Soil erosion risk assessment of zaozhuang based on GIS and RS technology

摘要

According to the characteristics of soil erosion, with the support of geographical information system (GIS), the author use the method of soil erosion factor weight evaluation to achieve a assessment study of the potential risk of soil erosion. First of all, the author defined the impact factor on soil erosion and set up the index model; Second, the extraction methods of impact factor was discussed in the paper; according to soil erosion assessment standard promulgated by MWR (Ministry of Water Resources), the soil erosion risk was divided into 5 levels; finally, in order to show the size of the soil erosion risk of the area, the author put forward the soil erosion risk index. To Zaozhuang, for example, by comprehensive considering the four elements-terrain slope, the vegetation coverage, the underlying surface attribute and the soil type, the author studied the risk assessment of the soil erosion and spatial distribution characteristics in this region. The analysis and evaluation results can be meaning for the prevention and control of soil erosion, environmental protection, ecological maintaining and the rational development and utilization of land resources in Zaozhuang to provide a scientific basis in the future.