摘要
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 motive power of water erosion of slope surface. The uneven natural slope surface has resulted in concentrated runoff, causing the variations of velocity and increased energy of unit width discharge. The possessed energy of unit width discharge is direct proportion with the cube of ratio of original slope width B to width b after runoff concentrated. The concentrated runoff has caused shearing damage of flowing section soil and forming remarkable waterways and rill erosion. The paper introduces the mechanism of rill formation.
出处
《中国水土保持》
北大核心
2003年第8期16-17,共2页
Soil and Water Conservation in China
关键词
土壤侵蚀
面蚀
细沟侵蚀
黄土高原
soil erosion
surface erosion
rill erosion
loess plateau
