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Coastline Mobility of Goree Island (Senegal), from 1942 to 2011

This current study aims to quantify Goree island littoral evolution from 1942 to 2011 in the context of sea level rise. Digital Shoreline Analysis System (DSAS), in ArcGIS software was used to extract shoreline positions based on satellites and aerials photography (1942, 1966 and 2011) and estimate historic rate of change. Rates of change statistics were calculated using End Point Rate (EPR) and Net Shoreline Movement (NMS). In this study, EPR was calculated by dividing NMS by elapsed time between earliest and latest measurements for each transect. Results obtained show that shoreline between 1942 and 1966 retreated (-4m) at an average rate of -0.16m /year, compared an average of -0.06m / year between 1966 and 2011. This dynamic can be interpreted as result of project to preserve and restore Goree island (1979-1981). Slave house, mosque of island, Mariama BA School, and historical museum are the most sector affected by erosion. Analysis of results showed that causes are more natural than anthropic. These results provide coastal erosion specialists with valuable information for warning, prevention and adaptation measures against natural disasters such as flooding.

Auteur(s) : Bakhoum P. W, Ndour A., Niang I., Sambou B, Traore V. B., Diaw A. T., Sambou H., Ndiaye M. L.
Pages : 1-9
Année de publication : 2017
Revue : Marine Science
N° de volume : 7 (1)
Type : Article
Mise en ligne par : NDOUR Abdoulaye