WaTEM/SEDEM (Water and Tillage Erosion Model and Sediment Delivery Model) model was used to simulate sediment yield and spatial pattern of soil erosion for the Shuangfengtan basin after its calibration and validation using the sediment yield data from Lianhuayan and Shimenkan basins. Simulated results showed that the mean annual sediment yield is 24.9 t in the Shuangfengtan basin, with a specific sediment yield of 631 t/（km2·a). Influenced by topography and land uses, deposition occurs in the slope range of 0~10 degree and erosion increases with increasing slope gradients. The erosion rates vary with land use types. For example, the dryland has an erosion rate of 3 345 t/（km2·a) and the grassland an erosion rate of 430 t/（km2·a). The deposition rates are 110 and 83 t/（km2·a) for the forest and shrub lands, respectively. The comparisons of this study to other published results demonstrate that WaTEM/SEDEM gives a satisfactory erosion modeling for the study region. This study would provide a basis of the implementation of erosion control measurements in this region.

WaTEM/SEDEM; soil erosion and sediment yield; topography; land use