Adam, B. and U. Schwevers (1998).  Positioning fish migration facilities - 
behavioural investigations on fish in a hydraulic flume. Wasser und Boden.  
50:55-58.
	
We investigated typical behavioural patterns of rhithral fish in a hydraulic 
flume (18 m x 1,5 m x 1 m deep), in order to determine how fish migration 
facilities should best be installed. By comparing different discharges and 
various entrance locations of a simulated fishway, we found that the most 
effective position for the entrance is parallel to the tailwater flow and 
directly at the obstacle. In contrast, entrances at right-angles to the flow can 
hardly be found by the fish. On their way upstream, they pass the zone of 
turbulence and assemble immediately in front of the migration barrier.