247 82 27700 13P3a 254 146 591 3P4 267 20 2000 13P4a 798 100 11000 13P5 521 109 3900 11P5a 511 40 19600 13P6 259 10 8000 11P7 373 110 4000 12P7a 1239 70 45200 12P8a 107 10 1164 12P9 505 100 4500 10P9a 399 80 5500 10P11 387 45 5800 5P12 630 100 5600 7P13 1170 209 5800 11SSI 891 100 4091 10VauxdeLecq2200 826 27 19100 122201 182 30 1109 52201a 1714 100 10000 82202 22 10 3800 13

_______________________________________________________________

Table3.16 Pearsoncorrelations(r )betweenmedianvaluesof waterqualityparameters(PSdandCREHdata)andecologicalindexvaluesfrommacroinvertebrateanalysis

EcologicalIndex Parameter BMWP1

ASPT2

Taxa3

n†

Temperature 0.288* 0.221 0.346* 56pH 0.176 0.264 0.192 56



Conductivity -0.324* -0.259 -0.357* 56DissolvedOxygen 0.425* 0.575* 0.306* 44ChemicalOxygenDemand -0.052 -0.111 -0.022 45Chloride -0.089 -0.202* -0.078 43Ammonium -0.220 -0.297* -0.189 45Nitrate -0.090 -0.152 -0.087 55Nitrite 0.013 -0.268 0.147 44Phosphate -0.108 -0.102 -0.067 43Totalphosphate -0.217 0.030 -0.222 35Potassium 0.064 0.020 0.100 44Totalcoliforms -0.206 -0.515* -0.130 56Faecalcoliforms -0.119 -0.375* -0.032 56Faecalstreptococci 0.119 -0.027 0.168 551BMWP=BiologicalmonitoringWorkingPartyscore2ASPT=AverageScorePerTaxon3Taxa=numberof taxa†n= number of sites * p< 0.05 Table 3 17 Spearman rank correlations bet een DECORANA a is scores

*** p<0.001



_________________________________________________________________

Table3.18 Numbersof sampleswithinpHrangesornotexceedingmaximumadmissiblevaluesspecifiedinECDirectives

pH pH pH pH pHSite 6.5-8.11 5.5-9.02 6.5-8.53 �9.54 6.0-9.05 n*LonguevillecatchmentL0 5 5 5 5 5 5 L1 15 15 15 15 15 15L2 3 3 3 3 3 3

http://slidepdf.com/reader/full/6.5-8.11














L3 14 15 15 15 15 15L4 16 16 16 16 16 16L5 13 14 13 14 13 14L5a 13 15 15 15 15 15 L5b 14 15 14 15 15 15 L6

4

12

4

12

12

12

L7 - - - - - 0 L8 9 15 9 15 15 15SSI 13 14 14 14 14 14All 119 139 123 139 138 139LaValléedesMouriersM1 4 5 4 5 5 5 M2 5 5 5 7 5 7 M3 1 1 1 1 1 1 M4

4

15

4

15

11

15

M5 15 15 15 15 15 15M6 11 11 11 11 11 11M7 15 15 15 15 15 15M8 8 15 8 15 15 15SSI 14 14 14 14 14 14All 77 96 77 98 92 98

_________________________________________________________________

Table3.18 Numbersof sampleswithinpHrangesornotexceedingmaximumadmissiblevaluesspecifiedinECDirectives(continued)

pH pH pH pH pHSite 6.5-8.11 5.5-9.02 6.5-8.53 �9.54 6.0-9.05 n*StPeter'sValleyP1 2 8 2 9 6 9 P2 6 15 6 15 12 15P3 4 15 4 15 13 15















P3a 3 5 3 5 5 5 P4 12 15 12 15 14 15P4a 13 15 13 15 15 15 P5 11 13 11 13 13 13P5a 13 15 13 15 15 15 P6

11 11 11 11 11 11

P7 12 14 12 14 14 14P7a 12 14 12 14 14 14 P8a 14 14 14 14 14 14 P9 13 13 13 13 13 13P9a 12 12 12 12 12 12 P11 7 7 7 7 7 7 P12 7 9 9 9 9 9 P13 14 14 14 14 14 14 SSI 14 14 14 14 14 14All

180

223

182

224

215

224

VauxdeLecq2200 13 14 13 15 14 152201 6 6 6 6 6 62201a 8 10 8 10 10 102202 14 16 14 16 16 16

5 Directive78/659/EECFreshwaterforfishlife,SalmonidandCyprinid,Guide* n=numberof observations



_________________________________________________________________

Table3.19 Numbersof samples�conductivityvaluesspecifiedinECDirectives

Conductivity Conductivity Conductivity Site �1000µS1 �1500µS2 �400µS3 n* LonguevillecatchmentL0 0 0 0 5L1 7 14 0 14L2 3 3 0 3



L3 10 14 0 14L4 15 15 0 15L5 13 13 0 13L5a 14 14 0 14L5b 14 14 0 14L6

11

11

0

11

L7 - - - 0L8 14 14 0 14SSI 13 14 0 14All 114 126 0 131LaValléedesMouriersM1 5 5 0 5M2 7 7 0 7M3 1 1 0 1M4

15

15

0

15

M5 15 15 0 15M6 11 11 0 11M7 15 15 0 15M8 15 15 0 15SSI 14 14 0 14All 98 98 0 98

_________________________________________________________________

Table3.19 Numbersof samples�conductivityvaluesspecifiedinECDirectives(continued)

Conductivity Conductivity ConductivitySite �1000µS1 �1500µS2 �400µS3 n*StPeter'sValleyP1 7 7 0 7P2 13 13 0 13P3 13 13 0 13P3 3 3 0 3



