Estimation of soil erosion and sediment production in Basin of Kasilian, Using Geomorphological method based on MPSIAC model in GIS environment

Erosion and sedimentation as a serious phenomenon in Iran and the diversity of its affecting factors caused empirical methods be applied which were primarily developed for the other regions of the world. These methods were developed based on the number of affecting on the above mentioned phenomenon. Soil erosion causes soil fertility reduction; sedimentation in waterways, irrigation canals and rivers; reduction of the capacity of reservoirs and their life long; increase in flood; environment pollution and blocking roads. The soil as one of the most national capital of each country must be taken concrete actions to protect and better use of it. In order to prevent such a destructive process measures are planned to correct the situation by determining the amount of erosion and sedimentation. In this study, MPSIAC model in GIS environment was applied to estimate the amount of erosion and sedimentation of Kasilian basin. After logging information Layers and mixing layer in GIS, 36 work units were segregated and after the fifth class erosional, the value of sedimentation and erosion in each work units are separately estimated. The total sediment and erosion, respectively, were equal to 43693 tonnes per year and 1747722 tons per year.