Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river
National audience Three experiments were conducted from 1996 to 1998 at the Camon hydroelectric powerhouse water intake, on the Garonne river, to test the efficiency of a surface downstream bypass for atlantic salmon smolts. This bypass was built into the trashrack itself at its left edge. The effic...
Main Authors: | , , |
---|---|
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | French |
Published: |
HAL CCSD
1999
|
Subjects: | |
Online Access: | https://hal.inrae.fr/hal-02578681 |
id |
ftccsdartic:oai:HAL:hal-02578681v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-02578681v1 2023-05-15T15:32:17+02:00 Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river Efficacité d'un exutoire de dévalaison pour smolts de saumon atlantique (Salmo salar L.) et comportement des poissons au niveau de l'aménagement hydroélectrique de Camon sur la Garonne Croze, O. Chanseau, M. Larinier, M. Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Ressources aquatiques continentales (UR RABX) 1999 https://hal.inrae.fr/hal-02578681 fr fre HAL CCSD hal-02578681 https://hal.inrae.fr/hal-02578681 IRSTEA: PUB00007479 Bulletin Francais De La Peche Et De La Pisciculture https://hal.inrae.fr/hal-02578681 Bulletin Francais De La Peche Et De La Pisciculture, 1999, pp.121-140 CSP CEMAGREF GHAAPPE AQUITAINE GARONNE COURS D'EAU CAMON [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 1999 ftccsdartic 2021-11-21T00:51:39Z National audience Three experiments were conducted from 1996 to 1998 at the Camon hydroelectric powerhouse water intake, on the Garonne river, to test the efficiency of a surface downstream bypass for atlantic salmon smolts. This bypass was built into the trashrack itself at its left edge. The efficiency of the device was evaluated using the mark-recapture method. Smolt behavior in the intake canal was studied using radiotelemetry technique. In 1996, the bypass efficiency was low (34 %). Radiotracking showed that the bypass location was not responsible for its low efficiency, fish being listened most of the time in the vicinity of the bypass. Nevertheless, an unstable upwelling hided the device entrance. After installing submerged horizontal screen and plates upstream bypass entrance gate, the average efficiency increased to 73 %. Good hydraulic conditions in the intake canal and good local hydrodynamic in the vicinity of the bypass entrance are essential to obtain a satisfactory downstream bypass efficiency. Intermittent nocturnal lighting has an effect on smolt behavior in the intake canal by maintaining fish in directly lighted areas and on the rhythm of fish entry in the bypass, more fish being captured during the first part of the lighting off period. The catching of 7,715 wild salmonids has permitted to study downstream migration rhythms at dam. Daily downstream migration peaks seems to be linked with high water discharge and/or an increase of water temperature. Moreover, downstream migration activity at a dam appears to be mainly nocturnal. Trois expérimentations ont été conduites de 1996 à 1998 au niveau de la prise d'eau de l'usine hydroélectrique de Camon, sur la Garonne, de manière à tester l'efficacité d'un exutoire de surface destiné aux smolts de saumon atlantique. Ce dispositif de dévalaison est situé en rive gauche, au niveau du plan des grilles. Son efficacité a été évaluée par la méthode de marquage-recapture et le comportement des smolts dans le canal d'amenée a été suivi grâce à la ... Article in Journal/Newspaper Atlantic salmon Salmo salar Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Gauche ENVELOPE(-62.500,-62.500,-64.233,-64.233) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
CSP CEMAGREF GHAAPPE AQUITAINE GARONNE COURS D'EAU CAMON [SDE]Environmental Sciences |
spellingShingle |
CSP CEMAGREF GHAAPPE AQUITAINE GARONNE COURS D'EAU CAMON [SDE]Environmental Sciences Croze, O. Chanseau, M. Larinier, M. Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river |
topic_facet |
CSP CEMAGREF GHAAPPE AQUITAINE GARONNE COURS D'EAU CAMON [SDE]Environmental Sciences |
description |
National audience Three experiments were conducted from 1996 to 1998 at the Camon hydroelectric powerhouse water intake, on the Garonne river, to test the efficiency of a surface downstream bypass for atlantic salmon smolts. This bypass was built into the trashrack itself at its left edge. The efficiency of the device was evaluated using the mark-recapture method. Smolt behavior in the intake canal was studied using radiotelemetry technique. In 1996, the bypass efficiency was low (34 %). Radiotracking showed that the bypass location was not responsible for its low efficiency, fish being listened most of the time in the vicinity of the bypass. Nevertheless, an unstable upwelling hided the device entrance. After installing submerged horizontal screen and plates upstream bypass entrance gate, the average efficiency increased to 73 %. Good hydraulic conditions in the intake canal and good local hydrodynamic in the vicinity of the bypass entrance are essential to obtain a satisfactory downstream bypass efficiency. Intermittent nocturnal lighting has an effect on smolt behavior in the intake canal by maintaining fish in directly lighted areas and on the rhythm of fish entry in the bypass, more fish being captured during the first part of the lighting off period. The catching of 7,715 wild salmonids has permitted to study downstream migration rhythms at dam. Daily downstream migration peaks seems to be linked with high water discharge and/or an increase of water temperature. Moreover, downstream migration activity at a dam appears to be mainly nocturnal. Trois expérimentations ont été conduites de 1996 à 1998 au niveau de la prise d'eau de l'usine hydroélectrique de Camon, sur la Garonne, de manière à tester l'efficacité d'un exutoire de surface destiné aux smolts de saumon atlantique. Ce dispositif de dévalaison est situé en rive gauche, au niveau du plan des grilles. Son efficacité a été évaluée par la méthode de marquage-recapture et le comportement des smolts dans le canal d'amenée a été suivi grâce à la ... |
author2 |
Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Ressources aquatiques continentales (UR RABX) |
format |
Article in Journal/Newspaper |
author |
Croze, O. Chanseau, M. Larinier, M. |
author_facet |
Croze, O. Chanseau, M. Larinier, M. |
author_sort |
Croze, O. |
title |
Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river |
title_short |
Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river |
title_full |
Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river |
title_fullStr |
Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river |
title_full_unstemmed |
Efficiency of a downstream bypass for Atlantic salmon (Salmo salar L.) smolts and fish behaviour at the Camon hydroelectric powerhouse water intake on the Garonne river |
title_sort |
efficiency of a downstream bypass for atlantic salmon (salmo salar l.) smolts and fish behaviour at the camon hydroelectric powerhouse water intake on the garonne river |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.inrae.fr/hal-02578681 |
long_lat |
ENVELOPE(-62.500,-62.500,-64.233,-64.233) |
geographic |
Gauche |
geographic_facet |
Gauche |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Bulletin Francais De La Peche Et De La Pisciculture https://hal.inrae.fr/hal-02578681 Bulletin Francais De La Peche Et De La Pisciculture, 1999, pp.121-140 |
op_relation |
hal-02578681 https://hal.inrae.fr/hal-02578681 IRSTEA: PUB00007479 |
_version_ |
1766362793434415104 |