Numerical Approaches for the Evaluation of Sediment Transport Mechanisms on a Shallow Sloping Sea Bottom - Archive ouverte HAL
Communication Dans Un Congrès Année : 2019

Numerical Approaches for the Evaluation of Sediment Transport Mechanisms on a Shallow Sloping Sea Bottom

Résumé

The seabed evolution due to wave-current interaction is examined in the case of a gently sloping bottom in a shallow water coastal area. In this study, an attempt has been made to estimate bed level changes over a time period of 96 hours, under accretive and erosive wave sequences. A numerical model based on the non-linear shallow water equations (NSWE) is utilized in order to simulate the wave propagation and hydrodynamic conditions. Two different approaches are used for the detailed investigation of sediment transport and seabed-fluid interactions. It is shown that the numerical approximation performs reasonably well, as the erosive sequence is characterized by an offshore sediment movement while the sandbar is driven shoreward under accretive wave conditions. The simulation is carried out on a variable coastal bathymetry corresponding to the wave basin experiments of Michallet et al. (2013) at LHF facility (Grenoble INP, France). The obtained results are qualitatively compared with laboratory observations.
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Dates et versions

hal-02568522 , version 1 (09-05-2020)

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  • HAL Id : hal-02568522 , version 1

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Vasileios Afentoulis, Andreas Papadimitriou, Vasiliki K. Tsoukala, Michel Benoit. Numerical Approaches for the Evaluation of Sediment Transport Mechanisms on a Shallow Sloping Sea Bottom. First International Scientific Conference on Design and Management of Harbor, Coastal and Offshore Works, May 2019, Athens, Greece. ⟨hal-02568522⟩
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