| 黄土坡面细沟径流过程试验 |
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| 引用本文： | 谭贞学,王占礼,谭晓,刘俊娥,袁殷,钟寒辉.黄土坡面细沟径流过程试验[J].中国水土保持科学,2010,8(5):24-29. |
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| 作者姓名： | 谭贞学 王占礼 谭晓 刘俊娥 袁殷 钟寒辉 |
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| 作者单位： | [1]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,陕西杨凌712100 [2]钦州市水土保持监测分站,广西钦州535000 [3]西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 |
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| 基金项目： | 国家自然科学基金，国家973计划课题，中科院知识创新工程重要方向项目课题，黄土高原土壤侵蚀与旱地农业国家重点实验室自主研究课题 |
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| 摘 要： | 采用具有定流量人工放水的组合小区模拟降雨试验方法,对同坡度不同降雨强度及同降雨强度不同坡度条件下的黄土坡面细沟径流过程进行模拟试验研究,结果表明:1)不同降雨强度下,细沟径流率随径流过程的变化在3个大降雨强度下为先逐步增大随后转为稳定的变化过程,2个小降雨强度下变化较平缓,稍有后期大于前期的趋势,皆可用幂函数方程描述;2)不同坡度下,细沟径流率随径流过程的变化表现为随径流历时的增长而递增,15min以后接近于稳定,变化过程一致,可用幂函数方程很好地描述;3)不同坡度下细沟径流率随径流过程的变化与不同降雨强度下总体上具有相似性,都随径流历时增长呈先增大后趋于稳定或稍有后期大于前期的变化趋势,但细沟径流率随径流过程的增加速率在不同坡度下比不同降雨强度下大;4)同坡度下,细沟径流深随降雨强度增大而增大,可用对数方程很好地描述;同降雨强度下,细沟径流深随坡度增大相应增加,可用对数方程很好地描述;细沟径流深随降雨强度及坡度的变化可用二元对数方程很好地描述。
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| 关 键 词： | 黄土 坡面 细沟 径流 组合小区 |
Experimental study of rill runoff processes on loess hillslope |
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| Tan Zhenxue,Wang Zhanli,Tan Xiao,Liu June,Yuan Yin,Zhong Hanhui.Experimental study of rill runoff processes on loess hillslope[J].Science of Soil and Water Conservation,2010,8(5):24-29. |
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| Authors: | Tan Zhenxue Wang Zhanli Tan Xiao Liu June Yuan Yin Zhong Hanhui |
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| Institution: | 1.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,712100,Yangling,Shaanxi;2.Qinzhou Sub-station of Soil and Water Conservation Monitoring,535000,Qinzhou,Guangxi;3.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau,Northwest A＆F University,712100,Yangling,Shaanxi： China) |
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| Abstract: | With multi-plot-based experiments of simulated rainfall and the addition of a steady in-flow at the top of the multi-plot system,the runoff processes of rill on loess hillslope are studied under five different rainfall intensities with same slope and five different slopes with same rainfall intensities.The main findings are as follows： 1） A power equation can be used to describe rill runoff rate changing with runoff process under different rainfall intensities.The overall trend for the three bigger rainfall intensities is a rise in the beginning and then goes to the relative stability,while it shows little change for the relatively smaller rainfall intensities with slightly rise later than the early.2） Changes in rill runoff rate with runoff process at different slopes behave in the same way as those under different rainfall intensities,with slightly rise later than the early,and also can be described by power equation.3） Rill runoff rate have the same trend of increasing firstly and stabilizing gradually with runoff processes under rainfall intensity and slope,but with the slope increase,the runoff rate increases more rapidly.4） Rill flow depth increases with rainfall intensity and slope,and logarithmic equation can be used for different rainfall intensities and different slopes,while a dual logarithmic equation,for the two factors. |
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| Keywords: | loess hillslope rill runoff multi-plot system |
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