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地表径流是坡面水蚀的主要动力。自然坡面的非均匀性导致径流集中 ,由此引起径流流速变化及单宽流量所具有的能量增加。单宽流量所具有的能量 ,与原坡面宽度B和径流集中后宽度b比值的三次方成正比。径流集中导致过流断面土体发生剪切破坏 ,形成明显的水路和侵蚀细沟。介绍了细沟形成的机理。
Surface runoff is the main driving force of water erosion on the slope. Inhomogeneities of natural slopes lead to a concentration of runoff, which results in a change in runoff velocity and an increase in energy in a single-width flow. The energy of a single-wide flow is proportional to the cube of the original slope width B and run-off width b ratio. Concentration of runoff leads to shear failure of the over-current section soils and forms obvious waterways and eroded rills. The mechanism of rill formation is introduced.