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| Relationship between soil loss and rockydesertification in karst areas--Taking Anshun city, Guizhou province as an example |
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| Abstract: |
| This paper took typical karst areas Anshun city of Guizhou as an example, using ASTER remote sensingimage as the data source, and studied on the coupling relationship between soil loss and rocky desertification according tothe classification standard of “techniques standard for comprehensive control of soil erosion and water loss in karst region”.The results showed that, there was strong coupling relation between soil loss and rocky desertification in Anshun city, theoccurrence rate and degree of rocky desertification in non-soil loss areas and lower grade soil loss areas were higher than
those of soil loss areas and high grade soil loss areas. The occurrence rate of soil loss in non-karst areas was 16.9% higherthan that of karst areas, the occurrence rates of soil loss were 39.4% in non -rocky desertification and 36.8% indesertification area, and the occurrence rate of soil loss in lower grade rocky desertification areas was 27.4% higher than that of high grade rocky desertification areas. Rocky desertification was more likely to happen in the non-soil loss and lowgrade soil erosion areas, and the occurrence rate of soil loss was higher in non-karst area, non rocky desertification areaand the low grade rocky desertification area. |
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