modeling gully erosion in dyreh catchment

there are technical and theoretical knowledge of the gully, ditch the clean areas on topographic maps and digital models that will help. however, the ability to use maps (dem) to identify the location and frequency of gully requires knowledge about the process of creating a moat.the present study modeled gulliation prone areas in dyreh river basin done. materials and methods used in this research involve the use of layers of digital elevation model (dem) derived from secondary layers, it can stream power index (spi( and roads in the basin lithology and field data collection was. the data were analyzed in arc gis, and the results were analyzed by chi-square test. based on the results of the study dyreh catchment as the eighth factor, the five factors (slope, horizontal curvature, slope, land use, distance from roads, lithology) were identified as factors in producing dike. among the five factors, slope grade 0 to 4/1 degree of dyreh basin of approximately 33/22% of this has been the most effective in producing dike basin.