摘要
为了揭示新疆伊宁市北山坡因降雨引起土壤侵蚀的规律,采用室内人工模拟降雨的方法,依据研究区实际情况,分设5种不同的降雨强度和6个坡度分别进行了试验研究,结果表明:1)侵蚀模数随雨强和坡度的增加而增加,坡度为17°左右时出现跌谷;2)雨滴动能随雨强的增加而增加,变化趋势与天然降雨相似;3)小雨强时,土壤入渗率与坡度呈W型变化趋势,拐点在17°和25°附近;大雨强时,土壤入渗率与坡度呈V型变化趋势,拐点在20°附近。上述研究结果可为探索伊宁市北山坡降雨侵蚀机理和进行土壤侵蚀预报提供依据。
To understand the erosion mechanism of north Brae in Yining. The authors, based on the artificial simulation of rainfall device, set up 5 different rainfall intensifying and 6 different slope gradients according to North Brae in Yi ning. The results of soil erosion experiments show： 1 ） The erosion modulus increased with rainfall intensity and slope gradient, the inflexion is 17°gradient;2）The kinetic energy of raindrop increased with rainfall intensity,consistent with the natural rainfall;3） When rainfall intensity is small, soil permeability can be varied with slope angle ascending. The inflexion is 17° gradient and 25° gradient. When rainfall intensity is bigger, the inflexion is 25° gradient. This research is useful to understand the soil erosion of north brae in Yining.
出处
《石河子大学学报（自然科学版）》
CAS
2008年第4期487-490,共4页
Journal of Shihezi University(Natural Science)
基金
新疆水利水电工程重点学科资助项目(xjzdxk2002-10-5)
关键词
人工模拟降雨
土壤侵蚀
侵蚀模数
artificial simulation of rainfall
soil erosion
erosion modulu
