Talk provided for the annual Scottish Fisheries Co-ordination Centre Meeting. Held at the Scottish Centre for Ecology and the Natural Environment, Loch Lomond. 4th-5th Feb 2015

1. Nick Chisholm
Barriers to fish migration in th
River Annan Catchment

8. Code Easting Northing Height
Natural
? 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
corrugat
ed 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 0.6
round
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 0.45
round
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 1.3
rounds
mooth 0.15 0.02no 1.6n yes 2
ewjd12 301300 607365 0.15 15 1.25
round
smoth 0.3 0.01 1.6no 2

9. 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
height
1
0.25 - 2x deep
as height
2 <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 1m
Score of 1 means passable
Score of 2 means passable only under certain flows
Score of 3 means likely to be impassable
The score is the highest single score on the measurements