برآورد میزان فرسایش و رسوب در حوزه سد وشمگیر با استفاده از روش پتانسیل فرسایش (EPM)

Climate change affects temperature and precipitation patterns, infiltration rate and soil moisture and land use. Runoff, soil erosion and sediment are also affected by these climate changes.This research was conducted with the aim of evaluating the EPM model in estimating the amount of erosion and sedimentation in Voshmgir dam area. In order to show the advantages of this model and its application in watershed management, the required information of the watershed was collected within the Voshmgir dam watershed. In order to implement the EPM model, work units were prepared digitally. Then, using four factors, the observed erosion coefficient of the watershed (Ψ), the land use coefficient (Xa), the average slope of the basin (I) and the coefficient of soil and rock resistance to erosion (Y) in the EPM model, the erosion intensity coefficient and finally the amount Erosion and sedimentation of the sub-basins were calculated and based on the amount of erosion and production sediment, the sub-basins were prioritized. The results of this model showed that Tilabad sub-basin showed the lowest amount of erosion with 768.8 and Kal Aji sub-basin with 4570.1 tons per square kilometer per year showed the highest amount of erosion in this model. Also, the middle basin with 372.4 has the lowest amount of sediment and the Ghornaveh-Shordareh sub-basin with 1640.8 tons per square kilometer per year showed the highest amount of sediment in this model.