Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex
Developing management rules to improve downstream migration of salmon smolts in large hydropower plants is essential to limit mortality and migration delay. A 2-year telemetry study was conducted to assess the efficiency of temporary measures to enhance the safety and speed of juvenile salmon passag...
Published in: | Knowledge & Management of Aquatic Ecosystems |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
EDP Sciences
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1051/kmae/2021004 https://doaj.org/article/b767964ba3f240da8df9b0d5626d3931 |
id |
ftdoajarticles:oai:doaj.org/article:b767964ba3f240da8df9b0d5626d3931 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:b767964ba3f240da8df9b0d5626d3931 2023-05-15T15:32:24+02:00 Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex Tétard Stéphane Roy Romain Teichert Nils Rancon Jocelyn Courret Dominique 2021-01-01T00:00:00Z https://doi.org/10.1051/kmae/2021004 https://doaj.org/article/b767964ba3f240da8df9b0d5626d3931 EN eng EDP Sciences https://www.kmae-journal.org/articles/kmae/full_html/2021/01/kmae200141/kmae200141.html https://doaj.org/toc/1961-9502 1961-9502 doi:10.1051/kmae/2021004 https://doaj.org/article/b767964ba3f240da8df9b0d5626d3931 Knowledge and Management of Aquatic Ecosystems, Vol 0, Iss 422, p 4 (2021) atlantic salmon downstream migration migratory delay operational management turbine shutdown Aquaculture. Fisheries. Angling SH1-691 article 2021 ftdoajarticles https://doi.org/10.1051/kmae/2021004 2022-12-31T05:11:25Z Developing management rules to improve downstream migration of salmon smolts in large hydropower plants is essential to limit mortality and migration delay. A 2-year telemetry study was conducted to assess the efficiency of temporary measures to enhance the safety and speed of juvenile salmon passage through the Poutès dam (Allier River, France). 124 smolts were tracked through the reservoir and downstream of the dam, during implementation of turbine modulation and/or shutdown during night and reservoir level lowering. Level lowering significantly reduced median residence time from 3.4 days to 4.4 hours. However, even with high spill during turbine modulation, the risk of smolt being drawn toward the turbines was increased at low reservoir level due to the site's configuration, greater proximity to the surface and weak repulsive effect of the rack. Moreover, results revealed that a substantial proportion of smolts can migrate during daytime and twilight during floods, even at the beginning of the migration period. Thus targeted turbine shutdown has a good potential to protect smolts, but implementation requires studies taking account of site specificities and a flexible approach. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Knowledge & Management of Aquatic Ecosystems 422 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
atlantic salmon downstream migration migratory delay operational management turbine shutdown Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
atlantic salmon downstream migration migratory delay operational management turbine shutdown Aquaculture. Fisheries. Angling SH1-691 Tétard Stéphane Roy Romain Teichert Nils Rancon Jocelyn Courret Dominique Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
topic_facet |
atlantic salmon downstream migration migratory delay operational management turbine shutdown Aquaculture. Fisheries. Angling SH1-691 |
description |
Developing management rules to improve downstream migration of salmon smolts in large hydropower plants is essential to limit mortality and migration delay. A 2-year telemetry study was conducted to assess the efficiency of temporary measures to enhance the safety and speed of juvenile salmon passage through the Poutès dam (Allier River, France). 124 smolts were tracked through the reservoir and downstream of the dam, during implementation of turbine modulation and/or shutdown during night and reservoir level lowering. Level lowering significantly reduced median residence time from 3.4 days to 4.4 hours. However, even with high spill during turbine modulation, the risk of smolt being drawn toward the turbines was increased at low reservoir level due to the site's configuration, greater proximity to the surface and weak repulsive effect of the rack. Moreover, results revealed that a substantial proportion of smolts can migrate during daytime and twilight during floods, even at the beginning of the migration period. Thus targeted turbine shutdown has a good potential to protect smolts, but implementation requires studies taking account of site specificities and a flexible approach. |
format |
Article in Journal/Newspaper |
author |
Tétard Stéphane Roy Romain Teichert Nils Rancon Jocelyn Courret Dominique |
author_facet |
Tétard Stéphane Roy Romain Teichert Nils Rancon Jocelyn Courret Dominique |
author_sort |
Tétard Stéphane |
title |
Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
title_short |
Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
title_full |
Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
title_fullStr |
Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
title_full_unstemmed |
Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
title_sort |
temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex |
publisher |
EDP Sciences |
publishDate |
2021 |
url |
https://doi.org/10.1051/kmae/2021004 https://doaj.org/article/b767964ba3f240da8df9b0d5626d3931 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Knowledge and Management of Aquatic Ecosystems, Vol 0, Iss 422, p 4 (2021) |
op_relation |
https://www.kmae-journal.org/articles/kmae/full_html/2021/01/kmae200141/kmae200141.html https://doaj.org/toc/1961-9502 1961-9502 doi:10.1051/kmae/2021004 https://doaj.org/article/b767964ba3f240da8df9b0d5626d3931 |
op_doi |
https://doi.org/10.1051/kmae/2021004 |
container_title |
Knowledge & Management of Aquatic Ecosystems |
container_issue |
422 |
container_start_page |
4 |
_version_ |
1766362909579935744 |