P3a 3 3 0 3P4 13 13 0 13P4a 13 13 0 13P5 11 11 0 11P5a 13 13 0 13P6 11 11 1 11P7 13 13 0 13P7a 13 13 0 13P8a 13 13 0 13P9 11 12 0 12P9a 11 11 0 11P11 6 6 0 6P12 5 5 0 7P13 10 11 0 12SSI 14 14 0 14All 193 195 1 198VauxdeLecq2200 11 11 0 112201 6 6 0 62201a 7 7 0 72202 13 13 0 13

_________________________________________________

Table3.20 Numbersof samples�chemicaloxygendemand(COD)valuesspecifiedinECDirectives

COD CODSite �30mg/lO2

1 �45mg/lO22 n*

LonguevillecatchmentL0 4 4 4L1 13 14 15L2 3 3 3



L3 11 16 16L4 16 16 17L5 13 13 14L5a 15 15 15L5b 10 12 15L6

12

12

12

L7 - - 0L8 15 15 15SSI 10 12 13All 122 132 139LaValléedesMouriersM1 5 5 5M2 7 7 7M3 1 1 1M4 14 15 15M5 15 15 15M6 11 11 11M7 15 15 15M8 15 15 15SSI 12 12 12All 96 96 96

_________________________________________________

Table3.20 Numbersof samples�chemicaloxygendemand(COD)valuesspecifiedinECDirectives(continued)

COD CODSite �30mg/lO2

1 �45mg/lO22 n*

StPeter'sValleyP1 8 9 9P2 12 14 15P3 14 15 15P3 4 4 5



P3a 4 4 5P4 15 15 15P4a 15 15 15P5 12 13 13P5a 14 14 15P6

9 11

11

P7 13 15 15P7a 5 13 15P8a 15 15 15P9 10 12 14P9a 13 13 13P11 6 7 8P12 4 10 10P13 10 13 14SSI 10 12 12All

189

220

229

VauxdeLecq2200 12 14 142201 5 5 52201a 8 9 92202 9 14 15

_________________________________________________________________

Table3.21 Numbersof samples�chlorideconcentrationvaluesspecifiedinECDirectives

Cl Cl Cl Site �200mg/l1 �300mg/l2 �25mg/l3 n* LonguevillecatchmentL0 0 0 0 4 L1 6 6 0 6 L2 - - - 0 L3 6 6 0 6



L3 6 6 0 6 L4 6 6 0 6 L5 4 4 0 4 L5a 7 7 0 7 L5b 7 7 0 7 L6 3 3 0 3 L7 - - - 0 L8 7 7 0 7 SSI 6 6 0 6All 52 52 0 56LaValléedesMouriersM1 1 1 0 1 M2 1 1 0 1 M3 1 1 0 1 M4 8 8 0 8 M5 8 8 0 8 M6 8 8 0 8 M7 8 8 0 8 M8 8 8 0 8 SSI 6 6 0 6All 49 49 0 49

_________________________________________________________________

Table3.21 Numbersof samples�chlorideconcentrationvaluesspecifiedinECDirectives(continued)

Cl Cl ClSite �200mg/l1 �300mg/l2 �25mg/l3 n*StPeter'sValleyP1 2 2 0 2 P2 7 7 0 7 P3 7 7 0 7 P3a 0



P3a - - - 0 P4 7 7 0 7 P4a 7 7 0 7 P5 7 7 0 7 P5a 7 7 0 7 P6

7 7 0 7

P7 7 7 0 7 P7a 7 7 0 7 P8a 7 7 0 7 P9 6 6 0 6 P9a 6 6 0 6 P11 3 3 0 3 P12 2 2 0 3 P13 4 6 0 6 SSI 6 6 0 6All

99

101

0

102

VauxdeLecq2200 5 5 0 52201 2 2 0 22201a 2 2 0 22202 7 7 0 7

_______________________________________________________________________________________________________________________________

Table 3.22 Numbers of samples !ammonium concentration values specified by EC Directives

NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 Site !0.04mg/l1 !0.05mg/l2 !0.075mg/l3 !0.2mg/l4 !0.5mg/l5 !1.0mg/l6 !1.5mg/l7 !2.0mg/l8 !2.25mg/l9 !3.0mg/l10

!4.0mg/l11!6.0mg/l12

n* Longueville catchmentL0 0 0 0 0 0 2 3 5 5 5 5 5 5

L1 0 0 0 0 0 3 6 6 7 8 9 9 9

L2 0 0 0 0 0 0 0 0 0 0 0 0 1

L3 0 0 0 0 2 8 8 10 10 10 10 10 10

L4 0 0 0 1 5 11 11 11 11 11 11 11 11

L5 0 0 0 1 3 7 8 8 8 8 8 8 8

L5a 0 0 0 2 7 10 10 11 11 11 11 11 11

L5b 1 1 1 2 8 10 10 10 10 10 10 10 10

L6 0 0 0 1 4 6 6 6 6 6 6 6 6L7 - - - - - - - - - - - - 0

L8 0 0 0 1 8 10 10 10 11 11 11 11 11

SSI 0 0 0 0 1 8 9 9 9 9 9 9 9

All 1 1 1 8 38 75 81 86 88 89 90 90 91

1 Directive 78/659/EEC Fresh water for fish life, Salmonid, Guide2 Directive 75/440/EEC Drinking water abstraction A1 Guide and



2 Directive 75/440/EEC Drinking water abstraction, A1, Guideand

Directive 80/778/EEC Water for human consumption, Guide3 Directive 75/440/EEC Drinking water abstraction, A1, Guide+ 50%

4 Directive 78/659/EEC Fresh water for fish life, Cyprinid, Guide5 Directive 80/778/EEC Water for human consumption, MAC


Directive 78/659/EEC Fresh water for fish life, Salmonid and Cyprinid, Imperative7 Directive 75/440/EEC Drinking water abstraction, A2, Imperativeand

Directive 75/440/EEC Drinking water abstraction, A2, Guide+ 50%

8 Directive 75/440/EEC Drinking water abstraction, A3, Guide9 Directive 75/440/EEC Drinking water abstraction, A2, Imperative+ 50%

