Application of the Erosion Model (EPM) to Estimate Soil Loss by Water Erosion in the Wadi Fatima Basin using GIS & RS

Soil erosion due to water erosion is one of the most important risks faced by drainage basins, especially in arid and semi-arid areas. With it, this study comes with the aim of estimating the loss of soil due to water erosion annually in the Wadi Fatima basin and determining the levels of erosion in the basin, by utilizing and processing digital resources for satellites and building databases in GIS and remote sensing. And then come up with more accurate results, as the study relied on the applied descriptive approach and applied the Gavrilovic model to estimate soil losses at the cell level. The study concluded that the annual rate of water erosion of the soil of the Wadi Fatima basin was about 25032 m 3 / km 2 / year. It is a high erosion as the entire basin is located under the water erosion of the severe soil. This erosion was concentrated in the areas of very steep mountains mixed with the soil, which consists of pre-Cambrian igneous and intertwined metamorphic rocks, as well as in the stomachs and sides of streams and slopes, in addition to the areas of alluvial deposits in the middle and lower basin of the study area, and erosion is less in the volcanic areas. Where basalt rocks.