In Iran.one of the extensively used methods for determine the values of erosion and sediment is Model EPM.But according to the reports, So, in this study attempted to determine the values of erosion intensity and erosion intensity mapping two methods based on Fornier and factorial scoring method to compare the EPM in Mazlqan watershed semiarid have been done. The results of the investigation indicate that factorial scoring method due to the relative difference to compare with EPM model with 25 percent of watershed management in the filed of study towards Fornier study method are appropriate, differences between relative amounts of the test methods can be in the structure therefore recommended to the method of mapping and prioritizing watershed areas critical of the country’s semi-arid gully erosion are lacking about are used.