OBSERVATIONS AND NUMERICAL MODEL RESULTS OF MORPHODYNAMIC FEEDBACK OWING TO WAVE-CURRENT INTERACTION - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

OBSERVATIONS AND NUMERICAL MODEL RESULTS OF MORPHODYNAMIC FEEDBACK OWING TO WAVE-CURRENT INTERACTION

J Hopkins
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  • PersonId : 1059955
M A de Schipper
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  • PersonId : 1059956
M Wengrove
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  • PersonId : 1059957
F de Wit
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  • PersonId : 1059958

Résumé

Predicting the evolution of mound formations in the nearshore, both natural (e.g. bars) and man-made (e.g. nourishments) requires an understanding of mixed wave-current flow on sediment transport. MODEX (Morphological Diffusivity EXperiment) used a wave-current-sediment flume to observe in detail the evolution of a sand mound in shallow water. Imposed flow included waves-alone, currents-alone, and combined wave-currents. MODEX observations show the impact of currents on waves around the mound and the feedback with morphology. Here, a wave-resolving model SWASH is used to simulate flow patterns around the mound as it diffuses, showing the impact of wave-current interaction on mound evolution. Further, simulations initialized with a diffused mound show the feedback between 3D bed deformation and wave-current flow structures. The results provide a framework for understanding and implementing intra-wave sediment transport in wave-resolving models. Extensions of the results to field conditions with mixed wave-current energy will be explored.

Domaines

Océanographie
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Dates et versions

hal-02394984 , version 1 (11-12-2019)

Identifiants

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J Hopkins, M A de Schipper, M Wengrove, F de Wit, B. Castelle. OBSERVATIONS AND NUMERICAL MODEL RESULTS OF MORPHODYNAMIC FEEDBACK OWING TO WAVE-CURRENT INTERACTION. Coastal Sediments'19, May 2019, Tampa, United States. ⟨10.1142/9789811204487_0049⟩. ⟨hal-02394984⟩

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