عنوان مقاله [English]
Including water resources and soil erosion processes that threaten the country. Erosion process is very complex and many factors are involved in it Kh most important climatic factors, land slope, PvshshGyahy, and how land is managed. Due to lack of information on the area of the experimental method, four methods MPSIAC, EPM, FAO, BLM selection and evaluation of these four models in the domain of Kohgiluyeh Boyer Ahmad (the area between the castle) was performed. Cleans four basic models of erosion and deposition model to quantify and the other two as a qualitative estimate erosion. Based on annual erosion rate MPSIAC 59/3 tons per hectare per year and areas for EPM 76/2 tons per hectare per year, respectively. In the method, FAO, BLM final scores for all domains related to the erosion of 9/55 and 9/47, respectively, the average was calculated.