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Computation of Morphological Change in a Channel Bend With Non-Uniform Curvature Using the 2D Shallow Water Equations

Author(s): Seonmin Lee, Chaewoong Ban, Sung-Uk Choi

Linked Author(s): Sung-Uk Choi

Keywords: Curved channel, non-uniform curvature, shallow water equations, Exner�s equation, inertia adaptation

Abstract: This study presents a 2D numerical model for predicting the flow and morphological change in a curved channel. For the flow, the shallow water equations are solved by the finite volume method. Engelund-Hansen's formula is used to account for the total sediment load. To update the bed elevation changed by sediment transport, Exner's equation is solved. Since the conventional 2D models predict the morphological change poorly when applied to a curved channel with a low sinuosity, a method to slow down the inertia adaptation is proposed. Flow and morphological change are simulated for curved channels with non-constant curvatures, and results are discussed


Year: 2017

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