On the predictive skill of morphodynamic models for onshore sandbar migration |
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| Authors: | Viyaktha Hithaishi Hewageegana Alberto Canestrelli |
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| Institution: | Department of Civil and Coastal Engineering, University of Florida, Gainesville, FL, USA |
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| Abstract: | A simplified process-based approach for evaluating onshore sandbar migration is presented in this study. This approach takes wave-averaged parameters as input and computes sediment transport processes using a reconstructed intra-wave orbital velocity signal. The proposed method guarantees good predictive skills for multiple onshore sandbar migration cases without an ad hoc calibration for each scenario. The study differs from previous onshore sandbar migration models, where calibration and testing are performed on just one or few events, and model assessment for uncalibrated realizations is rarely carried out. The present version of the model only addresses onshore sandbar migrations. For the onshore migration cases analyzed, the model has better predictive skills than state-of-the-art morphodynamic models (XBeach and Unibest-TC). |
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| Keywords: | onshore sandbar migration sediment transport velocity signal reconstruction wave asymmetry wave skewness |
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