EJSSEurasian Journal of Soil ScienceEurasian J Soil Sci2147 - 4249Federation of Eurasian Soil Science Societieshttp://ejss.fesss.org/10.18393/ejss.127611910.18393/ejss.1276119Mapping the sensitivity of land degradation in the Ouergha catchment (Morocco) using the MEDALUS approachMohamed Boutallaka Mohamed El Mazi mazimed63@gmail.comYoussef Ben-Brahim Abdelghani Houari 123257-2662022-12-042023-03-282023-04-032023-06-25 Copyright © 2016 The authors and Federation of Eurasian Soil Science Societies Soil degradation is a global phenomenon affecting the productivity of agricultural land. Due to the low vegetation cover and the aggressive climate, Morocco presents a significant case of soil degradation through erosion and desertification. The Ouergha catchment is highly vulnerable to this scourge. The objective of this study was to assess the sensitivity of land to degradation in the Ouergha catchment area. The MEDALUS approach, widely used in the Mediterranean region, was used to assess the sensitivity of soils to degradation/desertification. This approach integrates four indicators that strongly influence this phenomenon (climate, soil, vegetation and human pressure). The results show that more than half of the study area has a medium sensitivity of land to degradation. The critical areas represent 16.2% and correspond to bare land characterized by steep slopes and absence of vegetation. Low sensitivity areas occupy a limited proportion of 21.9% and correspond to wet summits and conserved forest areas. Climate change could lead to a further increase in areas susceptible to degradation.Land degradation, MEDALUS approach, GIS, Ouergha catchment, Morocco.