Abstract
Taking Du'an County of Guangxi as the study area,using the TM remote sensing images acquired in 1999 and 2009 as the data source,adopting RS and GIS as the technical means and platform,and utilizing the carbonate rock type,land use type,karst landform type,slope of the terrain and population density as the influencing factors,the authors calculated the rocky desertification deterioration index(RDDI) by using the analytical hierarchy process-certainty factor(AHP-CF) method,and then predicted the trend of rocky desertification deterioration quantitatively with RDDI as parameters.The prediction results can provide a scientific basis for making a prospective and specific plan concerning ecological environment protection and recovery and promote the work of rocky desertification prevention and control.
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