The field simulated experiment study was conducted to explore the effect of vegetation types on hillslope runoff,erosion,sediment yield and infiltration,as well as the interrelation among these elements.The mechanism and variance of vegetation types regulating on the runoff and sediment process was clarified.The results showed that the runoff and sediment yield processes in barren land,grass land and slope farmland showed fluctuated trend than forest land,present the characteristic of multi-peak multi-valleys,and the fluctuation of sediment was stronger than runoff under the same rainfall conditions.The cumulative sediment yield and the cumulative runoff were found to be power functionally increased correlated,there were three stages of developing,active and stable in the development of hillslope runoff and sediment yield.The forest land regulates water storage and sediment yield depending on erosion dynamic curtailment,increased infiltration,and runoff curtailment as well as flow alleviation through its rich root networks.Sedimentation retaining was directly achieved by the surface vegetation canopy of grassland.The effectiveness of vegetation structure regulating on runoff and sediment yield was obvious difference,while the effect of vegetation root on soil and water conservation of vegetation was very important.
soil erosionvegetation conditionwater and soil conversation measure function
国家科技期刊平台
NSTL
万方数据
维普
