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A computer-generated image shows how the proposed construction of a guide wall downstream of The Dalles Dam would alter the water’s direction on the Columbia River. Researchers used a supercomputer at Pacific Northwest National Laboratory and a commercially available software to create a detailed 3-D computational fluid dynamic model to demonstrate how a guide wall could direct passing salmon away from shallow waters downstream of the dam, where predatory fish gather.

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Document Title: Proposed Guide Wall at The Dalles Dam
Category: Marine Science
Media Type: Graphics
Date of Image/Photo: July 17, 2009
Background: This graphic illustrates research highlighted in the technical paper "Modeling Juvenile Salmon Egress Conditions in The Dalles Dam Tailrace using Computational Fluid Dyamics," which is being presented July 29, 2009 at the Waterpower XVI conference in Spokane, Wash. The graphic is also being included in a press announcement about the presentation, which will be given by Marshall Richmond.
URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/DRAE-7_6NPP

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