Columbia River Hybrid Modeling System

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Abstract
A hybrid modeling method for predicting waterway sedimentation was developed and applied to the Columbia River estuary. The method uses physical hydraulic models, two dimensional (2‐D) numerical models, and analytical techniques in an integrated solution scheme. The hybrid modeling system used to study the Columbia consisted of a large physical model of the estuary, RMA‐2V, a depth‐integrated numerical model for sediment transport, and a collection of analytical methods. By using each method to address those phenomena that it is best able to describe, an improved modeling technique is created.

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