水土保持学报2013，Vol.27Issue(4)：17-22,6.
降雨类型对地表微地形空间变化及产流、产沙的影响
Effect of Rainfall Types on Spatial Variation of Micro-topography, Runoff and Sediment Yield
摘要
Abstract
Based on artificial rainfall experiments,the spatial variation of micro-topography under delayed rainfall and decreased rainfall was studied,and their effects on runoff and sediment yield were investigated.The results showed that the variation range of surface elevation reduced and concentrated on (-5)～5 mm along with rainfall time.The maximum value of elevation variation appeared in the lower part of slop surface.In whole experimental plot,the area ratio of micro-topography decay was up to 48.56％,45.28％ and 63.14％ respectively under delayed rainfall,and it was up to 38.59％,36.58％ and 35.12％ respectively under decreased rainfall.The origin of fourth and fifth order streams moved to upper gradually under delayed rainfall,and it stabilized at middle slope location under decreased rainfall.The total runoff amount showed little differences for different rain types,but the sediment yield under delayed rainfall was 35.83％ higher than that under decreased rainfall.关键词
雨型/地表微地形/DEM/水系/土壤侵蚀Key words
rainfall types/ micro-topography/ DEM/ water system/ soil erosion分类
农业科技引用本文复制引用
秦凤,郑子成,何淑勤,李廷轩,孔祥东..降雨类型对地表微地形空间变化及产流、产沙的影响[J].水土保持学报,2013,27(4):17-22,6.基金项目
国家自然科学基金项目(40901138,41271307) （40901138,41271307）
四川省学术和技术带头人培养资金资助项目(2012) （2012）
四川省科技厅应用基础项目(2010JY0083) （2010JY0083）
黄土高原土壤侵蚀与旱地农业国家重点实验室项目(10501-283) （10501-283）
