Abstract
Coastal accretion as a result of erosion of farmed watersheds: example of the Galion Bay. The progradation of the shores of the Galion Bay (Martinique) has been measured based on diachronic mapping analysis. The sedimentary volume which accumulates along the coast and in the bay (under the water surface) is unknown. Erodibility has been surveyed on a square meter scale and extrapolated to the watersheds. The results show that most sediments originate from the farmed surfaces, they are then entrained by the runoff and the Galion river and deposited along the coast, where the bathymetry and currentology of the bay facilitate sediment retention. The harmful effects of anthropogenic influence in the area are discussed. © 2000 Ifremer / CNRS / IRD / Éditions scientifiques et médicales Elsevier SAS Martinique / soil erodibility / accretion of the coastline / coast / environment
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