The knowledge of future long-term sandy shoreline evolution is necessary for sustainable coastline management. However, the impact of sediment transport due to headland sand bypassing is not yet well addressed in shoreline models. This work aims at implementing a parametric expression for sand bypassing in the reduced complexity shoreline model LX-Shore. The parametrization of the wave-forced sediment bypassing around an isolated headland developed by McCarroll et al. (2021) is implemented. Considering an idealized configuration of a 300-m long, initially straight, sandy coast with a rectangular headland, results show that headland sand bypassing has a substantial impact on the downdrift (updrift) erosion (accretion) pattern and magnitude. Our simulations imply that taking into account bypass transport in long-term shoreline models such as LX-Shore could provide new insights into coastal embayment changes.< Réduire

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https://oskar-bordeaux.fr/handle/20.500.12278/187976

DOI

http://dx.doi.org/10.1142/9789811275135_0126

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Comprendre et prévoir l'évolution contemporaine du traite de côte dans un contexte de changement climatique par assimilation de données satellite dans les modèles hybrides - ANR-21-CE01-0015

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EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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ON THE IMPACT OF HEADLAND BYPASSING ON SHORELINE CHANGE IN A ONE-LINE MODEL

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