An Estimation of Soil Erosion Rate Hot Spots by Integrated USLE and GIS Methods: a Case Study of the Ghiss Dam and Basin in Northeastern Morocco

Soil erosion is a major factor leading to dams’ siltation and reducing their storage capacity. This study mapped the hot spots of soil areas predict erosion/siltation in Ghiss basin/dam (northeastern Morocco). In this context, various data has been prepared geographical information system for estimation by integrating universal loss equation (USLE). The result revealed that rate ranges between0 19 t∙ha−1∙yr−1. Therefore, area are be found upstream, potentially dam over time. To avoid siltation, we suggest terrace farming reforestation spots.