作 者：
李和谋;梁心蓝;赵小东;金洪杰;吴荣文;陈宇曦
关键词：
凸起;凹陷;凹凸并存;产流过程;产沙过程
摘 要：
揭示地表起伏形态对产流和产沙的影响及作用机理,为蓄水保土、调节径流和控制径流提供参考依据。通过野外人工模拟降雨试验,在3种降雨强度(60,90,120 mm/h)下,分析了5种起伏的地表(单凸起、单凹陷、凹凸相间、凹凸相连、光滑)坡面的产流产沙情况。结果表明:(1)在3种雨强下,5种地形的初始产流时间表现为:光滑地表<单凸起地表<单凹陷地表<凹凸相间地表<凹凸相连地表,且产流越早的地表其产流量和径流系数也越高;(2)在3种雨强下,5种地表的次降雨产沙量和产沙强度由小到大依次为:凹凸相连地表<凹凸相间地表<单凹陷地表<光滑地表<单凸起地表,产沙强度越大的地表其产沙过程越不稳定;(3)与光滑地表相比,地表凸起会加剧土壤流失,地表凹陷会减轻土壤流失,且凸起和凹陷组合的地表其减轻土壤流失的效应更显著;(4)降雨强度的增大会削弱不同地表起伏对产流产沙的影响。研究结论为地表起伏类型对坡面产流产沙有重要影响,光滑地表最易产生径流,凸起地表土壤流失最严重,凹凸相连地表蓄水保土效益最好。
译 名：
Effects of Surface Relief on Runoff and Sediment Yield Under Simulated Rainfall Experiments
作 者：
LI Hemou;LIANG Xinlan;ZHAO Xiaodong;JIN Hongjie;WU Rongwen;CHEN Yuxi;College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University;
关键词：
mound;;depression;;mound and depression;;process of runoff;;process of sediment production
摘 要：
In order to study the effects of different surface relief forms on runoff and sediment yield during slope erosion process, five kinds of surface relief treatments(mounds, depressions, Intervals mound and depression, continuous mound and depression, smooth) were set up. The runoff and sediment yield of each treatment under three rainfall intensities(60 mm/h, 90 mm/h, 120 mm/h) by field artificial rainfall experiments were analyzed. The results showed that:(1) Under three rain intensities, the initial runoff time of the smooth surface was the shortest, while the continuous mound and depression surface was the longest. The initial runoff time of intervals mound and depression surface was close to continuous mound and depression surface, while mounds surface was just a little longer than the smooth one. The runoff time of depression surface was in the middle. The shorter the initial runoff time was, the bigger the runoff volume and runoff coefficient were.(2) Under the same rain intensity, the sediment volume and sediment yield intensity of different treatments ranked as: continuous mound and depression surface
