D'ANNA, Maurizio; IDIER, Déborah; CASTELLE, Bruno; VITOUSEK, Sean; LE COZANNET, Goneri

doi:10.3390/jmse9090974

Environnements et Paléoenvironnements OCéaniques [EPOC]
Bureau de Recherches Géologiques et Minières [BRGM]

IDIER, Déborah
Bureau de Recherches Géologiques et Minières [BRGM]

CASTELLE, Bruno

Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Journal of Marine Science and Engineering. 2021, vol. 9, n° 9, p. 974

Résumé en anglais

Long-term (>decades) coastal recession due to sea-level rise (SLR) has been estimated using the Bruun Rule for nearly six decades. Equilibrium-based shoreline models have been shown to skillfully predict short-term wave-driven shoreline change on time scales of hours to decades. Both the Bruun Rule and equilibrium shoreline models rely on the equilibrium beach theory, which states that the beach profile shape equilibrates with its local wave and sea-level conditions. Integrating these two models into a unified framework can improve our understanding and predictive skill of future shoreline behavior. However, given that both models account for wave action, but over different time scales, a critical re-examination of the SLR-driven recession process is needed. We present a novel physical interpretation of the beach response to sea-level rise, identifying two main contributing processes: passive flooding and increased wave-driven erosion efficiency. Using this new concept, we analyze the integration of SLR-driven recession into equilibrium shoreline models and, with an idealized test case, show that the physical mechanisms underpinning the Bruun Rule are explicitly described within our integrated model. Finally, we discuss the possible advantages of integrating SLR-driven recession models within equilibrium-based models with dynamic feedbacks and the broader implications for coupling with hybrid shoreline models< Réduire

Mots clés en anglais

Bruun Rule

equilibrium shoreline models

passive flooding

wave energy efficiency

Sea-Level Rise

URI

https://oskar-bordeaux.fr/handle/20.500.12278/188659

DOI

http://dx.doi.org/10.3390/jmse9090974

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Reinterpreting the Bruun Rule in the Context of Equilibrium Shoreline Models

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Résumé en anglais

Mots clés en anglais

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