Sediment transport modeling
• During CEMRACS'11, dedicated to Multi Scale Coupling of Complex Models, I participated in the project MOHYSE (hydro-sedimentary modeling) where we focus on the modeling of sediment transport :
where Q=Hu is the water discharged and H is the water height.
We mainly focus on the bed load transport. We first propose a coupled numerical scheme for the classical Saint Venant - Exner model. It is based on a relaxation approach and it works with all sediment flux function. We exhibit that this coupled approach is more stable than the splitting approach that is mostly used in industrial softwares. Then we derive an original three layers model in order to overcome the difficulties that are encountered when using the classical Exner approach and we write a related relaxation model.
