This project (SHOM-IRD 20CP05) supports the PhD study of Simon Treillou. It is part of a program aiming at improving the real-time knowledge of the marine environment, more particularly the coastal dynamics through numerical hydro-sedimentary modeling. The computational code CROCO has recently been enriched with a non-hydrostatic solver allowing it to explicitly solve waves and their energy transfer to the three-dimensional coastal circulation. This tool is a major asset, with few equivalents, which should allow solving coastal circulation on realistic beach configurations with a small number of unknown parameters. It will also help to calibrate classical engineering tools, simpler and more dependent on these parameters. The impact of non-hydrostatic 3D dynamics on the littoral circulation and associated transports is currently unknown while the classical 2D horizontal models have been struggling to describe the observations for decades now. This study will therefore shed new light on the functioning of hydro-sedimentary systems.
Marchesiello P., J. Chauchat, H. Shafiei, R. Almar, R. Benshila, F. Dumas, L. Debreu, 2022: 3D wave-resolving simulation of sandbar migration. Ocean Modelling, 180, 102127.
Marchesiello P., F. Auclair, L. Debreu, J.C. McWilliams, R. Almar, R. Benshila, F. Dumas, 2021: Tridimensional nonhydrostatic transient rip currents in a wave-resolving model. Ocean Modelling, 163, 101816.