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应用不同时期的ＴＭ图像，分别解译编制两期土壤侵蚀类型图。在地理信息系统（ＧＩＳ）支持下，建立空间数据库。获得淳化县土壤侵蚀动态图和动态转移数据矩阵，可以定位、定性、定量地显示前后两期间土壤侵蚀动态演变格局。结果表明，研究区同时存在着“一边治理，一边破坏”的双重现象。
Application of TM images of different periods, respectively, interpretation of the preparation of two types of soil erosion map. Establish a spatial database with the support of a geographic information system (GIS). The dynamic map of soil erosion and the data of dynamic transfer in Chunhua County can be obtained, which can locate, qualitatively and quantitatively display the dynamic evolution of soil erosion during the two periods. The results show that there is a double phenomenon of “governance while destruction” in the study area.