Shoreline change on a tropical island beach, Seven Mile Beach, Grand Cayman: The influence of beachrock and shore protection structures
نویسندگان
چکیده
Contemporary and near-future shoreline change is widely regarded as an issue on small tropical islands. While it anticipated that sea-level rise will precipitate recession islands, studies to date record both accretion at historical timescales. This study of Seven Mile Beach, Grand Cayman presents a case in which the local geomorphic setting shown be important influence behaviour. Consistent with its leeside setting, historic analysis (1958–2019) reveals erosion margins central part headland-embayment beach where no beachrock present. The comprises five discrete, but interlinked subcells delineated by low headlands exposed beachrock. These have emerged through post-1971 once become loci persistent erosion, suggesting positive feedback between waves. A Category 5 Hurricane generated waves directly opposed long-term modes throughout beach, patterns were temporarily reversed, however, pattern was restored within 2 years. contemporary cell development suggest reduction sediment supply leading cannibalization relict beachridges embayment emergence formerly buried effects coastal structures abatement measures assessed recommendations for management, including setback lines are presented.
منابع مشابه
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ژورنال
عنوان ژورنال: Marine Geology
سال: 2023
ISSN: ['1872-6151', '0025-3227']
DOI: https://doi.org/10.1016/j.margeo.2023.107006