An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines
Louver deflectors for guiding Atlantic salmon (Salmo salar) away from destructive power turbines were installed in a canal leading to the powerhouse at East River, Sheet Harbour, Nova Scotia, in 1966. Guiding efficiency studies, using hatchery-reared smolts, showed that a minimum approach:bypass vel...
Published in: | Journal of the Fisheries Research Board of Canada |
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Canadian Science Publishing
1972
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Online Access: | http://dx.doi.org/10.1139/f72-217 http://www.nrcresearchpress.com/doi/pdf/10.1139/f72-217 |
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crcansciencepubl:10.1139/f72-217 2024-09-15T17:56:07+00:00 An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines Ducharme, L. J. A. 1972 http://dx.doi.org/10.1139/f72-217 http://www.nrcresearchpress.com/doi/pdf/10.1139/f72-217 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 29, issue 10, page 1397-1404 ISSN 0015-296X journal-article 1972 crcansciencepubl https://doi.org/10.1139/f72-217 2024-07-11T04:12:01Z Louver deflectors for guiding Atlantic salmon (Salmo salar) away from destructive power turbines were installed in a canal leading to the powerhouse at East River, Sheet Harbour, Nova Scotia, in 1966. Guiding efficiency studies, using hatchery-reared smolts, showed that a minimum approach:bypass velocity ratio of 1.0:1.5 was a prerequisite to high guiding efficiency. From 1967 to 1971, average guiding efficiency was increased from 57% to 80% through modifications which increased velocity and reduced flow turbulence in the bypass. A significant correlation existed between approach velocity and guiding efficiency within the range tested after bypass hydraulics had been modified. Tests conducted with varying louver bar spacing ranging from 5.1 to 30.5 cm (2–12 inches) showed that the wider spacings did not impair guiding efficiency.Vertical distribution of smolt migrants in the power canal indicated that over 80% of the fish remained above depth 1.3 m. This was borne out by the fact that the bypass was effective when operating to a depth of only 0.91 m. An appraisal of the practicality of the louver guiding system is presented. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Journal of the Fisheries Research Board of Canada 29 10 1397 1404 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Louver deflectors for guiding Atlantic salmon (Salmo salar) away from destructive power turbines were installed in a canal leading to the powerhouse at East River, Sheet Harbour, Nova Scotia, in 1966. Guiding efficiency studies, using hatchery-reared smolts, showed that a minimum approach:bypass velocity ratio of 1.0:1.5 was a prerequisite to high guiding efficiency. From 1967 to 1971, average guiding efficiency was increased from 57% to 80% through modifications which increased velocity and reduced flow turbulence in the bypass. A significant correlation existed between approach velocity and guiding efficiency within the range tested after bypass hydraulics had been modified. Tests conducted with varying louver bar spacing ranging from 5.1 to 30.5 cm (2–12 inches) showed that the wider spacings did not impair guiding efficiency.Vertical distribution of smolt migrants in the power canal indicated that over 80% of the fish remained above depth 1.3 m. This was borne out by the fact that the bypass was effective when operating to a depth of only 0.91 m. An appraisal of the practicality of the louver guiding system is presented. |
format |
Article in Journal/Newspaper |
author |
Ducharme, L. J. A. |
spellingShingle |
Ducharme, L. J. A. An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines |
author_facet |
Ducharme, L. J. A. |
author_sort |
Ducharme, L. J. A. |
title |
An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines |
title_short |
An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines |
title_full |
An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines |
title_fullStr |
An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines |
title_full_unstemmed |
An Application of Louver Deflectors for Guiding Atlantic Salmon ( Salmo salar) Smolts From Power Turbines |
title_sort |
application of louver deflectors for guiding atlantic salmon ( salmo salar) smolts from power turbines |
publisher |
Canadian Science Publishing |
publishDate |
1972 |
url |
http://dx.doi.org/10.1139/f72-217 http://www.nrcresearchpress.com/doi/pdf/10.1139/f72-217 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of the Fisheries Research Board of Canada volume 29, issue 10, page 1397-1404 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f72-217 |
container_title |
Journal of the Fisheries Research Board of Canada |
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29 |
container_issue |
10 |
container_start_page |
1397 |
op_container_end_page |
1404 |
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1810432328576532480 |