Dunes morphodynamics superimposed on sand banks in a shallow macro-tidal environment: the example of the Haut Fond de Ouessant
| Type | Proceedings paper | ||||||||
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| Date | 2023-04 | ||||||||
| Language | English | ||||||||
| Other localization | https://marid7.sciencesconf.org/data/pages/proceedings.pdf | ||||||||
| Author(s) | Daguinos Paul1, Le Dantec Nicolas1, Le Roy Pascal1, Menier David2, Jouet Gwenael3, Ehrhold Axel 3, Franzetti Marcaurelio1, Trotot Alexandre1 |
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| Affiliation(s) | 1 : UMR 6538 GEO-OCEAN, UBO, UBS, CNRS, Ifremer, 29280 Plouzane, France 2 : UMR 6538 GEO-OCEAN, UBO, UBS, CNRS, Ifremer, 56017 Vannes, France 3 : UMR 6538 GEO-OCEAN, UBO, UBS, CNRS, Ifremer, 29280 Plouzane, France |
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| Meeting | MARID VII - Marine and River Dune Dynamics. 1-3 April 2023, Rennes, France | ||||||||
| Source | Valance, A., Garlan, T., Crave A., and Gangloff, A. (Eds), 2023. MARID VII. Seventh International Conference on Marine and River Dune Dynamics. Rennes, France, 3-5 April 2023. University of Rennes 1 and Shom. pp.63-67 | ||||||||
| Note | https://marid7.sciencesconf.org/ | ||||||||
| Abstract | This study investigates the morphological parameters and migration rates of dune systems associated with a set of banner banks located at intermediate depths (50 m to 120 m) in the context of a highly dispersive shelf, offshore Brittany (Western France). The work mainly focuses on the Haut Fond d’Ouessant bank. New geophysical data (bathymetry, seismic, reflectivity) from Speedunes (2015) and Bankable (2019) cruises are analysed. We examine how the large range in basal surface depth over which the bank lies affect the dune morphodynamics. We also characterize sediment fluxes between these sediment structures, toward an overview map of sediment pathways across the Iroise shelf, in relation with the straits and the irregular shelf bottom |
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