Over or under? Autonomous sensor fish reveals why overshot weirs may be safer than undershot weirs for fish passage

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dc.contributor.authorPflugrath, Brett D.en
dc.contributor.authorBoys, Craig A.en
dc.contributor.authorCathers, Bruceen
dc.contributor.authorDeng, Zhiqun Danielen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2019-08-13T12:50:16Zen
dc.date.available2019-08-13T12:50:16Zen
dc.date.issued2019-07en
dc.description.abstractMany riverine fish species disperse downstream as eggs, juveniles, or adults, which can expose them to injury and death at hydraulic structures. Low-head weirs are one example of a structure that can kill fish, and this impact has been shown to be substantially higher for undershot weirs when compared to overshot weirs. In this study, autonomous sensor devices were released at an overshot and undershot weir under similar discharges to assess what stressors maybe contributing to differences in the survival rates of fish. Although the undershot weir was more likely to expose fish to rapid decompression, the intensity of decompression was mild and it is more likely that higher levels of fluid shear at the undershot are more damaging to early life stage and small-bodied fish. Both weirs showed potential for strike, but this could be managed through improvements in design.en
dc.description.notesPublic domain – authored by a U.S. government employeeen
dc.identifier.doihttps://doi.org/10.1016/j.ecoleng.2019.03.010en
dc.identifier.eissn1872-6992en
dc.identifier.issn0925-8574en
dc.identifier.urihttp://hdl.handle.net/10919/93040en
dc.identifier.volume132en
dc.language.isoenen
dc.rightsCreative Commons CC0 1.0 Universal Public Domain Dedicationen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjectWeiren
dc.subjectOvershoten
dc.subjectUndershoten
dc.subjectSluice gateen
dc.subjectFish passageen
dc.subjectStrikeen
dc.subjectShearen
dc.subjectDecompressionen
dc.titleOver or under? Autonomous sensor fish reveals why overshot weirs may be safer than undershot weirs for fish passageen
dc.title.serialEcological Engineeringen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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