The main way of soil erosion are wind erosion and water erosion

which have been studied for long time and primary understood the process. Since the particular monsoon climate and geography position in China

that area of double erosion are widely. Double erosion are not wind erosion plus water erosion simply

it is a complex system in which mutual action and recycle. Double erosion study is little inside and outside nation. The complex of double erosion is described

explain type of double erosion based on expatiating drive factor in China. Area and distributing of double erosion are established after those types studied. See it as a particular region

this is very important to environment repairing and realization strategic of west exploitation.