Cartography of the evolution of the shoreline of Baguida-Agbodrafo (South-East Togo) from 1986 to 2017: contribution of the tool "Mobilitéde Trait de Côte (MobiTC)"

Abstract

Like the coasts of the world, the phenomenon of coastal erosion is manifested on the entire coast of Togo and has continued to be acute since the construction of the Autonomous Port of Lome in 1967. It is characterized by the destruction of socioeconomic goods (infrastructures, habitats and tourist sites). On the coasts of the Baguida and Agbodreafo cantons in particular, erosion threatens fishing activities, the beach economy, tourist sites and villages such as Gbodjomé, Gbétsogbé, Agbavi, DoèviKopé and Payimé. In order to contribute to sustainable coastal development choices in Baguida-Agbodrafo, this study aims to characterize the dynamics of the coastline by producing a map of coastal erosion at the local scale for better appreciation of the phenomenon of erosion. To do this, the geomatics approach consisted of extracting and compiling the various shoreline from the 1986, 2001, 2010, 2013, and 2017 Landsat images of the study area. The measurement of shoreline development in this area of the coastline was done through the MobiTC Software. The variations observed between 1986 and 2017 show an eroding coastline at an average rate of-2.92 m / year.