摘要
通过 8组坡度、5种水深及 5种糙率情况下坡面薄层径流流态变化特征的实验研究 ,得出薄层径流的临界雷诺数为 10 0 0 ,对应的径流属层流时 ,水深上限为 3m m ,通过水深、糙率及坡度对雷诺数作用特征分析可知 ,雷诺数与水深、坡度的变化成正比 ,与糙率的变化成反比 ;水深的作用明显大于后两者 ,影响因子共同作用下 ,雷诺数的变化规律可用公式 Re=2 .331H1 .41 n- 0 .973S0 .486 - 2 88.17来描述。
Changes of the thin runoff flow in slopes depths and coarse degrees were discussed.The results showed that the critical value of Reynolds under 5° slope degree and 3 mm water depth when runoff flow was stratified.The value of Reynolds was directly proportional to water depths and slope degrees,but indireetly proportional to coarse degree.Effect of water degree on it largely exceeded others. A calculation formula of Reynolds value is as follows: Re =2.331 H 1.41 n -0.973 S 0.486 -288.17
出处
《水土保持研究》
CSCD
2000年第1期30-32,共3页
Research of Soil and Water Conservation
基金
国家"九五"重点科技攻关计划项目!编号为96-004-05 -07
关键词
薄层径流
侵蚀
雷诺数
坡面
thin runoff flow erosion Reynolds value
