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Studies to establish biological design criteria for wet separators, 1996
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1998
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[PDF-13.33 MB]
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Description:Separation of juvenile salmonid species is important for the effective management of the Columbia and Snake River Systems and the fish transportation program. Thus, separation of smolts by size has been incorporated into all the new juvenile fish bypass systems at hydroelectric dams on the Columbia and Snake Rivers. However, results using wet-separator designs currently available have been less than adequate for separating smolts into large (s 180 mm) and small (<180 mm) size classes. In addition to poor separation, there is evidence that smolts hold in separator units, resulting in increased stress and migration timing delays. In 1996, the National Marine Fisheries Service and the U. S. Army Corps of Engineers initiated a project to provide biological design criteria to aid in the development of an improved wet separator planned for installation at the new Lower Granite Dam Fish Passage Facility. This study evaluated a new approach to separation, in addition to evaluating methods for improving the traditional wet-separator concept to reduce holding times and stress in fish during the separation process.
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Rights Information:CC0 Public Domain
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