Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks
International audience Restoring the longitudinal connectivity of rivers is becoming a conservation priority in countries with high hydroelectric plant (HEP) development. Newly designed downstream passage solutions for fish are being installed in small and medium-sized HEPs in France, and an accurat...
Published in: | Ecological Engineering |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2018
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Online Access: | https://hal.science/hal-02134713 https://hal.science/hal-02134713/document https://hal.science/hal-02134713/file/Tomanova_23794.pdf https://doi.org/10.1016/j.ecoleng.2018.07.034 |
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ftunivnantes:oai:HAL:hal-02134713v1 2023-05-15T15:32:51+02:00 Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks Tomanova, Sylvie Courret, Dominique Alric, Alain de Oliveira, Eric Lagarrigue, Thierry Tétard, Stéphane Institut de mécanique des fluides de Toulouse (IMFT) Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées EDF (EDF) Etudes et Conseils en Gestion de l'Environnement Aquatique - ECOGEA (FRANCE) 2018-10-15 https://hal.science/hal-02134713 https://hal.science/hal-02134713/document https://hal.science/hal-02134713/file/Tomanova_23794.pdf https://doi.org/10.1016/j.ecoleng.2018.07.034 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecoleng.2018.07.034 hal-02134713 https://hal.science/hal-02134713 https://hal.science/hal-02134713/document https://hal.science/hal-02134713/file/Tomanova_23794.pdf doi:10.1016/j.ecoleng.2018.07.034 OATAO: 23794 info:eu-repo/semantics/OpenAccess ISSN: 0925-8574 EISSN: 1872-6992 Ecological Engineering https://hal.science/hal-02134713 Ecological Engineering, 2018, 122, pp.143-152. ⟨10.1016/j.ecoleng.2018.07.034⟩ Hydropower Fish protection Downstream passage solution River connectivity [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] info:eu-repo/semantics/article Journal articles 2018 ftunivnantes https://doi.org/10.1016/j.ecoleng.2018.07.034 2023-02-22T08:07:50Z International audience Restoring the longitudinal connectivity of rivers is becoming a conservation priority in countries with high hydroelectric plant (HEP) development. Newly designed downstream passage solutions for fish are being installed in small and medium-sized HEPs in France, and an accurate evaluation of their functionality is needed. Here we addressed the efficiency of protection systems for the downstream migration of Atlantic salmon smolts at four HEPs (three 26° horizontally inclined racks and one 15° oriented to the flow rack in the bank alignment, all with 20 mm spaced bars). Between 239 and 300 hatchery-reared salmon smolts were PIT-tagged and released in 5–6 groups 100 m upstream of each studied HEP. Their passages through the HEPs were detected with radio frequency identification (RFID) antenna in the bypasses for downstream migration and the fish passes for upstream migration. On average between 82.8% and 92.3% of released smolts successfully passed the HEP through one of the two non-turbine routes. Resulting mean bypass passage efficiency ranged from 80.9 to 87.5% and all fish groups reached over 70% passage efficiency. Excepting one site, 50% of smolts passed through the bypass in less than 23 min after release, and 75% of them in less than 2 h 15 min. Combining our findings with previously estimated fish entrainment rates into the intake channel and turbine-related mortality rates, we assessed the overall fish survivals at the studied dam/HEPs which are between 98.24% and near 100%. Our results confirm recommended design criteria for inclined and oriented racks and the interest of the tested devices for the protection of downstream migrating salmon smolts. Article in Journal/Newspaper Atlantic salmon Université de Nantes: HAL-UNIV-NANTES Ecological Engineering 122 143 152 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Hydropower Fish protection Downstream passage solution River connectivity [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] |
spellingShingle |
Hydropower Fish protection Downstream passage solution River connectivity [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] Tomanova, Sylvie Courret, Dominique Alric, Alain de Oliveira, Eric Lagarrigue, Thierry Tétard, Stéphane Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
topic_facet |
Hydropower Fish protection Downstream passage solution River connectivity [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] |
description |
International audience Restoring the longitudinal connectivity of rivers is becoming a conservation priority in countries with high hydroelectric plant (HEP) development. Newly designed downstream passage solutions for fish are being installed in small and medium-sized HEPs in France, and an accurate evaluation of their functionality is needed. Here we addressed the efficiency of protection systems for the downstream migration of Atlantic salmon smolts at four HEPs (three 26° horizontally inclined racks and one 15° oriented to the flow rack in the bank alignment, all with 20 mm spaced bars). Between 239 and 300 hatchery-reared salmon smolts were PIT-tagged and released in 5–6 groups 100 m upstream of each studied HEP. Their passages through the HEPs were detected with radio frequency identification (RFID) antenna in the bypasses for downstream migration and the fish passes for upstream migration. On average between 82.8% and 92.3% of released smolts successfully passed the HEP through one of the two non-turbine routes. Resulting mean bypass passage efficiency ranged from 80.9 to 87.5% and all fish groups reached over 70% passage efficiency. Excepting one site, 50% of smolts passed through the bypass in less than 23 min after release, and 75% of them in less than 2 h 15 min. Combining our findings with previously estimated fish entrainment rates into the intake channel and turbine-related mortality rates, we assessed the overall fish survivals at the studied dam/HEPs which are between 98.24% and near 100%. Our results confirm recommended design criteria for inclined and oriented racks and the interest of the tested devices for the protection of downstream migrating salmon smolts. |
author2 |
Institut de mécanique des fluides de Toulouse (IMFT) Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées EDF (EDF) Etudes et Conseils en Gestion de l'Environnement Aquatique - ECOGEA (FRANCE) |
format |
Article in Journal/Newspaper |
author |
Tomanova, Sylvie Courret, Dominique Alric, Alain de Oliveira, Eric Lagarrigue, Thierry Tétard, Stéphane |
author_facet |
Tomanova, Sylvie Courret, Dominique Alric, Alain de Oliveira, Eric Lagarrigue, Thierry Tétard, Stéphane |
author_sort |
Tomanova, Sylvie |
title |
Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
title_short |
Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
title_full |
Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
title_fullStr |
Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
title_full_unstemmed |
Protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
title_sort |
protecting efficiently sea-migrating salmon smolts from entering hydropower plant turbines with inclined or oriented low bar spacing racks |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02134713 https://hal.science/hal-02134713/document https://hal.science/hal-02134713/file/Tomanova_23794.pdf https://doi.org/10.1016/j.ecoleng.2018.07.034 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
ISSN: 0925-8574 EISSN: 1872-6992 Ecological Engineering https://hal.science/hal-02134713 Ecological Engineering, 2018, 122, pp.143-152. ⟨10.1016/j.ecoleng.2018.07.034⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecoleng.2018.07.034 hal-02134713 https://hal.science/hal-02134713 https://hal.science/hal-02134713/document https://hal.science/hal-02134713/file/Tomanova_23794.pdf doi:10.1016/j.ecoleng.2018.07.034 OATAO: 23794 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.ecoleng.2018.07.034 |
container_title |
Ecological Engineering |
container_volume |
122 |
container_start_page |
143 |
op_container_end_page |
152 |
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1766363326820909056 |