Lithological Difference in Rocky Desertification for Homogenous Carbonate Areas in Guizhou Province,China

The information about rocky desertification was developed from the remote sensing data.Six catchments in different landform areas were chosen to analyze the differences in rocky desertification intensity among different rock types.The results showed that ecological environments of the catchments are sensitive to variations in regional geomorphology in homogenous limestone regions and the frequency of desertification is higher and the intensity is enhanced with changes in physiognomy from a plateau region to a valley one.By contrast,desertification areas in the catchments of homogenous dolomite regions are vast and severe,those in valleys are vast but not severe,and those in plateau areas have the best ecological environments.Based on the results,the author suggests that spatial territorial differences should be regarded as a top-priority in the restoration of catchments in the desertified regions.In the first place,the homogenous dolomite region is prior to the homogenous limestone one which is classified in terms of its lithology;secondly,the plateau region is prior to the valley region in homogenous limestone regions;and by contrast,the slope region is prior to the plateau one in homogenous dolomite regions.