The technologies of RS and GIS were applied to obtain the five evaluation factors including annual precipitation

annual temperature

slope

elevation

and land cover within the Buhahe basin.With spatial modeling and analysis

we obtained spatial distribution of soil erosion within the basin and classified soil erosion into different classes.The results showed that in the study area

the total area of soil erosion was 14 337 km2

of which mild and moderate erosion were dominant

accounting for 54.88% and 20.51% of the total eroded area

respectively.A small portion of the basin has experienced severe erosion

accounts for 0.63% of the total eroded area.