Managing Reservoir Storage for Fish Production

by Terry Waddle, (A.M.ASCE), US Fish and Wildl. Serv., Ft. Collins, United States,
Jeff Sandelin, US Fish and Wildl. Serv., Ft. Collins, United States,

Document Type: Proceeding Paper

Part of: Water Policy and Management: Solving the Problems


Salmon populations in numerous Pacific Coast rivers are in decline and are in danger of becoming threatened or endangered. A reservoir system simulation model was developed for the Trinity River, California that considers Central Valley Project exports from the Trinity Basin and instream flows for fishery maintenance. A fish population model that tracks Chinook salmon in the Trinity River (California) from eggs to the presmolt stage has been developed by the U.S. Fish and Wildlife Service. The numbers of salmon produced by managed flow regimes for that river can be estimated using that model. Alternative reservoir management strategies to provide instream flows are evaluated using these two models. Use of the combined models allows trade-offs between water use for the fishery and for traditional project purposes to be evaluated.

Subject Headings: Hydrologic models | Reservoirs | Water storage | Fish management | Flow simulation | Instream flow | River flow | Water resources | California | United States

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