坡面草被覆盖对坡沟侵蚀产沙过程的影响(英文)

编号 zgly0001585979

文献类型 期刊论文

文献题名 坡面草被覆盖对坡沟侵蚀产沙过程的影响(英文)

作者 李勉  姚文艺  丁文峰  杨剑锋  陈江南 

作者单位 YellowRiverInstituteofHydraulicResearch  KeyLabofYellowRiverSedimentResearchofMinistryofWaterResources  YangtzeRiverScientificResearchInstitute 

母体文献 Journal of Geographical Sciences 

年卷期 2009年03期

年份 2009 

分类号 S157 

关键词 grasscoverage  hillslope-gullysideerosionsystem  scouringexperiment  sedimentyield 

文摘内容 By scouring experiments,the changeable process and characteristics of sediment yield in the hillslope-gully side erosion system with different coverage degrees and spatial locations of grass were studied.Five grass coverage degrees of 0,30%,50%,70%,90%,three spatial locations of grass(upslope,mid-slope,low-slope) and two water inflow rates of 3.2 L/min,5.2 L/min were applied to a 0.5 by 7 m soil bed in scouring experiments.Results showed that the sediment yield decreased with the increase of grass coverage degree at 3.2 L/min water inflow rate in scouring experiments and the sediment yield with different grass locations on the sloping surface was in the order of upper > middle > lower.At 5.2 L/min water inflow rate,the differences of sediment yield among various grass coverage degrees were increased,whereas the changeable tendency of sediment yield with different grass locations on the whole sloping surface was not very obvious.The proportion of sediment yield from the gully side increased in an exponential relationship with the increase of grass coverage degree.When the grass was located on the lower position of hillslope,the influence for accelerating gully erosion is the greatest.