摘要
有降雨影响下的坡面流,多为三维非均匀沿程变量水流,其流速的计算是一个比较复杂的问题,也是研究土壤侵蚀力学机理的关键。本文根据室内人工降雨水槽模拟实验对影响坡面流速诸因子的研究结果,首先从理论上将流速表示为含有达西—维斯巴赫(Darcy—Weisbach)阻力系数f的函数,再根据实验资料建立起不同流态的计算式,进而可计算坡面任一处不同流态的径流速度。
The overland flow affected by rainfall is mostly three-dimensional non-uniform flow which varies a-long its route. Calculation of its velocity is a sophisticated problem, and also is the crux of the research of the dynamic mechanism of soil erosion. Velocity is expressed as a function of Darcy-Weisbach resistance coefficient f. Based on the research results of various factors which affect the overland flow through flume experiment of artificial rainfall in the laboratory, the formula of f for different flow model was established, by which velocities of different flow model at any points in the slope surface could be calculated.
出处
《中国水土保持》
北大核心
1993年第3期21-25,共5页
Soil and Water Conservation in China
关键词
坡面流
流速
水力阻力
计算方法
overland flow flow velocity hydraulic resistance calculation method
