摘要
通过玻璃水槽试验和径流冲刷试验 ,研究了坡面径流的流速分布和坡面细沟侵蚀发生的临界条件。研究表明 :径流在坡面上并非是以均匀流形式运动 ,而是以滚波的形式运动的 ,同时本文运用能量守恒原理分析了坡面土壤侵蚀率 (Dr)与径流能耗 (ΔE)之间的关系 ,建立了给定土壤条件下坡面土壤侵蚀率估算模型 :Dr =0 0 0 2 6 (lnΔE -2 )。结果表明坡面土壤侵蚀的发生具有一定的临界能量条件 ,当径流能耗大于 7.38(J)时坡面开始有细沟侵蚀发生。
Based on the experiment of glass flume and the experiment of runoff scouring, the runoff velocity distribution on slope and the critical condition of rill erosion were researched. The results show that the runoff velocity was not the straight line distribution along the downslope, but the kinematic waves distribution. At the same time, the relationship between the soil detachment and the runoff energy consumption was studied by using the law of conservation energy in this article. The soil erosion rate model was built . The rill erosion occurred when the energy consumption exceed 7.38(J)?
出处
《山地学报》
CSCD
2001年第6期551-555,共5页
Mountain Research
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室基金资助 ( 10 5 0 1-6 3)
关键词
坡面
侵蚀率
径流能耗
临界能量条件
黄土坡面
土壤侵蚀
kinematic waves
soil erosion rate
the runoff energy consunption
critical acondition of rill erosion
