岩土力学2023，Vol.44Issue(12)：3435-3447,13.DOI:10.16285/j.rsm.2022.1936
不同坡度植被边坡降雨入渗和径流侵蚀规律的试验研究
Test on rules of rainfall infiltration and runoff erosion on vegetated slopes with different gradients
摘要
Abstract
A large-scale rainfall experiment was carried out to investigate the rules of rainfall infiltration and runoff erosion of vegetated slopes with different gradients.The parameters such as slope water content and soil and water loss were monitored in real-time.The effects of slope gradient on rainwater infiltration,slope runoff and soil erosion were quantitatively analyzed.The results show that under a continuous rainfall condition of 4 h and 60 mm/h,the cumulative rainwater infiltration of bare soil slopes with 1∶2,1∶1.75,and 1∶1.5 are 70.6％,80.4％,and 92.3％those of vegetated slopes with the same slope gradient.Vegetation cover will accelerate the rainwater infiltration rate and increase the cumulative rainwater infiltration of the slope.The smaller the slope gradient of the vegetated slopes,the faster the rainwater infiltration rate and the greater the cumulative rainwater infiltration,while the bare soil slopes are the opposite.Vegetation cover can effectively reduce runoff rate and cumulative runoff.The smaller the slope gradient,the more significant the effect of reducing runoff.Compared with the bare soil slopes with the same gradient,the vegetated slopes of 1∶2,1∶1.75,and 1∶1.5 reduce runoff by 53.11％,32.56％,and 17.73％,respectively.The sediment content of soil and water loss in vegetated slopes is less than 0.1％.Vegetation cover can effectively restrain soil erosion on the slope.The larger the bare soil gradient is,the more serious the slope erosion is.The soil erosion unit areas of 1∶2,1∶1.75 and 1∶1.5 bare soil slope are 3.623,5.710,and 11.295 kg/m2,and the sediment contents of soil and water loss are 3.06％,4.29％,and 7.34％,respectively.Based on the test results,the relationship between the total amount of mud and sediment yield of bare soil slope y and slope gradient x and rainfall durationt is y=0.002 8t-0.67x4.11t0.0647.关键词
坡度/植被边坡/雨水入渗/坡面径流/土壤侵蚀Key words
slope gradient/vegetated slope/rainfall infiltration/slope runoff/soil erosion分类
建筑与水利引用本文复制引用
黄少平,陈俊毅,肖衡林,陶高梁..不同坡度植被边坡降雨入渗和径流侵蚀规律的试验研究[J].岩土力学,2023,44(12):3435-3447,13.基金项目
国家自然科学基金联合基金重点项目(No.U22A20232) （No.U22A20232）
国家自然科学基金面上项目(No.52078195) （No.52078195）
湖北省自然科学基金创新群体项目(No.2020CFA046) （No.2020CFA046）
湖北省自然科学基金(No.2022CFB833).This work was supported by the Key Program of Joint Funds of the National Natural Science Foundation of China(U22A20232),the General Program of National Natural Science Foundation of China(52078195),the Innovation Group Project of Hubei Science and Technology Department(2020CFA046)and the Natural Science Foundation of Hubei Province(2022CFB833). （No.2022CFB833）
