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| 降雨强度、坡度及坡长对细沟侵蚀的交互效应分析 | |
| 引用本文： | 李君兰,蔡强国,孙莉英,陈俊杰.降雨强度、坡度及坡长对细沟侵蚀的交互效应分析[J].中国水土保持科学,2011,9(6):8-13. |
| 作者姓名： | 李君兰 蔡强国 孙莉英 陈俊杰 |
| 作者单位： | 1. 中国科学院地理科学与资源研究所陆地水循环与地表过程重点试验室,100101,北京 2. 中国科学院地理科学与资源研究所陆地水循环与地表过程重点试验室,100101,北京;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,712100,陕西杨凌 3. 中国科学院地理科学与资源研究所陆地水循环与地表过程重点试验室,100101,北京;华中农业大学资源与环境学院,430070,武汉 |
| 基金项目： | 国家自然科学基金“细沟侵蚀发育过程及空间形态的三维数字模拟”(40971165); 中国科学院水利部黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金课题“黄土坡面细沟侵蚀发育过程影响因素研究”(10501-265) |
| 摘 要： | 为了对细沟侵蚀影像因素的交互效应分析方法进行探索,通过2个降雨强度(1.5和2 mm/min)、4个坡度(10°、15°、20°、25°)和2个模拟坡长(5、10 m)进行室内模拟降雨试验,采用回归分析的方法来探讨降雨强度、坡度及坡长对坡面产流、产沙及水流速度是否存在交互效应。结果显示:1)以单宽产流速率作为试验中坡面产流的表征指标,对其有显著影响的是降雨强度、坡度的主效应,以及坡长坡度的交互效应;2)含沙量是由降雨强度及坡度共同作用的结果;3)细沟间片流流速主要受降雨强度、坡度、距坡顶距离主效应的促进影响,无交互效应存在,而细沟间水流的变化中不仅有3因素的正向主效应影响,而且坡度与距离的交互效应也对其影响显著,但此交互效应表现为负。 |
| 关 键 词： | 交互效应 细沟侵蚀 产流 流速 |
Analysis of interaction effects of rainfall intensity,slope degree and slope length on rill erosion |
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| Li Junlan,Cai Qiangguo,Sun Liying,Chen Junjie.Analysis of interaction effects of rainfall intensity,slope degree and slope length on rill erosion[J].Science of Soil and Water Conservation,2011,9(6):8-13. | |
| Authors: | Li Junlan Cai Qiangguo Sun Liying Chen Junjie |
| Institution: | Li Junlan1,Cai Qiangguo1,2,Sun Liying1,Chen Junjie1,3(1.Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,100101,Beijing,2.China National Laboratory of Soil Erosion and Dryland Agriculture on the Loess Plateau,Institute of Soil and Water Conservation,Ministry of Water Resources,712100,Yangling,Shaanxi,3.College of Resources and Environment,Huazhong Agriculture Universit... |
| Abstract: | Using simulated rainfall experiment under different conditions（rainfall intensity： 1.5 and 2 mm/min,slope gradient： 10°,15°,20°and 25°,slope length： 5 and 10 m）,the interaction effects of slope,rainfall intensity and slope length on rill erosion were studied by establishing the regression models.The experimental results indicated that： Runoff producing rate per unit width was chosen as the characteristic index of runoff,both rainfall intensity and slope had significant positive effects on it,while the interaction effect of slope and slope length was significant as well.Changes of sediment concentration were mainly determined by slope gradient and rainfall intensity,while the effect of slope length was not significant.Rainfall intensity,slope and slope length had positive effect on velocity of interrill sheet flow,while the effects of these factors on velocity of rill flow were also significant,in addition,the interaction effect of slope gradient and slope length has a significant negative effect on the velocity of rill flow. |
| Keywords: | interaction effect rill erosion runoff flow velocity |
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