The sediment yield potential Sorhe drainage basin (Kordan river) using MPSIAC

Sorhe basin with area of 36.43 km is located at northeastern of Karaj. Kahar With the age of Pre cambrian formation is also the oldest available stone in this basin and the newer stone units belong to Quaternary period. Stone units in Karaj formation cover more than 50% area of total range. This region is generally consisting of sediment stones. 6 main factors including geology, climate, tectonic, slope, plant cover and weathering influence the level of erosion of rock units. In this research the must important effective factor on erosion will be studied. using Arc GIS software, the level of sediment yield map and investigation of formation's erosion at Touchal basin was specified. Most important factors on erosion in this region are geology, tectonic and slope. based on MPSIAC related tables, maps get be prepared and finally the level of sediment at Sorhe basin will be achieved. Results of tests and studies by GIS certified that stone units of Sorhe basin are classified within 5 erosion groups in which Quaternary maps had very high erosion and Soltanieh formation had very low sediment. Surface geology was the must effective factor on Sorhe basin level of sediment including it was 889/27 at this basin.