Nick Chisholm

Barriers to fish migration in the River Annan Catchment

Code Easting Northing HeightNatural? Length Width Shape

Depth DS

Depth US

Debris Y/N

M/S flow

Dark Y/N photo passability

ewdk1 302603 606583 0no 9 0.7

round corrugated 0.15 0.02

yes forms dam ds 1.4n yes 1

ewdk2 302589 606562 0.85no 0 1.95 0.03 0.18yes 1.6 yes 3

ewdk3 302574 606614 0.4no 7 0.6round smooth 0.5 0.2

downstream 10m natural no yes 3

ewcf5 302227 606947 ford 1

ewcf6 301937 607053 no 20 0.88

round smooth culvert 0.02 0.11

yes tree blocking culvert 2.2n yes 3

ewcf8 301957 606907 no 10 0.45round smooth 0.08 0.01 no 3

ewbt1 301570 606955 yes

ewcf7 301570 606955 yes

ewcf9 301758 607305 yes

ewcf10 301605 607387 yes

ewcf11 301558 607411 yes

ewcf12 301303 607397 0.18no 15 1.3roundsmooth 0.15 0.02no 1.6n yes 2

ewjd12 301300 607365 0.15 15 1.25round smoth 0.3 0.01 1.6no 2

Criteria Score Score Score

Height<0.4m

1 0.4m-1m 2>1m

3

*Depth on

Barrier>0.1m 1 0.05-0.1m 2 <0.05m 3

Depth D/S>2x deep as

height1

0.25 - 2x deep

as height2 <0.25x height 3

Flow <2m/s 1 >2m/s 3

Barrier Assessment - Criteria for Trout Passage in Small Burns.*Depth of plunge pool downstream only measured on barriers between 0.4 and 1mScore of 1 means passableScore of 2 means passable only under certain flowsScore of 3 means likely to be impassableThe score is the highest single score on the measurements