Watershed features derived from 1∶50 000,10～100 m horizontal resolution grid DEM of Wan-chuan River watershed between lithoid mountainous region and loess hill region are statistically analyzed,such as watershed area,stream length,channel slope,total length of stream,density of stream network,mean slope of watershed.

The author regarded a grid cell as a small catchment,based on which runoff calculation was performed by using Xin anjiang model,and then channel routing was performed by using the Muskingum-Cunge method,thus,a distributed hydrological model with high precision wa.