10 Directive 75/440/EEC Drinking water abstraction, A3, Guide+ 50%

11 Directive 75/440/EEC Drinking water abstraction, A3, Imperative12 Directive 75/440/EEC Drinking water abstraction, A3, Imperative+ 50%

* n= number of observations

_______________________________________________________________________________________________________________________________

Table 3.22 Numbers of samples !ammonium concentration values specified by EC Directives (continued)


!4.0mg/l11!6.0mg/l12

n* La Vallée des MouriersM1 0 0 0 0 2 3 3 3 3 3 3 3 3

M2 0 0 0 1 3 3 4 4 4 5 5 5 5

M3 0 0 1 1 1 1 1 1 1 1 1 1 1

M4 2 2 2 3 7 9 10 12 12 12 12 13 13

M5 0 1 2 3 9 12 12 13 13 13 13 13 13

M6 0 0 0 3 7 9 9 9 9 9 9 9 9

M7 1 1 1 5 8 11 12 13 13 13 13 13 13

M8 2 2 2 6 11 11 13 13 13 13 13 13 13

SSI 2 2 2 3 5 8 9 9 9 9 9 9 9All 7 8 10 25 53 67 73 77 77 78 78 79 79

1 Directive 78/659/EEC Fresh water for fish life, Salmonid, Guide2 Directive 75/440/EEC Drinking water abstraction, A1, Guideand


4 Directive 78/659/EEC Fresh water for fish life, Cyprinid, Guide



, yp ,

5 Directive 80/778/EEC Water for human consumption, MAC




8 Directive 75/440/EEC Drinking water abstraction, A3, Guide9 Directive 75/440/EEC Drinking water abstraction, A2, Imperative+ 50%10 Directive 75/440/EEC Drinking water abstraction, A3, Guide+ 50%



______________________________________________________________________________________________________________________________



!4.0mg/l11!6.0mg/l12

n* _Rozel catchmentR0a 1 1 1 3 6 10 10 11 11 11 11 11 11

R0 0 0 0 0 1 1 2 2 3 3 3 3 3

R1 1 1 1 1 5 9 10 11 11 11 11 11 11

R2 1 1 1 3 6 9 11 12 12 12 12 12 12

R3 2 2 2 3 5 9 10 10 10 10 10 10 11

R3a - - - - - - - - - - - - 0

R3b - - - - - - - - - - - - 0

R3c - - - - - - - - - - - - 0R3d - - - - - - - - - - - - 0

R3e - - - - - - - - - - - - 0

R3f - - - - - - - - - - - - 0

R4 2 2 2 4 7 12 12 12 12 12 12 12 12

R5 2 2 2 3 6 11 11 12 12 12 12 12 12

SSI 1 1 1 2 7 9 9 9 9 9 9 9 9



All 10 10 10 19 43 70 75 79 80 80 80 80 81



4 Directive 78/659/EEC Fresh water for fish life, Cyprinid, Guide5 Directive 80/778/EEC Water for human consumption, MAC6 Directive 75/440/EEC Drinking water abstraction, A2, Guideand







______________________________________________________________________________________________________________________________



!4.0mg/l11!6.0mg/l12

n* _St Peter's ValleyP1 0 0 0 1 1 1 2 2 2 2 2 2 3

P2 1 1 1 3 5 7 8 8 8 8 8 8 8

P3 0 0 0 0 4 5 6 6 8 8 9 9 9

P3a - - - - - - - - - - - - 0

P4 2 2 2 3 7 9 9 9 9 9 9 9 9

P4a 1 2 2 2 6 7 9 9 9 9 9 9 9

P5 0 0 0 2 6 8 8 8 8 8 8 8 8

P5a 2 2 2 2 8 9 9 9 9 9 9 9 9P6 0 0 0 2 7 9 9 9 9 9 9 9 9

P7 0 0 0 1 5 9 9 9 9 9 9 9 9

P7a 1 1 1 1 6 7 9 9 9 9 9 9 9

P8a 3 3 3 3 5 7 8 9 9 9 9 9 9

P9 1 1 1 1 5 8 8 8 8 8 8 8 8

P9a 0 0 0 2 5 6 7 7 7 7 7 7 7



P11 0 0 0 0 0 2 2 2 2 2 2 2 3

P12 0 0 1 1 1 3 4 4 4 4 4 4 4

P13 0 0 1 1 5 8 8 8 8 8 8 8 8

SSI 1 1 1 3 4 7 9 9 9 9 9 9 9

All 12 13 15 28 80 112 124 125 127 127 128 128 130











______________________________________________________________________________________________________________________________



!4.0mg/l11!6.0mg/l12

n* _Vaux de Lecq2200 3 3 3 3 6 6 8 8 8 8 8 8 8

2201 0 0 0 1 3 4 4 4 4 4 4 4 4

2201a 0 0 0 1 2 4 4 4 4 4 4 4 4

2202 3 3 3 3 8 10 11 11 11 11 11 11 11

2203 0 0 0 1 6 9 11 11 11 11 11 11 11

2204 0 0 0 0 1 2 2 2 2 2 2 2 2

2205 0 0 0 0 3 9 11 11 11 11 12 12 12

2206 0 0 0 0 3 5 6 6 6 6 6 6 62206a - - - - - - - - - - - - 0

2207 0 0 0 1 1 1 1 1 1 1 1 1 1

2208 1 2 2 2 6 10 10 10 10 10 10 10 10

All 7 8 8 12 39 60 69 69 69 69 69 69 69













______________________________________________________________________________________________________________________________



