采用水文学方法分析表明,无定河流域现有水土保持治理措施对2017年“7·26”暴雨洪水的减水减沙作用有限;通过查勘认识到,林草植被以及梯田在一般降雨情况下减水减沙作用明显,但遇到类似此次的大暴雨,则淤地坝拦沙作用明显;径流主要来自坡面,而泥沙主要来自沟边重力侵蚀、耕种便道和河道淤积物冲刷、河岸及滩地淘刷等。 Hydrological method analysis shows that the existing water and soil conservation measures in the Wudinghe River Basin have a limited effect on water and sediment reduction of the July 26th storm and flood in 2017. Through the survey, it is recognized that vegetation and terraces in the grasslands, under normal rainfall conditions Water and sediment reduction is obvious, but in the event of a heavy rain similar to this, silt dam play a significant role in sediment; runoff mainly from the slope, and sediment mainly from the gully gravity erosion, cultivation and river channel sediment scouring, Beach and other scouring.