Estimation and Zoning Soil Erosion using the Analysis Network Process and GIS (Case Study: Ghale Chai Basin)

Identify factors contributing to the spread of soil erosion, and zoning is an important tool to manage and control this phenomenon and to determine appropriate ways are to deal with spreading this phenomenon. In this research, using analysis network process model and GIS has been estimated zoning map of soil erosion in the catchment tea castle in West, East Azerbaijan Province. For this purpose, by examine the sources and expert opinion, effective factors such as slope, aspect, lithology, land use, normalized difference vegetation index (NDVI), annual precipitation and soil is provided of the geographic information system environment. Then, using Arc GIS software and extracted coefficient, the analysis network process prepared to zone map soil erosion and in five classes: very high, high, medium, low and very low. The results showed that 37.12 percent of the area that includes 118.56 square kilometers, is located in risk classes the high and very high. Furthermore, necessary to explain that in the southern and central parts of the basin is the amount of soil erosion high. These areas showed critical situations and acute erosion. And due to dam construction, Ghale Chai should be placed the priority programs and plans of soil conservation and watershed management.