!4.0mg/l11!6.0mg/l12

n* _South east coast outfalls11 0 0 0 0 1 2 2 2 2 3 4 6 6

12 0 0 0 0 1 1 4 4 4 4 5 5 5

14 0 0 0 0 0 2 3 5 5 5 6 6 7

15 - - - - - - - - - - - - 0

16 0 0 0 0 0 1 1 2 3 4 6 6 6

17 0 0 0 0 2 5 5 5 5 5 6 6 6

18 0 0 0 0 2 4 4 4 4 4 5 5 5

19 0 0 0 0 0 3 5 5 5 5 6 6 620 0 0 0 0 0 4 5 5 5 5 6 6 6

21 0 0 0 0 2 3 3 3 3 4 4 4 4

22 0 0 0 1 1 2 2 2 2 3 3 3 3

All 0 0 0 1 9 27 34 37 38 42 51 53 54













______________________________________________________________________________________________________________________________


NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4 NH4Site !0.04mg/l1 !0.05mg/l2 !0.075mg/l3 !0.2mg/l4 !0.5mg/l5 !1.0mg/l6 !1.5mg/l7 !2.0mg/l8 !2.25mg/l9 !3.0mg/l10

!4.0mg/l11!6.0mg/l12

n*

_Other SSI'sGrouville 0 0 0 3 3 7 9 9 9 9 9 9 9

Grands Vaux 1 2 3 3 5 8 9 9 9 9 9 9 9

Millbrook 1 1 1 4 4 6 7 9 9 9 9 9 9

Pres D 'Auvergne 1 2 3 3 8 9 9 9 9 9 9 9 9

Vallée des V aux 1 1 1 2 5 9 9 9 9 9 9 9 9

All 4 6 8 15 25 39 43 45 45 45 45 45 45





Directive 78/659/EEC Fresh water for fish life, Salmonid and Cyprinid, Imperative7 Di i 75/440/EEC D i ki b i A2 I i d



7 Directive 75/440/EEC Drinking water abstraction, A2, Imperativeand




11 Directive 75/440/EEC Drinking water abstraction, A3, Imperative12 Directive 75/440/EEC Drinking water abstraction, A3, Imperative+ 50%* n= number of observations

________________________________________________________________

Table3.23 Numbersof samples�nitrateconcentrationvaluesspecifiedinECDirectives

NO3 NO3 NO3 NO3 Site �25mg/l1 �37.5mg/l2 �50mg/l3 �75mg/l4

n* LonguevillecatchmentL0 0 1 1 5 5 L1 0 2 5 13 14L2 - - - - 0 L3 0 0 1 12 14L4 0 0 0 4 15



L4 0 0 0 4 15 L5 1 1 1 12 12L5a 0 0 0 0 15L5b 0 0 0 1 15L6 0 0 0 0 11 L7 - - - - 0 L8 0 0 0 0 15 SSI 0 1 4 11 15All 1 5 12 58 131 LaValléedesMouriersM1 0 0 0 0 5 M2 0 0 0 0 8 M3 0 0 0 0 1 M4 0 0 0 0 15 M5 0 0 0 0 15 M6 0 0 0 0 11 M7 0 0 0 0 15 M8 0 0 0 1 15 SSI 0 0 0 0 15 All 0 0 0 1 100

________________________________________________________________

Table3.23 Numbersof samples�nitrateconcentrationvaluesspecifiedinECDirectives(continued)

NO3 NO3 NO3 NO3Site �25mg/l1 �37.5mg/l2 �50mg/l3 �75mg/l4

n*StPeter'sValleyP1 1 1 2 8 8 P2 0 1 3 14 14P3 0 0 2 9 14 P3a 4 4 4 4 4 P4 0 0 1 12 14



P4 0 0 1 12 14P4a 0 0 0 2 14P5 0 0 2 9 12 P5a 0 0 2 5 14P6 0 0 0 3 11 P7 0 0 2 9 14 P7a 0 0 0 3 14P8a 0 0 0 3 14P9 0 1 1 10 13P9a 0 1 2 10 12P11 0 0 0 5 7 P12 3 3 3 7 9 P13 1 2 2 10 13SSI 0 0 3 13 15All 9 13 29 136 216VauxdeLecq2200 0 0 0 0 132201 0 0 0 0 52201a 0 0 0 0 82202 0 0 0 0 13

Directive80/778/EECWaterforhumanconsumption,MAC4 Directive75/440/EECDrinkingwaterabstraction, Imperative+ 50% * n=numberof observations



________________________________________________________________

Table3.24 Numbersof samples�nitriteconcentrationvaluesspecifiedinECDirectives

NO2 NO2 NO2 Site �0.1mg/l1 �0.01mg/l2 �0.03mg/l3

n* LonguevillecatchmentL0 0 0 0 5 L1 0 0 0 10 L2 - - - 0 L3 1 0 0 10 L4 10 0 2 11



L4 10 0 2 11L5 4 0 0 8 L5a 8 0 0 11 L5b 6 0 1 10 L6 4 0 0 6 L7 0 0 0 0 L8 11 6 6 11SSI 2 0 0 9All 46 6 9 91LaValléedesMouriersM1 2 0 0 3 M2 1 0 0 5 M3 1 0 0 1 M4 13 4 4 13M5 11 0 0 13M6 9 0 0 9 M7 13 0 0 13M8 11 0 0 13SSI 8 0 0 9All 69 4 4 79

________________________________________________________________

Table3.24 Numbersof samples�nitriteconcentrationvaluesspecifiedinECDirectives(continued)

NO2 NO2 NO2Site �0.1mg/l1 �0.01mg/l2 �0.03mg/l3

n*StPeter'sValleyP1 1 0 0 3 P2 4 0 0 9 P3 0 0 0 9 P3a - - - 0 P4 6 0 0 9



P4 6 0 0 9 P4a 1 0 0 9 P5 2 0 0 8 P5a 5 0 0 9 P6 4 1 1 9 P7 3 0 0 9 P7a 9 0 0 9 P8a 9 1 2 9 P9 5 0 0 8 P9a 7 0 0 7 P11 2 0 0 3 P12 1 0 0 4 P13 5 0 0 8 SSI 7 0 0 9All 71 2 3 131VauxdeLecq2200 5 1 1 92201 4 0 0 42201a 1 0 0 42202 9 0 2 11

