Flow design of guiding device for downstream fish migration
Abstract Downstream migrating smolt must be guided around hydropower plants to avoid fish mortality due to the turbines. In Piteå River, which is already regulated, open spillways serve this purpose but few fish find this route. Hence, action must be taken to enhance downstream fish migration. One w...
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crwiley:10.1002/rra.1250 2024-09-15T18:30:44+00:00 Flow design of guiding device for downstream fish migration Lundström, T. Staffan Hellström, J. Gunnar I. Lindmark, Elianne M. 2010 http://dx.doi.org/10.1002/rra.1250 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Frra.1250 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.1250 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor River Research and Applications volume 26, issue 2, page 166-182 ISSN 1535-1459 1535-1467 journal-article 2010 crwiley https://doi.org/10.1002/rra.1250 2024-07-09T04:13:51Z Abstract Downstream migrating smolt must be guided around hydropower plants to avoid fish mortality due to the turbines. In Piteå River, which is already regulated, open spillways serve this purpose but few fish find this route. Hence, action must be taken to enhance downstream fish migration. One way to attract the fish to the spillways is to direct the surface flow towards them by means of a guiding device. The hydrodynamic design of one such device is outlined using numerical calculations of the flow upstream the spillways and by the assumption that the fish moves near the surface of the water. A number of geometries are evaluated by starting from a straight impermeable barrier that extends 2 m down from the water surface and stretches over a part of the river. A major result is that it is possible to redirect the surface water towards the spillways at very low spilling rates which means high energy efficiency. Another finding was that the device should stretch over a large part of the river. For optimal functionality, the spilling should match the guiding device geometry. High spilling implies that the guiding has a low impact while for low spilling the geometry is crucial for successful downstream migration. Copyright © 2009 John Wiley & Sons, Ltd. Article in Journal/Newspaper Piteå Wiley Online Library River Research and Applications 26 2 166 182 |
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English |
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Abstract Downstream migrating smolt must be guided around hydropower plants to avoid fish mortality due to the turbines. In Piteå River, which is already regulated, open spillways serve this purpose but few fish find this route. Hence, action must be taken to enhance downstream fish migration. One way to attract the fish to the spillways is to direct the surface flow towards them by means of a guiding device. The hydrodynamic design of one such device is outlined using numerical calculations of the flow upstream the spillways and by the assumption that the fish moves near the surface of the water. A number of geometries are evaluated by starting from a straight impermeable barrier that extends 2 m down from the water surface and stretches over a part of the river. A major result is that it is possible to redirect the surface water towards the spillways at very low spilling rates which means high energy efficiency. Another finding was that the device should stretch over a large part of the river. For optimal functionality, the spilling should match the guiding device geometry. High spilling implies that the guiding has a low impact while for low spilling the geometry is crucial for successful downstream migration. Copyright © 2009 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Lundström, T. Staffan Hellström, J. Gunnar I. Lindmark, Elianne M. |
spellingShingle |
Lundström, T. Staffan Hellström, J. Gunnar I. Lindmark, Elianne M. Flow design of guiding device for downstream fish migration |
author_facet |
Lundström, T. Staffan Hellström, J. Gunnar I. Lindmark, Elianne M. |
author_sort |
Lundström, T. Staffan |
title |
Flow design of guiding device for downstream fish migration |
title_short |
Flow design of guiding device for downstream fish migration |
title_full |
Flow design of guiding device for downstream fish migration |
title_fullStr |
Flow design of guiding device for downstream fish migration |
title_full_unstemmed |
Flow design of guiding device for downstream fish migration |
title_sort |
flow design of guiding device for downstream fish migration |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1002/rra.1250 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Frra.1250 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.1250 |
genre |
Piteå |
genre_facet |
Piteå |
op_source |
River Research and Applications volume 26, issue 2, page 166-182 ISSN 1535-1459 1535-1467 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/rra.1250 |
container_title |
River Research and Applications |
container_volume |
26 |
container_issue |
2 |
container_start_page |
166 |
op_container_end_page |
182 |
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1810472256562790400 |