Location
Groningen, The Netherlands
Event Website
http://fishpassage.umass.edu/
Start Date
23-6-2015 4:45 PM
End Date
23-6-2015 5:00 PM
Description
Abstract:
The European eel stock collapsed in the 1980’s and is still declining gradually. The main causes of this decline are known: fishing, water and habitat quality, river fragmentation and hydropower plants (HPP) impacts. The European Union (EU) council established a management plan in 2004 and a regulation was initiated (European Regulation CE n°1100/2007) in September 2007 to improve the recovery of the European eel stock. To reach restoration goals, France is engaged in a management plan to act on each of the factors suspected to cause the decline of the species. Concerning the effects of river fragmentation and HPP, a research and development program was initiated in 2009 with several partners. This program, managed by a committee made up of ONEMA, IRSTEA, EDF and other power utilities, has resulted in the development and testing of technical solutions. Fourteen research and development actions have been conducted during 3 years (some of them are still ongoing) and focussed on 2 main themes: blockage of juveniles during their upstream migration and mortalities of adults (silver eel) in the turbines during their downstream migration. By example, the efficiency of different upstream passage devices (i.e., brush type eel pass and other types of passes) have been evaluated. Fish friendly intake criteria have been defined and turbine management experiences have been conducted. Moreover, tools available for the diagnosis of the HPP impacts, turbine mortality and escapement evaluation have been tested and performed. This presentation shows the main results of this program and some operational solutions that have been conducted since.
Session D6: French R&D Program on «Eel and Dams» Related to EU Regulation 1100/2007
Groningen, The Netherlands
Abstract:
The European eel stock collapsed in the 1980’s and is still declining gradually. The main causes of this decline are known: fishing, water and habitat quality, river fragmentation and hydropower plants (HPP) impacts. The European Union (EU) council established a management plan in 2004 and a regulation was initiated (European Regulation CE n°1100/2007) in September 2007 to improve the recovery of the European eel stock. To reach restoration goals, France is engaged in a management plan to act on each of the factors suspected to cause the decline of the species. Concerning the effects of river fragmentation and HPP, a research and development program was initiated in 2009 with several partners. This program, managed by a committee made up of ONEMA, IRSTEA, EDF and other power utilities, has resulted in the development and testing of technical solutions. Fourteen research and development actions have been conducted during 3 years (some of them are still ongoing) and focussed on 2 main themes: blockage of juveniles during their upstream migration and mortalities of adults (silver eel) in the turbines during their downstream migration. By example, the efficiency of different upstream passage devices (i.e., brush type eel pass and other types of passes) have been evaluated. Fish friendly intake criteria have been defined and turbine management experiences have been conducted. Moreover, tools available for the diagnosis of the HPP impacts, turbine mortality and escapement evaluation have been tested and performed. This presentation shows the main results of this program and some operational solutions that have been conducted since.
https://scholarworks.umass.edu/fishpassage_conference/2015/June23/32