Based on the distribution of the hydrological station and it s observation series of sediment information on loess Plateau, the study area was divided into 120 hydrological control area firstly, then according to the different soil erosion type area, the 120 hydrological control area were divided into 292 soil erosion units. The main results are as following: (1) The sediment yield of loess plateau (average condition from 1955 to 1989) are mainly come from the violence erosive area with erosion modulus >...
修改评论