Water erosion is one of the most important geomorphic processes and has a direct impact on natural factors
(Soil protection plants such as natural vegetation , human uses , and the dominant land cover ) and ( Surface erosion coefficient of erosion related to the prevailing rock type and regression ) . So the research came to an evaluation Qualitative water erosion geographically , based on the pap – car model of Sherwat Valley Basin , Governorate Salmaniya , by identifying the areas of high erosion , this model works to reduce erosion .
The hydrology of the soil , and it is more realistic to represent a simulation of reality , as it identifies the most fragil and sensitive elements through environmental inputs to remote sensing data that were represented by high-precision digital data obtained from the Russian SASPlanet site, which provides an accuracy of 1 mor less for the ground cover classification (LULC) The digital elevation data (DEM) , as well as the derivation of Vegetation density (NDVI) from data for the American Moon Landasat OLI8 2019 , and the prevailing rock are obtained from Iraqi geological maps , through the application of the model showing that the basin has five levels of water erosion ( Very weak , weak , moderate , severe , very severe varies geographically according to the influence of the factor and location .