QUANTIFICATION OF LONGSHORE TRANSPORT IN THE SURF ZONE ON MACROTIDAL BEACHES

Franck Levoy, Olivier Monfort, Helene Rousset, Claude Larsonneur

Abstract


Many in situ measurements of hydrodynamic parameters and sediment transport in the surf zone have been carried out on the beaches of the western coast of Normandy. The vertical and cross-shore distributions of the sediment transport induced by breaking waves have been identified in a set of various hydrodynamic conditions. Several longshore sediment transport formulas have been devised. The comparison between measured and computed transport rates enables choice of the best formulation according to the hydrodynamic context. This formulation emphasizes the indirect effect of tidal fluctuations on the wave characteristics and the sediment transport processe.

Keywords


macrotidal beach; longshore transport; surf zone; sediment transport

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