摘要
通过玻璃水槽试验和径流冲刷试验 ,初步研究了陡坡坡面水流的流速分布和坡面薄层水流冲刷剥离土壤的过程。研究表明 :陡坡薄层水流流速在坡面上并非是呈直线分布 ,而是呈波浪式分布的 ;坡面水流的剥蚀率(Dr)与坡面径流通过坡面的能量损耗 (ΔE)的关系比其与坡面水流的平均切应力 (τ) 的关系密切 ,建立了黄土坡面土壤剥蚀率估算模型 。
Based on the hydraulic experiments on the glass flume and erosion experiments on loess slopes; the velocity of shallow flow distribution on slope and the detachment processes by shallow flow has been researched. The results show that the distribution of the velocity of shallow flow along the downslope show as waves, but the straight line.The relationship between the soil detachment rate (Dr) and the runoff energy consumption (ΔE)of shallow flow on slope is better than the relationship between soil detachment rate (Dr) and the average shear stress (τ) of shallow flow on slope.A soil erosion rate formula is built. The parameters of soil anti erodibility and the critical energy consumption condition of rill erosion occurrence can be obtained from the formula.
出处
《水土保持学报》
CSCD
北大核心
2002年第2期5-7,49,共4页
Journal of Soil and Water Conservation
基金
中国科学院知识创新工程项目"黄土高原区域水土保持环境效应与生态环境建设对策"( KZCX1-10 -0 4)
