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Genre/Form: | Thèses et écrits académiques |
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Material Type: | Document, Thesis/dissertation, Internet resource |
Document Type: | Internet Resource, Computer File |
All Authors / Contributors: |
Arthur Robinet; Bruno Castelle; Déborah Idier; Philippe Bonneton; Stéphane Abadie, speÌcialiste en GeÌnie Civil).; Eric Barthélémy, physicien hydraulicien).; Xavier Bertin; Christophe Cassou; Gonéri Le Cozannet; Vincent Marieu; Université de Bordeaux (2014-....).; École doctorale Sciences et Environnements (Pessac, Gironde).; Environnements et Paléoenvironnements Océaniques (Talence).; France. Bureau de recherches géologiques et minières |
OCLC Number: | 1029875151 |
Notes: | Titre provenant de l'écran-titre. |
Description: | 1 online resource |
Responsibility: | Arthur Robinet ; sous la direction de Bruno Castelle et de Déborah Idier. |
Abstract:
Wave-dominated sandy coasts are highly dynamic and populated systems increasingly threatened by erosion hazard. Understanding and predicting shoreline change is critical to inform and guide stakeholders. However, there is currently no numerical model able to reproduce and predict shoreline evolution over the full range of temporal scales and coastal geometries owing to numerical and physical limitations. This thesis focuses on the development of new reduced-complexity models to simulate shoreline change along wave-dominated sandy coasts on the timescales from hours to decades with low computation time. First, a statistical shoreline change model based on the seasonal occurrences of some oceanic basin weather regimes is developed. This model allows simulating shoreline variability at the seasonal and interannual scales, without resorting to wave data or sediment transport modeling. Second, a new so-called LX-Shore numerical wave-driven shoreline change model is developed, which takes the best from some existing models and includes additional numerical and physical developments. LX-Shore couples the primary longshore and cross-shore processes and includes the feedback of shoreline and bathymetric evolution on the wave field using a spectral wave model. LX-Shore successfully simulates the dynamics of coastal embayments or the formation of subsequent nonlinear evolution of complex shoreline features such as flying sandspits. It is anticipated that LX-Shore will provide new and quantitative insight into the respective contributions of the processes controlling shoreline change on real coasts for a wide range of wave climates and geological settings.
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