The use of altimetric data (Altus) in the characterization of hydrodynamic climates controlling hydrosedimentary processes of intertidal mudflat: the Vilaine estuary case (Brittany, France)

Evelyne Goubert (1) , Emmanuel Frenod (2) , Pierre Peeters (3) , Pauline Thuillier , Hans Jacob Vested , Nathalie Bernard (4)

1 GMGL
2 UBS Vannes - Université de Bretagne Sud - Vannes
3 Early Stage Development
4 LERMA - Laboratoire d'Etudes et de Recherche sur le Monde Anglophone

Since the construction of the Arzal dam between 1965 and 1970, the Vilaine estuary is characterized by a strong silting up. Hydrodynamic climates could be identified as responsible for erosion or deposition at different spatio-temporal scales from bathymetrical, hydrological and altimetric (NKE-Altus) data. Each thickness of eroded or deposited sediment could be associated to a typical hydrodynamic climate. Furthermore, it was possible to show the effect of a ridge-runnel bedforms or a smooth surface on the dynamic of the intertidal mudflat.

Mots clés: Intertidal mudflat; Hydrodynamics; Ridge-runnel bedforms (cross shore)

Domaines: Géomorphologie

Evelyne Goubert, Emmanuel Frenod, Pierre Peeters, Pauline Thuillier, Hans Jacob Vested, et al.. The use of altimetric data (Altus) in the characterization of hydrodynamic climates controlling hydrosedimentary processes of intertidal mudflat: the Vilaine estuary case (Brittany, France). Revue Paralia, 2010, 3, pp.6 - 17. ⟨10.5150/revue-paralia.2010.006⟩. ⟨hal-02378948⟩