摘要
植被根系提高土壤渗透性和抗侵蚀性,植被盖度越大径流起始时间越长,植被提高边坡的入渗率和减少土壤流失相互促进,共同作用的结果是保持水土,所以植被增加边坡降雨入渗的作用是十分显著的。大多数植物的根系分布在浅层,根际区土壤储水能力强,由于植被对根际区下层土壤的渗透性影响不大,而且认为植被对降雨入渗对根际区土壤水分的影响明显,而对边坡根际区下层土壤水分影响不明显,植被增加边坡降雨入渗不影响边坡深层稳定性。
Because of the effects of plant roots on soil infiltration and anti-scourability,the time of runoff be- ginning becomes longer with the increase of the vegetation coverage.It discloses the mechanism of interaction between enhancement of precipitation infiltration and control soil loss by vegetation,resulting in water and soil conservation. So enhancement of precipitation infiltration by vegetation is notable.Because the root zones of most plants are distrib- uted generally in shallow depth,it has high water storage capacity in the root zone soil and there is no effect by vege- tation on permeability underside this root zone.The study of this article shows that rainfall stored in root zone soil dosn't infiltrate underside the root zone of vegetation cover slope,so there is no effect on deep seated stability of the slope.
出处
《地下空间与工程学报》
CSCD
2007年第z1期1274-1278,1304,共6页
Chinese Journal of Underground Space and Engineering
关键词
植被
降雨入渗
深层渗漏
深层稳定性
vegetation cover
rainfall infiltration
deep percolation
deep seated stability
