根据祁连山寺大隆林区内不同植被类的12个径流观测场5年的观测资料,研究了降雨对不同程度放牧草地水土流失的影响。结果发现:降雨强度是影响地表产流的首要因子;有林地各植被类型小区均不产生水土流失现象;与中轻度型放牧草地相比,在相同降雨条件下,过度放牧草地的径流系数变化最显著,其年径流量及土壤年流失量皆最大,是流域内水土流失的主要源地。 According to the observation data of 12 runoff observing fields of different vegetation types in Dalonglin area of ​​Qilian Temple in 5 years, the effects of rainfall on soil erosion of grazing grasslands with different degrees were studied. The results showed that rainfall intensity was the primary factor affecting the surface runoff. Soil erosion was not found in any vegetation type in the forestland. Compared with the moderate grazing grassland, the runoff coefficient of overgrazing grassland under the same rainfall condition Most notably, its annual runoff and annual soil loss are the largest, is the main source of soil and water loss within the basin.