Systems Analysis for Fisheries Protection and Mitigation at Corps of Engineers Columbia River Damsby Bolyvong Tanovan, US Army Corps of Engineers, Portland, OR, USA,
Douglas Arndt, US Army Corps of Engineers, Portland, OR, USA,
Stephen H. Smith, US Army Corps of Engineers, Portland, OR, USA,
Abstract: Pacific Northwest anadromous salmon and steelhead that migrate to and from the ocean are greatly affected by the numerous Columbia and Snake River dams they have to pass, first downstream as juveniles, then back upstream as adults years later. With the passage of the Pacific Northwest Electric Power Planning Act of 1980, with its mandate to ensure 'equitable treatment' for fish and wildlife resources with other project purposes, analytical capabilities for systematic simulation of anadromous smolt migration and survival have been developed based on a fish passage survival model (FISHPASS) and existing hydro-system simulation models. This modeling capability allows analysis of the impacts of proposed mitigation actions such as the Water Budget, fish screens, fish spill and fish transportation on juvenile fish survival through the entire Columbia River system. It also allows estimation of potential impacts to fisheries caused by changes in long-range hydro-system operations.
Subject Headings: Fish management | System analysis | Dams | Hydrologic models | Simulation models | Rivers and streams | Computer models | River systems | Electric power | Pacific Northwest | North America | United States
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