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Using a Numerical Model to Evaluate Striped Bass Management Scenarios in the Sacremento-San Joaquin Delta, California

by Henry F. N. Wong, U.S.B.R., Sacramento, United States,
James F. Arthur, U.S.B.R., Sacramento, United States,
Melvin D. Ball, U.S.B.R., Sacramento, United States,
Lloyd J. Hess, U.S.B.R., Sacramento, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Since the mid-1970's, the striped bass, Morone saxatilus, population in the Sacramento-San Joaquin Delta, California has been declining. The primary suspected cause of the decline is associated with water diversions from the Delta by the Federal Central Valley Project (CVP) and California State Water Project (SWP) operations. Present CVP and SWP operations are suspected of diverting striped bass eggs and larvae and preventing their proper transport through the Delta. A numerical hydrodynamic and salt transport model is used to evaluate possible changes in CVP and SWP operations and structural modifications in the Delta to enhance proper bass larval transport and reduce their diversions. This report presents results of a modeling study to evaluate several possible management scenarios. Results of model simulations indicate that variations in operations and/or structural changes could be used to enhance bass larval transport. One potential management operation is presented.

Subject Headings: Numerical models | Salt water intrusion | Mathematical models | Hydrologic models | Hydrodynamics | Water resources | Water management | California | United States

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