Downstream Fish Passage Technologies for Medium-To-Large Hydropower Plants: Part II ...

• Main Authors: Albayrak, Ismail, Beck, Claudia, Kriewitz-Byun, Carl R., Doessegger, Andreas, Boes, Robert
• Format: Text
• Language: English
• Published: ETH Zurich 2019
• Subjects: Fish passage; Fish guidance structure; Downstream fish migration; DML
• Online Access: https://dx.doi.org/10.3929/ethz-b-000341761; http://hdl.handle.net/20.500.11850/341761

Hydropower plants (HPPs) can block or delay fish migration and cause fish injuries or mortalities during the turbine passage. As a consequence, fish populations in many fresh water systems decline. Mechanical and behavioral Fish Guidance Structures (FGS) with vertical bars and large bar spacing are effective solutions to protect and guide downstream migrating fish at water intakes of medium-to-large HPPs (Bates & Vinsonhaler, 1957; Electric Power Research Institute [EPRI] & Dominion Millstone Laboratories [DML], 2001; Amaral et al., 2001 and Boes & Albayrak, 2017). However, the current design of such FGSs, namely louvers, angled bar racks and modified bar racks (MBR) leads to high head losses and unfavorable upstream and downstream flow fields, which are critical factors for their successful implementation at HPPs. In the scope of the EU Horizon 2020 research project “Fishfriendly Innovative Technologies for hydropower” (FIThydro), we have developed two innovative curved-bar shapes for FGSs, ...