This paper aims at constructing relational maps by using GIS technology and lab analyses of selected samples of sand of the valley's basin in order to evaluate the degradation by depending on biological criteria to monitor the soil condition as well as monitoring the changes that occur on soil and vegetation and the spatial distribution of the soil. The soil was characterized by low salinity, medium and moderate light base and low value of organic materials. Its mixture was characterized by moderate and medium coarseness. The morphological analysis also showed the great variability in the area of the secondary valley's basins, which led to a variation in their water yield. It also had the advantage of not completing the geomorphological cycle because the basins are still in the youth stage and that the erosion process surpassed the deposition process.