EVALUATION OF FLOOD VOLUMES BY SATELLITE IMAGE PROCESSING INTO THREE-DIMENSIONAL CHARACTERISTICS: APPLICATION TO LAKE CHAD

Lake Chad's challenges are so important that its draining requires thoughtfulness for its long-term refloating. Possessing two major tributaries that are the Logone and Chari, a track would be to value the waters that spread at their surroundings creating flood plains, this following the meeting of obstacles in their bed. With this in mind, it seems necessary to control the volumes of these waters and justify from this result the need to use them. Satellite images display content rich in information that is very relevant in a hydrological study context; their exploitation may prove to be an effective tool. It is with that perspective that we have proposed a method for estimating water volumes by transforming a satellite image by a method known as interferometric into a usable digital model known under the acronym DEM (Digital elevation model). Then by performing operations for treating depressions and flat areas, generating flow directions and the water flow accumulation network and subsequently determining volumes on specific sections of the Lake Chad tributaries showing wastage by using the DEM.