Downstream migration 2021: release of smolts to measure the effectiveness of solutions
Release of young salmon equipped with transmitters at the Jambes bridge in Namur on 31/03/2021. As they travel down the Meuse, their detection by the network of telemetric beacons on the various Luminus sites will make it possible to verify the effectiveness of the protection measures currently being tested: outlet installed on the Luminus site at Grands-Malades and water waves maintained on the dam at Ramet and Monsin.
Passage of fish through the turbines
Profish has developed a technique to measure the impact of turbines on salmon smolts and European silver eels during downstream migration. These studies allow the teams to understand more precisely the real issues and to find solutions to improve ecological continuity in the Meuse.
To know the passages taken by Atlantic salmon smolts and European silver eels during downstream migration, acoustic transmitters are placed in the fish. The data collected by receivers installed near the dams allow Profish teams to draw up a map representing the routes taken. This information will make it possible to create crossing structures.
ULiège laboratory presentation
The University of Liège carried out hydraulic modelling of the hydropower plants of Grands Malades and Ivoz Ramet. These physical and numerical models enable to characterize flow conditions close to the plants and then to design downstream passage structures better suited to the species targeted by the project.
Webinar : Insights about turbine impacts and evaluation of some mitigation measures
Dams associated with hydroelectric power plants (HPP) disrupt river connectivity and affect fish movement and survival. Several studies determine the impact of HPP in terms of fish survival and damage. However, little information is available on their impact regarding the ability of fish to continue to migrate. The LIFE4FISH project aims at assessing this mid-term impact on fish migration and further evaluates in-situ the efficiency of some mitigation measures. First results were presented in this webinar.
The webinair took place on Friday 13 November 2020