_________________________________________________________________________

Table3.25 Numbersof samples�phosphateconcentrationvaluesspecifiedinECDirectives

P2O5 P2O5 P2O5 P2O5 P2O5Site �0.4mg/l1 �0.6mg/l2 �0.7mg/l3 �1.05mg/l4 �5.0mg/l5

n*LonguevillecatchmentL0 0 0 1 3 5 5 L1 0 0 0 1 8 8 L2 - - - - - 0 L3 4 4 7 7 8 8 L4 0 2 3 7 9 9



L5 2 2 2 3 6 6 L5a 1 4 7 8 9 9L5b 8 8 8 9 9 9L6 0 3 4 5 5 5 L7 - - - - - 0 L8 8 8 8 8 9 9 SSI 1 2 2 7 14 14 All 24 33 42 58 82 82 LaValléedesMouriersM1 1 1 1 1 1 1 M2 2 3 3 3 3 3 M3 1 1 1 1 1 1 M4 9 11 11 11 11 11M5 5 9 9 11 11 11M6 7 8 8 9 9 9 M7 5 10 10 11 11 11M8 4 9 9 11 11 11SSI 2 12 12 12 14 14All 36 64 64 70 72 72

_________________________________________________________________________

Table3.25 Numbersof samples�phosphateconcentrationvalues specifiedinECDirectives(continued)

P2O5 P2O5 P2O5 P2O5 P2O5Site �0.4mg/l1 �0.6mg/l2 �0.7mg/l3 �1.05mg/l4 �5.0mg/l5

n*StPeter'sValleyP1 0 0 0 0 2 3 P2 3 4 6 8 8 8 P3 3 7 8 8 8 8 P3a - - - - - 0P4 4 7 7 8 8 8



P4a 3 8 8 8 8 8P5 1 3 3 5 7 7 P5a 5 7 8 8 8 8P6 0 0 0 0 1 8 P7 1 3 3 7 9 9 P7a 0 1 1 1 9 9P8a 2 10 10 10 10 10P9 2 6 7 8 9 9 P9a 0 5 6 8 8 8P11 1 2 2 2 3 3P12 1 2 2 3 5 5P13 2 4 5 8 9 9SSI 1 5 7 11 14 14All 29 74 83 103 126 134VauxdeLecq2200 0 3 4 6 7 72201 0 2 2 4 5 52201a 0 1 1 3 4 42202 1 6 6 8 9 9

4 Directive75/440/EECDrinkingwaterabstraction,A2,A3Guide+50%5 Directive80/778/EECWaterforhumanconsumption,MAC* n=numberof observations



_________________________________________________

Table3.26 Numbersof samples�potassiumconcentrationvaluesspecifiedinECDirectives

K KSite 10mg/l1 12mg/l2

n*LonguevillecatchmentL0 0 0 5 L1 3 5 12 L2 - - 0 L3 9 12 12 L4 4 9 13 L5 1 6 10



L5 1 6 10 L5a 13 13 13 L5b 3 7 13 L6 8 9 9 L7 - - 0 L8 13 13 13 SSI 5 9 14 All 59 83 114 MouriercatchmentM1 4 4 4

M4 14 14 14 M5 13 14 14 M7 14 14 14 M8 14 14 14 SSI 13 14 14

M2 6 6 6 M3 1 1 1

M6 9 9 10

All 88 90 91

_________________________________________________

Table3.26 Numbersof samples�potassiumconcentrationvaluesspecifiedinECDirectives(continued)

K KSite 10mg/l1 12mg/l2

n*StPeter'sValleyP1 1 4 6 P2 12 12 12 P3 11 12 12 P3a 0 0 2 P4 11 12 12 P4a 1 12 12



P8a 1 10 12

P4a 1 12 12 P5 6 10 10 P5a 1 8 12 P6 1 3 11 P7 1 9 12 P7a 0 1 12 P9 7 10 11 P9a 6 10 10 P11 0 2 5 P12 0 1 7 P13 3 8 11 SSI 5 11 14 All 67 135 183 VauxdeLecq2200 0 0 9 2201 0 0 5 2201a 0 1 5 2202 8 10 12



_________________________________________________________________________________________________________________________________

Table 3.27 Numbers of samples !faecal indicator concentration values specified in EC Directives

Total coliforms Faecal coliforms Faecal streptococci

Site 50/100ml1 5000/100ml2 50000/100ml3 n* 20/100ml1 2000/100ml2 20000/100ml3 n* 20/100ml1 1000/100ml2 10000/100ml3 n*

Longueville catchment

L0 0 0 4 5 0 2 5 5 0 5 5 5

L1 0 2 7 13 0 6 11 13 0 11 13 13

L2 0 0 1 1 0 0 1 1 0 1 1 1

L3 0 0 4 13 0 1 8 13 0 11 13 13

L4 0 1 6 14 0 6 14 14 0 12 14 14

L5 0 4 11 12 0 10 12 12 1 8 11 11

L5a 0 3 13 14 0 11 14 14 1 9 14 14

L5b 0 9 13 14 5 13 14 14 8 14 14 14

L6 0 1 10 10 0 4 9 10 0 7 8 10

L7 - - - 0 - - - 0 - - - 0L8 11 14 14 14 14 14 14 14 13 13 13 13

SSI 0 0 4 10 0 0 8 11 0 3 9 10

All 11 34 87 120 19 67 110 121 23 94 115 118

La Vallée des MouriersM1 0 4 5 5 1 5 5 5 1 5 5 5

M2 1 6 7 7 2 7 7 7 2 7 7 7

M3 0 1 1 1 0 1 1 1 0 1 1 1



M3 0 1 1 1 0 1 1 1 0 1 1 1

M4 0 14 15 15 4 15 15 15 6 15 15 15

M5 0 10 13 15 0 13 14 15 1 12 14 15

M6 0 6 11 11 0 10 11 11 1 8 11 11

M7 0 9 15 15 0 12 14 15 0 10 14 15

M8 0 10 14 15 0 13 14 15 1 12 14 15SSI 0 4 10 11 0 8 11 11 0 7 10 10

All 1 64 91 95 7 84 92 95 12 77 91 94

1 Directive 75/440/EEC Drinking water abstraction, A1, Guide




_________________________________________________________________________________________________________________________________

