Appréciation des risques d’érosion hydrique dans le bassin versant dans la région d’El bayadh (cas d’oued Deffa ) par la télédétection

Abstract

In this work we’re trying to study the degradation of soil using remote sensing and deographical information systems (GIS) to map areas at risk of erosion in a semi-arid region (in the case of the watershed of oued Deffa ,wilaya of El Bayadh). And produce a map of erosion that can be used as a document of reference for decision support. The methodology is to integrate into a geographic information system factors controlling erosion the erobility of the rains ,and the slope method BONFILS derived erosion risk map shows three areas of vulnerability to erosion by water.