Author(s): Anders G. Andersson; Eric Lillberg; Robin L. Andersson And J. Gunnar I. Hellstrom
Linked Author(s): Robin Andersson, Anders Andersson, Gunnar Hellström
Keywords: Hydraulic simulations CFD ADCP Validation Environmental impact Downstream migration
Abstract: Numerical simulations and field measurements have been performed to evaluate the hydraulic function of a large pump system used to create a guiding stream for downstream migrating fish passing the intake at a hydropower plant. The numerical model was used to find the best location and direction of the system and the field measurements performed with an Acoustic Doppler Current Profiler were then used to validate the function of the pumping system as well as the accuracy of the numerical model. Initial qualitative analysis shows that the guiding stream generated by the pump is clearly noticeable within the main stream and should therefore have an effect on fish migration. Future work includes quantitative validation of the numerical model and combining the simulated flow fields with fish tracks measured during the downstream migrating season to evaluate the effectiveness of the pump as a mitigation technique.
Year: 2025