Base on the theory of erosion dynamics

geomorphology

hydrology

mechanism of sediment transport

a distributed soil loss model was built and applied in Chabagou watershed in sandy areas of Yellow River by using GIS technique

the model could be used to count the amount of soil loss on watershed loess slope

gully and groove

the model is capable to coupling the runoff process and sediment transport;raised the concept of equivalence estimation roughness coefficient

preliminary solve the problem soil and water conservation project to change runoff

so the model could forecast the benefit on different control plan of soil and water conservation;the soil loss imitation forecast information were extracted use 3S technique;built the definition method of classification template in virtual reality environment to improve the classification precision of remote sensing image

prefect solve the problem to distinguish the phenomenon " the different thing with same spectrum and the same thing with different spectrum".Compare to the soil loss amount measured in Chabagou and Xingzihe watershed

the model could rightly to mirror the rule of watershed soil loss in Yellow River sandy areas.