Vymezení a typologie vodních útvarů

povrchových vod

Josef K. Fuksa, T.G.M. Water Research Institute, Prague

MKOL/IKSE, Dresden, 4 MAR 2005

Flussgebietseinheit – Oblast povodí – R.B.D. (Labe/Elbe):

Main unit for management of river basins

WB – a coherent subunit in the RBD to which the environmental objectives must apply.

Main purpose of identifying WBs is to enable the status to be accurately described and compared to Objectives.

Water body - WFD 2 (10):

”Body of surface water” means a

discrete and significant element

of surface water…

"Oberflachenwasserkörper": ein

einheitlicher und bedeutender Abschnitt

”Útvar povrchové vody” je

vymezitelný a významný prvek …..

UPSTREAM

DOWNSTREAM

Number of river WBs River Basin District Elbe, Czech Rep.:

Area: WB Rivers: WB Lakes: WB Salties:BRD+CR 147108 No of WBs 3438 482 4

BRD 97175 2838 432 4CR 49933 600 50 0

Mean area BRD 34,2 km*2of a river WB basin: CR 83,2 km*2

Typology of WBs:

Find type reference conditions.

Compare the status.

Express ecol. status as EQR.

Define Objectives.

Set Measures.

Control the success (R.B.M.P.).

Typology in CR:

Related to WBs.

System A + ammendments:

Altitude 200-500, 500-800 m.

Strahler order (4 - 8).

Numerical code (ecoregion 9)

Lakes = HMWBs.

Czech typology – example:

WB 1465300: Labe between Bilina and Hrensko – type 41148:

4 Ecoregion: 9

1 Altitude: < 200 m

1 Geology: Si

4 Basin area: >10 000 km*2

8 Strahler Order: 8

Typology in BRD - Steckbriefe:Related to rivers / river types.Based on System „B“.Descriptors from System „A“: Ecoregion (9, 14 + non-ecoregion). Geology. Catchment area. Other characteristics

(phys. chemistry, biology).

Specific items of typology

BRD: Bottom substrate.

CR: Strahler Order

(at the closing profile of the WB).

Polska: Strahler Order.

Österreich: Combined typology.

Number of types:

BRD: 19 types (+ Si/Ca branching).

CR: 22 types with > 5 WBs,

covering 95% of river WBs.

Boundary WBs:

Simple „A“ typology could be used.

Good WB status upstream = an important condition for

good WB status downstream