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Modeling of wave induced embankment erosion and recession
Proceedings of the 2023 Mississippi Water Resources Conference
Year: 2023 Authors: Ozeren Y., Rossell W., Wren D.
Irrigation reservoir embankments are subjected to rapid erosion and retreat due to wind-generated waves. Accurate prediction of embankment recession rate is necessary to correctly assess the level of impairment and identify protection strategies. In this study, two different models were used to predict the embankment recession rates for soil embankments subjected to waves: XBeach, an open-source coastal modeling software developed by Deltares, and the USDA-ARS Bank-Stability and Toe-Erosion model (BSTEM). A one-dimensional numerical wave tank was created using the XBeach and simulations were carried out in order to understand the mechanisms involved during the recession of earthen embankments and provide accurate prediction methods. The simulation results were compared with the laboratory experiments in a wave tank at the USDA-ARS National Sedimentation Laboratory. BSTEM simulations were carried out at both laboratory and field scales. The results showed that the XBeach model reasonably predicted the embankment recession, except during the initial formation of the beach slope. A comparison of these simulations will be presented.