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Accueil > Équipes > Equipe MEIGE : Modélisation, Expériences et Instrumentation pour la Géophysique et l’Environnement > Domaines d’application > Littoral

Near bed dynamics of suspended sediment and fluid mud in the turbid macro-tidal Gironde estuary

The deposition of fluid mud layers on the bottom of channels and harbours and their evolution under natural conditions have been observed for years. Nevertheless, physical parameters controlling formation of fluid mud have been more often investigated under laboratory conditions or by numerical simulations. When used in a complementary way, recent acoustic and optic flow measuring technologies can provide the evolution of turbulence and suspended sediment concentration within the estuarine fluid mud layers. The objectives of this field study is to identify and characterise the leading physical processes governing near-bed sediment dynamics related to the formation and evolution of lutoclines in the macro-tidal Gironde estuary.

Sottolichio A., Hurther D., Laguionie P., Crave A. (2009) Near-bed dynamics of suspended sediment and fluid mud in the channel of a turbid macrotidal estuary. Proceedings of Intern. Conf. on nearshore and estuarine cohesive sediment transport processes (INTERCOH), Brazil

Sottolichio A., Hurther D., Bretel P., Gratiot N.(2007) Benthic processes in a highly turbid estuary through acoustic velocity measurements Proceedings of Intern. Conf. on nearshore and estuarine cohesive sediment transport processes (INTERCOH), Brest, France.

Gratiot N., Michallet H., Mory M. (2005) On the determination of settling flux of cohesive sediments in a turbulent fluid. J. Geophys. Res., 110, C06004.

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