3D hydrodynamic modelling of a microtidal barred beach (Sète, NW Mediterranean Sea) during storm conditions

Heloise Michaud (1) , Nicolas Robin (2) , C. Estounel (3) , Patrick Marsaleix (3) , Yann Leredde (1) , R. Certain (4) , Frederic Bouchette (1)

1 Géosciences Montpellier - Risques
2 UPVD - Université de Perpignan Via Domitia
3 LAERO - Laboratoire d'aérologie
4 CEFREM - Centre de formation et de recherche en environnement marin

The field campaign on the Sète coast deployed during the winter 2009 was used to understand the hydrodynamics on a double barred beach in the surf zone during storm periods. The large set of measurements collected at several position and depth were also useful to improve the 3D circulation model Symphonie that takes into account the atmospherics and wave forcings. Once implemented on the beach and supplemented with some additional parameterizations concerning the roller effects and the bottom friction, the model was tuned and validated in the surf zone. The role of the different processes was then analysed. Thus, the roller and the bottom friction are of primary importance in the dynamics of the circulation. Thanks to its 3D nature and once associated with a sediment transport model and a morphodynamic model, Symphonie will offer a good representation of the sediment transport.

Mots clés: hydrodynamic; waves; current; 3d model; measurements

Domaines: Océan, Atmosphère

Heloise Michaud, Nicolas Robin, C. Estounel, Patrick Marsaleix, Yann Leredde, et al.. 3D hydrodynamic modelling of a microtidal barred beach (Sète, NW Mediterranean Sea) during storm conditions. Coastal Dynamics 2013 7th international conference of Coastal Dynamics, Jun 2013, Arcachon, France. pp.1183-1194. ⟨hal-00855035⟩