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Studies to establish biological design criteria for fish passage facilities : separation by size of juvenile salmonids using a high-velocity flume at Ice Harbor Dam in 2004
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2005
[PDF-7.47 MB]
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Description:During 2004, a study design was implemented to test separator performance when numbers offish or rates of fish passage more closely represent the actual conditions encountered atjuvenile collection facilities during periods of peak passage. To accomplish this, juvenile salmon were collected from gatewells at Lower Granite Dam, transported to Ice Harbor Dam, and held overnight prior to testing. After holding, test fish were released through a 20.3-cm diameter hose directly into the 91-cm diameter pipe exiting the juvenile bypass channel. Passage through the pipe to the test separator (a distance of approximately 250 m) took just under 1 min. Results from this study indicated that juvenile salmonid separation efficiency of over 80% could be achieved with no delay in passage when nearly 2,000 smolts/min passed through the separator.
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Rights Information:CC0 Public Domain
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Compliance:Library
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