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Two-Dimensional Modeling of River Dynamics for the Expansion of Clover Island, Kennewick, Washington

by Thomas S. Wang, (M.ASCE),
David P. Simpson, (M.ASCE),
Raymond Walton, (M.ASCE),



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

The Port of Kennewick, Washington, is proposing to redevelop Clover Island as a waterfront village concept. The island is located in the Columbia River between McNary and Priest Rapids dams, which control river flows and stages in this section of the river. The FastTABS modeling system was applied to assist in the design of shoreline modifications and to predict the effects of the modifications on flow velocities. A comprehensive bathymetric survey, for a channel length of approximately 2.4 kilometers, provided such detailed data that the construction of a finite-element grid was accomplished in a matter of hours. The circulation model, RMA-2, was calibrated to currents measured during a moderately low river flow, and then used to evaluate and compare existing and proposed conditions for a variety of flows. Preliminary results showed that the proposed development could be sited in a way that the main channel velocities will increase only slightly.

Subject Headings: Two-dimensional models | River flow | Islands | Streamflow | Flow measurement | Shoreline protection | Rivers and streams | Washington | United States

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