Location
Groningen, The Netherlands
Event Website
http://fishpassage.umass.edu/
Start Date
24-6-2015 5:15 PM
End Date
24-6-2015 5:40 PM
Description
Abstract:
Applying various conventional and modern monitoring methods a function control of downstream migration facilities and turbine passage related mortality was conducted at the Kostheim Hydro Plant (4,9 MW; two Kaplan turbines; Δh max. 3,74 m, at MQ 2,36 m) at the river Main (km 3,2). Furthermore, the perceptibility and passability of a nature-like bypass for upstream migration was examined. Results showed a size selectivity of the bypass caused by an unsuitable entrance position 40 m downstream of the outlet of the turbines. The effectiveness of the downstream migration facilities proved to be low, leading to high mortalities at the trashrack and during turbine passage. The vertical bar trashrack with a bar spacing of 20 mm showed little repellent effect and was passed by most fish up to a size of 20-25 cm total length, causing scale loss and haematoma in Atlantic salmon smolts and cyprinid species. Eels smaller than 65 cm were unable to pass the trashrack and the majority was killed by the trashrack cleaning device. Particularly, smaller eels experienced high mortalities at the turbine passage.
Session E9: Function Control of Fish Migration Facilities at the Hydro Power Plant Kostheim at River Main
Groningen, The Netherlands
Abstract:
Applying various conventional and modern monitoring methods a function control of downstream migration facilities and turbine passage related mortality was conducted at the Kostheim Hydro Plant (4,9 MW; two Kaplan turbines; Δh max. 3,74 m, at MQ 2,36 m) at the river Main (km 3,2). Furthermore, the perceptibility and passability of a nature-like bypass for upstream migration was examined. Results showed a size selectivity of the bypass caused by an unsuitable entrance position 40 m downstream of the outlet of the turbines. The effectiveness of the downstream migration facilities proved to be low, leading to high mortalities at the trashrack and during turbine passage. The vertical bar trashrack with a bar spacing of 20 mm showed little repellent effect and was passed by most fish up to a size of 20-25 cm total length, causing scale loss and haematoma in Atlantic salmon smolts and cyprinid species. Eels smaller than 65 cm were unable to pass the trashrack and the majority was killed by the trashrack cleaning device. Particularly, smaller eels experienced high mortalities at the turbine passage.
https://scholarworks.umass.edu/fishpassage_conference/2015/June24/29
Comments
Presenting Author Bio: Born 17/5/1961 in Frankfurt am Main, Germany. Advanced studies and postgraduate studies in biology at the Johann Wolfgang Goethe – University in Frankfurt am Main. 1999 PhD (thesis in salmon ecology). 1993 -1997 research assistant at the Research Institute Senckenberg, Frankfurt am Main; since 1997 freelance biologist (specialized in freshwater fish ecology), founder of the Bureau for Fish-ecological Studies – BFS.