Table 3.27 Numbers of samples !faecal indicator concentration values specified in EC Directives (continued)



Rozel catchment

R0a 0 1 9 17 0 6 14 18 1 9 13 15

R0 0 3 7 7 0 5 7 7 0 5 5 6

R1 0 8 17 18 0 15 17 18 1 12 15 15

R2 0 9 18 19 0 10 18 19 2 11 14 16

R3 0 6 11 13 0 7 12 13 0 8 11 13

R3a 0 1 1 1 0 1 1 1 - - - 0

R3b 0 2 3 4 0 3 4 4 1 2 3 3

R3c 0 0 1 1 0 1 1 1 0 0 0 0

R3d 0 0 0 1 0 0 1 1 0 0 1 1

R3e 0 2 3 4 0 3 4 4 0 3 3 3R3f 0 2 4 4 0 3 4 4 1 2 3 3

R4 0 8 14 14 0 11 14 14 2 11 14 14

R5 0 7 14 14 0 11 14 14 2 8 13 13

SSI 0 4 10 10 0 6 11 11 0 7 9 10

All 0 53 112 127 0 82 122 129 10 78 104 112

St Peter's ValleyP1 0 1 4 6 0 2 5 7 0 1 7 7



P1 0 1 4 6 0 2 5 7 0 1 7 7

P2 0 6 12 12 0 11 13 13 1 10 12 13

P3 0 2 10 12 0 4 9 13 0 5 11 13

P3a 0 2 2 3 0 3 3 3 0 3 3 3

P4 0 10 12 12 0 10 12 12 1 11 13 13

P4a 0 2 11 12 0 3 13 13 0 7 12 13P5 0 1 11 11 0 5 11 11 0 7 11 11

P5a 0 3 11 12 0 6 13 13 0 11 12 13

P6 0 4 10 10 0 8 11 11 1 9 11 11

P7 0 5 12 12 0 9 12 12 0 10 12 12

P7a 0 1 11 12 0 2 10 11 0 4 10 12

P8a 0 4 12 12 0 11 12 12 3 11 12 12

P9 0 6 10 11 0 9 11 11 0 8 10 10

P9a 0 4 10 10 0 9 10 10 0 8 10 10

P11 0 0 5 5 0 3 5 5 0 4 5 5

P12 0 0 7 7 0 4 7 7 0 5 7 7

P13 0 0 11 11 0 2 11 11 0 6 11 11

SSI 0 0 7 11 0 2 10 11 0 5 10 10

All 0 51 168 181 0 103 178 186 6 125 179 186







_________________________________________________________________________________________________________________________________

Table 3.27 Numbers of samples !faecal indicator concentration values specified in EC Directives (continued)



Vaux de Lecq

2200 0 6 10 12 0 8 11 12 0 6 11 12

2201 0 4 6 6 0 6 6 6 0 4 5 5

2201a 0 2 6 8 0 5 7 8 0 2 8 8

2202 0 6 12 13 0 10 13 13 2 9 13 13

2203 0 3 13 15 0 8 14 15 0 7 13 15

2204 0 1 4 4 0 3 4 4 0 2 4 4

2205 0 0 9 15 0 0 9 15 0 1 9 15

2206 0 2 8 10 0 4 9 10 2 6 8 10

2206a 0 0 1 1 0 0 1 1 0 1 1 1

2207 0 0 1 1 0 0 1 1 0 0 1 12208 0 7 10 10 0 10 10 10 1 8 8 10

All 0 31 80 95 0 54 85 95 5 46 81 94

South east coast outfalls11 0 0 2 6 0 2 2 6 0 2 5 6

12 0 0 3 6 0 4 4 6 1 5 5 6

14 0 0 5 12 0 5 9 12 0 6 9 10

15 0 0 1 1 0 1 1 1 0 0 1 1



16 0 3 6 11 0 6 8 11 0 5 6 9

17 0 2 5 8 0 5 6 8 0 4 7 8

18 0 5 6 8 0 7 7 8 1 7 7 8

19 0 2 7 9 0 5 8 9 0 6 8 9

20 0 0 6 9 0 2 6 9 0 2 8 921 0 0 5 5 0 2 5 5 0 3 5 5

22 0 5 6 6 1 6 6 6 1 4 4 4

All 0 17 52 81 1 45 62 81 3 44 65 75

Other SSI'sGrouville 0 2 9 10 0 2 8 11 0 1 8 10

Grands Vaux 0 4 9 10 0 4 11 11 0 5 10 10

Millbrook 0 1 7 11 0 3 8 11 0 4 8 10

Pres D'Auvergne 0 1 7 11 0 5 10 11 0 6 8 10

Vallée d es V aux 0 0 9 10 0 0 10 11 0 0 6 10

All 0 8 41 52 0 14 47 55 0 16 40 50





___________________________________________________________________________________________________________________________________________________________________________________

Table 4.1 Summary of water quality data for stream catchments monitored on the island of Jersey

Longueville La Vallée des Mouriers Rozel St Peter's Valley Vaux de Lecq South east coast outfalls Other SSI's All

Parameter median min max median min max median min max median min max median min max median min max median min max median min max

General Parameters

Temperature (˚C)

pH

Conductivity (µS)

DO (mg/l O2)

