Contributions respectives des courants et de la houle dans la mobilité sédimentaire d'une plate-forme interne estuarienne. Exemple : le seuil interinsulaire, au large du pertuis d'Antioche, France. Respective contributions of currentsnext term and swell to the sediment mobility in an internal estuarine platform. Example of the inner shelf seaward of the ‘pertuis Charentais', France

Abstract : Respective contributions of currents and swell to the sediment mobility in an internal estuarine platform. Example of the inner shelf seaward of the ‘pertuis Charentais', France. This paper investigates the relative influence of waves, wind-induced current and tidal current on the sediment mobility of a macro-tidal environment belonging to the inner shelf seaward of the ‘pertuis Charentais' (France). This study, mainly based on three-week hydrodynamic in-situ measurements, shows that, for a water depth of 23 m, the swell (rather than wind waves) orbital velocity is large enough to initiate the motion of medium sands that are then transported by currents. Estimations show that medium sand of 0.2 mm is transported during 92% of the measurements, whereas coarse sand and gravel move sporadically, during storm, synchronously with spring tides. Further more, bedload fluxes appear strongly larger when waves are taken into account (370 times larger for 0.2-mm sands)
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https://hal-brgm.archives-ouvertes.fr/hal-00557290
Contributeur : Déborah Idier <>
Soumis le : mardi 18 janvier 2011 - 18:56:02
Dernière modification le : samedi 20 avril 2019 - 02:05:17

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Déborah Idier, Rodrigo Pedreros, Carlos Oliveros, Aldo Sottolichio, L. Choppin, et al.. Contributions respectives des courants et de la houle dans la mobilité sédimentaire d'une plate-forme interne estuarienne. Exemple : le seuil interinsulaire, au large du pertuis d'Antioche, France. Respective contributions of currentsnext term and swell to the sediment mobility in an internal estuarine platform. Example of the inner shelf seaward of the ‘pertuis Charentais', France. Comptes Rendus Géoscience, Elsevier Masson, 2006, 338 (10), pp.718-726. ⟨10.1016/j.crte.2006.05.004⟩. ⟨hal-00557290⟩

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