In Morocco, this erosion is linked to the combined action; the nature and condition of the soil material; relief; vegetation cover; anthropogenic factors (deforestation of landforms, overgrazing, poor agricultural practices and exploitation of clay and limestone quarries) as well as the torrential nature of rainfall which is accentuated by climate change.
The objective of this study is to map the areas vulnerable to water erosion in the Lahmer basin. The approach followed is based on the exploitation of available data in order to map the major factors involved in the erosive process such as precipitation, vegetation cover, soil erodibility and topography as well as their integration into the revised universal loss equation. in soils "RUSLE". using the geographic information system "GIS". and remote sensing based on monthly and annual climate data, terrrain missions, Landsat multidate satellite images and the digital terrain model.
The final results of the water erosion maps show that the year with the highest rate is 2015, which has experienced a significant rainfall compared to previous years, on the one hand, and the zone has become embroiled in a new one. development path that converts it into an industrial zone and has several units for the exploitation of natural resources that abound in the region, such as quarries made of clay and limestone.
Keywords: water erosion, RUSLE, SIG and remote sensing, spatial aproach, high plateau de Settat.