13.000

7.140

887.000

71.000

3.100

5.830

468.000

6.660

22.400

8.330

9009.000

122.000

12.500

6.790

731.000

88.000

5.700

5.940

548.000

69.000

20.600

9.350

963.000

105.000

11.500

7.210

581.500

87.000

4.000

5.640

37.100

72.000

20.300

10.040

1869.000

102.000

13.600

7.080

666.000

86.000

4.600

5.370

7.600

6.000

23.900

8.680

2810.000

138.000

11.600

7.000

791.000

81.000

5.200

5.280

593.000

15.000

17.000

7.760

951.000

101.000

11.800

7.440

1670.000

-.-

5.000

6.710

10.000

-.-

18.700

8.390

112400.000

-.-

13.500

7.260

637.000

90.500

7.400

5.790

330.000

56.000

20.900

8.080

3980.000

104.000

12.800

7.110

729.000

86.000

3.100

5.280

7.600

6.000

23.900

10.040

112400.000

138.000

COD (mg/l O2)

Chloride (mg/l)

14.000

95.000

1.000

70.000

108.000

2708.000

12.000

90.000

0.000

73.000

45.000

101.000

19.500

71.000

1.000

49.000

80.000

467.000

18.000

83.500

0.000

61.000

104.000

10253.000

20.000

105.000

3.000

87.000

89.000

114.000

28.000

178.000

11.000

89.000

160.000

2334.000

22.000

74.000

6.000

53.000

49.000

129.000

18.000

90.000

0.000

49.000

160.000

10253.000

Nutrients

Ammonium (mg/l)

Nitrate (mg/l)

Nitrite (mg/l)

Phosphate (mg/l)

Total phosphate (mg/l)

Potassium (mg/l)

0.474

80.130

0.099

0.573

0.200

9.000

0.012

11.070

0.003

0.046

0.020

1.000

21.765

119.970

0.953

2.979

1.600

50.000

0.348

115.320

0.059

0.390

0.100

7.000

0.001

69.940

0.000

0.092

0.030

3.000

4.135

201.860

0.693

1.650

0.210

13.000

0.486

56.660

0.066

0.642

0.150

11.000

0.001

4.870

0.000

0.138

0.060

4.000

10.627

256.750

1.774

4.170

0.810

47.000

0.393

70.160

0.099

0.550

0.220

11.000

0.001

0.440

0.000

0.138

0.040

2.000

7.902

131.920

2.365

22.914

3.880

300.000

0.469

121.290

0.197

0.779

0.190

14.000

0.000

20.060

0.000

0.275

0.060

4.000

3.077

212.490

1.150

2.0622

3.220

40.000

1.001

58.400

0.338

1.700

0.630

29.500

0.185

4.400

0.033

0.090

0.430

11.000

16.958

1168.700

8.737

172.311

2.390

420.000

0.484

58.880

0.131

0.733

-.-

13.000

0.001

22.130

0.033

0.000

-.-

3.000

1.678

165.120

0.591

4.125

-.-

45.000

0.474

75.700

0.099

0.596

0.180

11.000

0.000

0.440

0.000

0.000

0.020

1.000

21.765

1168.670

8.737

172.311

3.880

420.000

Faecal indicator organisms (cfu/100ml)

Parameter GM* min max GM* min max GM* min max GM* min max GM* min max GM* min max GM* min max GM* min max

Total coliforms 11000 1 2000000 3700 27 800000 8700 270 10400000 10000 800 170000 12000 300 730000 28000 360 18900000 23000 1000 640000 11000 1 18900000

Faecal coliforms 820 1 260000 450 10 35000 1200 36 3000000 1900 80 160000 1700 50 110000 2200 10 1000000 5200 300 100000 1400 1 3000000

Faecal streptococci 20 0 1 510000 210 3 21000 430 10 82000 530 10 45200 960 10 76000 730 10 52000 23 00 173 51000 480 1 510000



Faecal streptococci 20 0 1 510000 210 3 21000 430 10 82000 530 10 45200 960 10 76000 730 10 52000 23 00 173 51000 480 1 510000

Notes: * GM = Geometric mean, numbers of samples (n) as per Table 4.2 and Tables 3.1, 3.4 and 3.11 for additional parameters (temperature, DO and total phosphate)

___________________________________________________________________________________________________________________________________________________________________________________

Table 4.2 Summary of samples from Jersey streams passing a range of EC Directive criteria for surface waters

Parameter/ Longueville La Vallée des Mouriers Rozel St Peter's Valley Vaux de Lecq South east coast outfalls Other SSI's All

Standard pass n % pass pass n % pass pass n % pass pass n % pass pass n % pass pass n % pass pass n % pass pass n % pass

