Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river
Radiotracking operations conducted in 1995 at the hydroelectric plant of Castetarbe on the Pau River shortly before the dam gave way in November 1995 gave evidence of a large impact of the obstacle on upstream migration of returning adult salmon both in terms of proportions of upstream passages (50%...
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ftccsdartic:oai:HAL:hal-02580505v1 2023-05-15T15:33:05+02:00 Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river Contrôle de l'efficacité du nouveau dispositif de franchissement équipant l'aménagement hydroélectrique EDF de Castetarbe sur le gave de Pau Chanseau, M. Larinier, M. Ressources aquatiques continentales (UR RABX) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) irstea 2001 https://hal.inrae.fr/hal-02580505 fr fre HAL CCSD hal-02580505 https://hal.inrae.fr/hal-02580505 IRSTEA: PUB00010238 https://hal.inrae.fr/hal-02580505 irstea. 2001, pp.7 FRANCE PYRENEES ATLANTIQUES CASTETARBE PAU GAVE [SDE]Environmental Sciences info:eu-repo/semantics/report Reports 2001 ftccsdartic 2021-11-21T00:51:39Z Radiotracking operations conducted in 1995 at the hydroelectric plant of Castetarbe on the Pau River shortly before the dam gave way in November 1995 gave evidence of a large impact of the obstacle on upstream migration of returning adult salmon both in terms of proportions of upstream passages (50%) and migration delays. Such a low upstream passing of the obstacle was partly attributed to (i) the implementation of the fish pass on the left bank in the vicinity of the dam, i.e. on the opposite side from plant turbine discharges and (ii) the fish pass itself, of type Lachadenède, i.e. highly sensitive to variations in upstream water level. At the same time of dam rebuilding, a new upstream fish passage facility of pool-pass type was built on the right bank in the vicinity of the plant and immersed in spring 2000. Radiotracking operations were then proceeding to ascertain the efficiency of this pool fish pass. From July to December 2000, 23 radio-tagged salmon arrived at Castetarbe. All succeeded in passing over the obstacle (23 out of 23, i.e. 100%) with in general short-lived blockade duration (median blockade: 2.1 days; min.: 0.1 day; max.: 77.9 days). Nevertheless, fish pass attractivity was not found optimal as half the fish had to approach to the pool pass entrance up to 15 times (maximum 70 times) before successfully passing over the obstacle. The installation of a simple regulation system main-taining a more or less constant waterfall of about 30 cm at the fish pass entrance would most likely enhance passages over the obstacle so as to make the hydroelectric power plant of Castetarbe nearly transparent to migration and compatible with strategies for restoring Atlantic salmon stocks on the Pau River. Such a decreased impact of Castetarbe plant was all the more important since the obstacle was located on the river well further downstream of major spawning grounds. L'objectif de l'étude était l'évaluation, à l'aide de la technique de radiotélémétrie, de l'efficacité de la nouvelle passe de Castetarbe. De ... Report Atlantic salmon Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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 |
FRANCE PYRENEES ATLANTIQUES CASTETARBE PAU GAVE [SDE]Environmental Sciences |
spellingShingle |
FRANCE PYRENEES ATLANTIQUES CASTETARBE PAU GAVE [SDE]Environmental Sciences Chanseau, M. Larinier, M. Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river |
topic_facet |
FRANCE PYRENEES ATLANTIQUES CASTETARBE PAU GAVE [SDE]Environmental Sciences |
description |
Radiotracking operations conducted in 1995 at the hydroelectric plant of Castetarbe on the Pau River shortly before the dam gave way in November 1995 gave evidence of a large impact of the obstacle on upstream migration of returning adult salmon both in terms of proportions of upstream passages (50%) and migration delays. Such a low upstream passing of the obstacle was partly attributed to (i) the implementation of the fish pass on the left bank in the vicinity of the dam, i.e. on the opposite side from plant turbine discharges and (ii) the fish pass itself, of type Lachadenède, i.e. highly sensitive to variations in upstream water level. At the same time of dam rebuilding, a new upstream fish passage facility of pool-pass type was built on the right bank in the vicinity of the plant and immersed in spring 2000. Radiotracking operations were then proceeding to ascertain the efficiency of this pool fish pass. From July to December 2000, 23 radio-tagged salmon arrived at Castetarbe. All succeeded in passing over the obstacle (23 out of 23, i.e. 100%) with in general short-lived blockade duration (median blockade: 2.1 days; min.: 0.1 day; max.: 77.9 days). Nevertheless, fish pass attractivity was not found optimal as half the fish had to approach to the pool pass entrance up to 15 times (maximum 70 times) before successfully passing over the obstacle. The installation of a simple regulation system main-taining a more or less constant waterfall of about 30 cm at the fish pass entrance would most likely enhance passages over the obstacle so as to make the hydroelectric power plant of Castetarbe nearly transparent to migration and compatible with strategies for restoring Atlantic salmon stocks on the Pau River. Such a decreased impact of Castetarbe plant was all the more important since the obstacle was located on the river well further downstream of major spawning grounds. L'objectif de l'étude était l'évaluation, à l'aide de la technique de radiotélémétrie, de l'efficacité de la nouvelle passe de Castetarbe. De ... |
author2 |
Ressources aquatiques continentales (UR RABX) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) irstea |
format |
Report |
author |
Chanseau, M. Larinier, M. |
author_facet |
Chanseau, M. Larinier, M. |
author_sort |
Chanseau, M. |
title |
Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river |
title_short |
Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river |
title_full |
Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river |
title_fullStr |
Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river |
title_full_unstemmed |
Efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of Castetarbe on the Pau river |
title_sort |
efficiency of the recent upstream fish passage device installed at the hydroelectric power plant of castetarbe on the pau river |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.inrae.fr/hal-02580505 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
https://hal.inrae.fr/hal-02580505 irstea. 2001, pp.7 |
op_relation |
hal-02580505 https://hal.inrae.fr/hal-02580505 IRSTEA: PUB00010238 |
_version_ |
1766363562861658112 |