Analysis of dynamic change of desertification is the foundation of desertification control.Based on the multi temporal TM image data in recent years of study areas,by the interpretation of the images,using RS & GIS soft,desertification grade distribution maps of different periods have been obtained.Dynamic change process of desertification was discussed in terms of desertification area change,spatial changes of desertification grades.The results show an obvious downward trend of total desertification area s...
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