_pHAbstraction A1 G 119 139 85.61 77 98 78.57

Abstraction A2/A3 G 139 139 100.00 96 9 8 97.96

Human Consumption G 123 139 88.49 77 98 78.57

Human Consumption MAC 139 139 100.00 98 98 100.00

Fish life G 139 139 100.00 92 9 8 93.88

119

136

119

136

133

137

137

137

137

137

86.86

99.27

86.86

99.27

97.08

180

223

182

224

215

224

224

224

224

224

80.36

99.55

81.25

100.00

95.98

93

115

93

116

109

116

116

116

116

116

80.17

99.14

80.17

100.00

93.97

65

67

67

67

67

67

67

67

67

67

97.01

100.00

100.00

100.00

100.00

64

70

64

70

69

70

70

70

70

70

91.43

100.00

91.43

100.00

98.57

717

846

725

850

824

851

851

851

851

851

84.25

99.41

85.19

99.88

96.83

ConductivityAbstraction G 114 131 8 7.02 98 9 8 100.00

Human Consumption G 0 131 0.00 0 98 0.00

Chemical Oxygen DemandAbstraction A3 G 122 139 8 7.77 96 9 6 100.00

101

3

112

114

114

128

88.60

2.63

87.50

193

1

189

198

198

229

97.47

0.51

82.53

89

0

90

89

89

108

100.00

0.00

83.33

9

3

35

54

54

57

16.67

5.56

61.40

67

1

52

70

70

64

95.71

1.43

81.25

671

8

696

754

754

821

88.99

1.06

84.77

ChlorideAbstraction G 52 56 9 2.86 4 9 49 100.00

Human Consumption G 0 56 0 .00 0 49 0 .00

AmmoniumFish life Salmonid G 1 91 1 .10 7 79 8 .86

Abstr. A1 G/ Hu. Con. G 1 91 1.10 8 79 10.13

Fish life Cyprinid G 8 91 8.79 25 79 31.65


Abstr. A2 G / Fish life I 75 91 82.42 67 79 84.81

Abstraction A2 I 81 91 89.01 73 79 92.41

Abstraction A3 G 86 91 94.51 77 79 97.47

Abstraction A3 I 90 91 98.90 78 79 98.73

53

0

10

10

19

43

70

75

79

80

55

55

81

81

81

81

81

81

81

81

96.36

0.00

12.35

12.35

23.46

53.09

86.42

92.59

97.53

98.77

99

0

12

13

28

80

112

124

125

128

102

102

130

130

130

130

130

130

130

130

97.06

0.00

9.23

10.00

21.54

61.54

86.15

95.38

96.15

98.46

41

0

7

8

12

39

60

69

69

69

41

41

69

69

69

69

69

69

69

69

100.00

0.00

10.14

11.59

17.39

56.52

86.96

100.00

100.00

100.00

24

0

0

0

1

9

27

34

37

51

37

37

54

54

54

54

54

54

54

54

64.86

0.00

0.00

0.00

1.85

16.67

50.00

62.96

68.52

94.44

30

0

4

6

15

25

39

43

45

45

30

30

45

45

45

45

45

45

45

45

100.00

0.00

8.89

13.33

33.33

55.56

86.67

95.56

100.00

100.00

348

0

41

46

108

287

450

499

518

541

370

370

549

549

549

549

549

549

549

549

94.05

0.00

7.47

8.38

19.67

52.28

81.97

90.89

94.35

98.54

NitrateAbstr. A1 G / Hu. Con. G 1 131 0.76 0 100 0.00

Abstr. I / Hu. Con. MAC 12 131 9.16 0 100 0.00

NitriteHuman Consumption MAC 46 91 50 55 69 79 87 34

4

45

64

138

138

81

2.90

32.61

79 01

9

29

71

216

216

131

4.17

13.43

54 20

1

2

32

100

100

70

1.00

2.00

45 71

4

21

4

58

58

54

6.90

36.21

7 41

2

21

17

75

75

45

2.67

28.00

37 78

21

130

303

818

818

551

2.57

15.89

54 99




Fish life Salmonid G 6 91 6 .59 4 79 5 .06

Fish life Cyprinid G 9 91 9 .89 4 79 5 .06

PhosphateAbstr. A1 G / Hu. Con. G 24 82 29.27 36 72 50.00

Abstraction A2, A3 G 42 82 51.22 64 72 88.89


PotassiumHuman Consumption G 59 114 51.75 88 91 96.70


Total coliformsAbstraction A1 G 11 120 9.17 1 95 1.05

Abstraction A2 G 34 120 28.33 64 95 67.37

Abstraction A3 G 87 120 72.50 91 95 95.79

64

3

8

15

48

80

45

89

0

53

112

81

81

81

80

80

80

121

121

127

127

127

79.01

3.70

9.88

18.75

60.00

100.00

37.19

73.55

0.00

41.73

88.19

71

2

3

29

83

126

67

135

0

51

168

131

131

131

134

134

134

183

183

181

181

181

54.20

1.53

2.29

21.64

61.94

94.03

36.61

73.77

0.00

108.18

92.82

32

2

4

2

24

61

15

26

0

31

80

70

70

70

61

61

61

75

75

95

95

95

45.71

2.86

5.71

3.28

39.34

100.00

20.00

34.67

0.00

32.63

84.21

4

0

0

6

15

36

0

4

0

17

52

54

54

54

52

52

52

58

58

81

81

81

7.41

0.00

0.00

11.54

28.85

69.23

0.00

6.90

0.00

20.99

64.20

17

0

0

14

34

70

21

32

0

8

41

45

45

45

70

70

70

72

72

52

52

52

37.78

0.00

0.00

20.00

48.57

100.00

29.17

44.44

0.00

15.38

78.85

303

17

28

126

310

527

295

459

12

258

631

551

551

551

551

551

551

714

714

751

751

751

54.99

3.09

5.08

22.87

56.26

95.64

41.32

64.29

1.60

34.35

84.02

Faecal coliformsAbstraction A1 G 19 121 15.70 7 95 7.37

Abstraction A2 G 67 121 55.37 84 95 88.42

Abstraction A3 G 110 121 90.91 92 95 96.84

0

82

122

129

129

129

0.00

63.57

94.57

0

103

178

186

186

186

0.00

55.38

95.70

0

54

85

95

95

95

0.00

56.84

89.47

1

45

62

81

81

81

1.23

55.56

76.54

0

14

47

55

55

55

0.00

25.45

85.45

27

449

696

762

762

762

3.54

58.92

91.34

Faecal streptococciAbstraction A1 G 23 118 19.49 12 94 12.77

Abstraction A2 G 94 118 79.66 77 94 81.91

Abstraction A3 G 115 118 97.46 91 94 96.81

Notes: G = Guide, I = Imperative, MAC = Maximum Admissible Concentration

10

78

104

112

112

112

8.93

69.64

92.86

6

125

179

186

186

186

3.23

67.20

96.24

5

46

81

94

94

94

5.32

48.94

86.17

3

44

65

75

75

75

4.00

58.67

86.67

0

16

40

50

50

50

0.00

32.00

80.00

59

480

675

729

729

729

8.09

65.84

92.59

Documents

R Stream Water Quality Report