Investigation of important and effective factors in soil erosion and sedimentation of Shirin Darreh river using remote sensing and GIS approache

General and active, river type and river deformation in the period 1995 to 2019 and during five evaluation periods including 1995 to 2005 (first period), 2005 to 2010 (second period), 2010 to 2015 (third period), 2015 It was until 2017 (fourth period) and 2017 to 2019 (fifth period). Experimental erosion determination models of EPM and MPSIAC have been used to estimate river changes. The EPM model, based on the principle of scoring two main variables including the intensity and extent of erosion and sedimentation, examines the erosion-susceptibility of the catchment and MPSIAC model of the impact and role of 9 important and effective factors in soil erosion and sedimentation of the catchment Used to estimate sedimentation and erosion status. According to the results, it was found that Shirin Darreh catchment area has a total sedimentation of 831,340 cubic meters per year and sedimentation at the level of 217909.94 tons per year for the EPM model, as well as values ​​of 750.750 cubic meters per year and sedimentation at the level of 5/5. 658509 tons per year with a sediment delivery rate of 38.02 for the MPSIAC model. Also, by validating the experimental models, it was found that the results of the MPSIAC model were more accurate than the EPM in the study area.