publication . Conference object . 2016

Describing fish passage in a river confluence with telemetry and CFD

Andersson, Anders; Leonardsson, Kjell; Lindberg, Dan-Erik; Lundström, Staffan; Hellström, Gunnar; Lundqvist, Hans;
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  • Published: 07 Feb 2016
  • Country: Sweden
Abstract
The confluence between hydropower tailrace and the old river bed in Stornorrfors in the river Umeälven in the northern part of Sweden has shown to be the largest obstacle for upstream migrating salmon and sea trout during the migrating season. Fish are attracted to the high flow rate from the tailrace and will not migrate upstream in the old river bed being the passage to the fishway leading past the hydropower dam. By triangulating the movements of radio tagged fish using eight antennas in the confluence, it is here possible to describe the individual fish tracks left by radio tagged fish during the migrating season. These tracks are then compared with three-di...
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