American Society of Civil Engineers

Morphodynamic Modeling of Nearshore Crescentic Bar Dissymmetry on an Open Coast: Aquitanian Coast, France

by Bruno Castelle, (UMR EPOC 5805, Universite Bordeaux I, Avenue des Facultes, 33405 Talence Cedex, France E-mail:, Philippe Bonneton, (UMR EPOC 5805 E-mail:, Remi Butel, (UMR EPOC 5805 E-mail:, and Helene Dupuis, (UMR EPOC 5805 E-mail:
Section: Rythmic Features, pp. 1-11, (doi:

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Document type: Conference Proceeding Paper
Part of: Coastal Dynamics 2005: State of the Practice
Abstract: Nearshore crescentic bars are observed all year long along the French Aquitanian Coast. Their shape can vary from a typical crescentic shape to a strongly dissymmetric shape, and their dynamic is still poorly understood. Nonlinear nearshore model and field survey are used to investigate Aquitanian Coast crescentic bar formation development and particularly their dissymmetric behaviour. Results show that circulation eddies are a key component of nearshore crescentic bar morphodynamic and that long periods of oblique swell can result in a dissymmetric crescent shape. This study leads to a conceptual model which is in agreement with field observations.

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