论文部分内容阅读
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 ,利用这个关系可以直接得到土壤抗蚀性参数和细沟发生的临界能耗条件
Through the glass tank test and runoff scouring test, the flow velocity distribution on the steep slope and the process of stripping the soil by the thin layer flow scouring were studied. The results show that the laminar flow velocity on the steep slope is not straight but distributed in a wavy pattern. The relationship between the erosion rate (Dr) of the slope water flow and the energy loss (ΔE) of the slope runoff through the slope Which is closely related to the average shear stress (τ) of the flow on the slope surface, an estimation model of the soil erosion rate on the loess slope is established, and the soil erosion resistance parameters and the critical energy consumption conditions of the rill can be obtained directly