Soil water erosion is one of the most important factors of soil degradation. Soil erosion is a process that causes loss of big amounts of nutrients and organic matter from the topsoil layer and pollutes the surface water bodies. The USDA- WEPP (Water Erosion Prediction Project erosion model) represents a new generation technology for estimating soil loss by water erosion and sediment delivery from hillslopes and small watersheds. The main purpose of this study was evaluating the capability of WEPP model.