Sediment Modeling of Dam Removal Alternatives, Elwha River, Washingtonby Bruce A. Stoker, Ebasco Environmental, Bellevue, United States,
David T. Williams, Ebasco Environmental, Bellevue, United States,
Abstract: The new version of the U.S. Army Corps of Engineers (ACOE) 1-Dimensional sediment transport model, HEC-6 'Scour and Deposition in Rivers and Reservoirs', was used to evaluate the sediment transport characteristics of the Elwha River, Washington with dam retention and dam removal scenarios. This required evaluation of existing channel conditions, inflowing sediment loads, calibration to historic sedimentation in the reservoirs, estimation of past hydrology, and determination of reservoir trap efficiencies.
Subject Headings: Sediment | Dams | Hydrologic models | Hydraulic models | Rivers and streams | Sediment transport | Reservoirs | Transportation engineering | Washington | North America | United States
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