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| 黄土坡面细沟侵蚀过程 | |
| 引用本文： | 谭贞学,王占礼,王莎,刘俊娥.黄土坡面细沟侵蚀过程[J].中国水土保持科学,2012,10(6):1-5. |
| 作者姓名： | 谭贞学 王占礼 王莎 刘俊娥 |
| 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,712100,陕西杨凌;钦州市水保监测分站,535000,广西钦州 2. 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;西北农林科技大学水土保持研究所,712100,陕西杨凌 3. 西北农林科技大学水土保持研究所,712100,陕西杨凌;西北农林科技大学资源环境学院,712100,陕西杨凌 |
| 基金项目： | 国家自然科学基金"黄土坡面细沟侵蚀过程组合小区试验研究"，"黄土坡面细沟侵蚀关键参数及其耦合关系试验研究" |
| 摘 要： | 采用具有定流量放水组合小区模拟降雨试验方法,对黄土坡面细沟侵蚀过程进行模拟试验。结果表明：不同坡度和不同降雨强度下,细沟侵蚀率都呈现随径流变化过程的递增而增大的趋势,并且幂函数方程可以较好地模拟出其变化过程,同时在径流变化过程中,不同坡度下细沟侵蚀率随径流过程变化的递增速率总体上大于不同降雨强度下的递增速率;细沟侵蚀模数随坡度及降雨强度的增大皆增大,可分别用对数方程及指数方程很好地描述,坡度及降雨强度对细沟侵蚀模数的综合作用可用二元幂函数方程很好地描述;试验条件下,水流切应力是细沟侵蚀过程发生发展的动力根源。 |
| 关 键 词： | 细沟侵蚀 侵蚀过程 组合小区 切应力 黄土坡面 |
Rill erosion processes on loess hillslope |
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| Tan Zhenxue , Wang Zhanli , Wang Sha , Liu Jun'e.Rill erosion processes on loess hillslope[J].Science of Soil and Water Conservation,2012,10(6):1-5. | |
| Authors: | Tan Zhenxue Wang Zhanli Wang Sha Liu Jun'e |
| Institution: | Tan Zhenxue1,2,Wang Zhanli1,3,Wang Sha3,4,Liu Jun’e3,4(1.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Science and Ministry of Water Resources,712100,Yangling,Shaanxi;2.Qinzhou Sub-station of Soil and Water Conservation Monitoring, 535000,Qinzhou,Guangxi;3.Institute of Soil and Water Conservation,Northwest A&F University,712100,Yangling,Shaanxi; 4.School of Resources and Environment,Northwest A&F University,712100,Yangling,Shaanxi:China) |
| Abstract: | Based on multi-plot-based experiments of simulated rainfall with steady in-flow rate,the erosion processes of rill on loess hillslope were simulated.Results show that：Power functions could preferably describe the rise trend of rill erosion rate with increasing runoff under different slopes and rainfall intensities,especially under different slopes.Rill erosion modulus increases with increasing slope and rainfall intensities,which could be described by exponential equation for different slopes,logarithmic equation for different rainfall intensities,and dual power equation for different slopes and rainfall intensities at the same time.Flow shear stress is the dynamic source for the development of rill erosion processes. |
| Keywords: | rill erosion erosion processes multi-plot shear stress loess hillslope |
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