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dc.contributor.author
Moldenhauer-Roth, Anita
dc.contributor.author
Selz, Oliver M.
dc.contributor.author
Unterberger, Felix
dc.contributor.author
Albayrak, Ismail
dc.contributor.author
Boes, Robert
dc.contributor.editor
Ortega-Sánchez, Miguel
dc.date.accessioned
2022-09-19T14:01:47Z
dc.date.available
2022-07-29T16:58:47Z
dc.date.available
2022-08-02T06:23:03Z
dc.date.available
2022-08-23T09:22:06Z
dc.date.available
2022-08-23T09:23:36Z
dc.date.available
2022-09-19T14:01:47Z
dc.date.issued
2022-07
dc.identifier.isbn
978-90-832612-1-8
en_US
dc.identifier.other
10.3850/IAHR-39WC25217119202292
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/560946
dc.identifier.doi
10.3929/ethz-b-000560946
dc.description.abstract
Downstream moving fish may have to pass through turbines or spillways of run-of-river hydropower plants (HPPs), which can result in life-threatening injuries. Fish guidance structures such as a vertical curved-bar rack (CBR) or horizontal bar rack (HBR) in combination with a bypass can safely guide different fish species around HPPs, thereby providing a safe downstream fish passage route. HBRs are a physical barrier to the passage of parts of the fish fauna due to narrow bar spacings and partly induce behavioral guidance, while the CBR creates turbulent structures in front of the rack, inducing a behavioral guidance and protection effect. HBRs are mainly applied at small- to medium-scale HPPs because of their velocity limitation and narrow bar spacing causing clogging problems. Combining an HBR with a low voltage electric field (e-HBR) may permit the use of larger bar spacings while maintaining high protection efficiencies. A CBR with a 50 mm bar spacing showed high protection rates for certain cyprinid species in laboratory experiments. However, European eel (Anguilla anguilla) were less receptive to hydraulic cues by the CBR resulting in low guidance efficiency. Electrifying the CBR (e-CBR) may improve the protection efficiency for eel. In the present study, the electric field generated at an e-HBR and e-CBR was numerically simulated. Subsequently, tests of e-HBR and e- BR were conducted with European eel in a large laboratory flume at ETH Zurich. Both e-HBR and e-CBR improved protection and guidance compared to the non – electrified racks for European eel. Guidance and protection efficiencies were not affected by the approach flow velocity varying from 0.15 m/s to 0.6 m/s.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Association for Hydro-Environment Engineering and Research
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
fish downstream migration
en_US
dc.subject
Fish protection
en_US
dc.subject
fish behavior
en_US
dc.subject
Electrified horizontal bar rack
en_US
dc.subject
Electrified curved bar rack
en_US
dc.title
Development of Low-Voltage Electrified Fish Guidance Racks for Safe Downstream Fish Migration
en_US
dc.type
Conference Paper
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2022-07-27
ethz.book.title
Proceedings 39th IAHR World Congress
en_US
ethz.pages.start
1256
en_US
ethz.pages.end
1265
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.event
39th IAHR World Congress: From Snow to Sea
en_US
ethz.event.location
Granada, Spain
en_US
ethz.event.date
June 19–24, 2022
ethz.publication.place
Madrid
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::03820 - Boes, Robert / Boes, Robert
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::03820 - Boes, Robert / Boes, Robert
en_US
ethz.date.deposited
2022-07-29T16:58:54Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2022-08-23T09:22:14Z
ethz.rosetta.lastUpdated
2024-02-02T18:17:56Z
ethz.rosetta.versionExported
true
ethz.COinS
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