supported by the National Basic Research Program of China (973 Program) (Grant No. 2006CB403200);the National Natural Science Foundation of China(Grant No. 41001162);Knowledge Inno-vation Project of the Chinese Academy of Sciences (Grant No. KZCX2-YW-306);Provincial Governor Foundation of GuiZhou (Grant No. 2010);Opening Fund of State Key Labo-ratory of Environmental Geochemistry(Grant No. SKLEG9008);National Key Technology R & D Program (Grant Nos. 2006BAC01A09 and 2008BAD98B07)
The existing traditional methods of assessing the rates of soil loss have many limitations and are difficult to apply in the karst areas of Southwest China. Karst depressions comprise geomorphologically important sour...