| 黄土高原陡坡土壤侵蚀特性试验研究 |
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| 引用本文： | 郑良勇,李占斌,李鹏. 黄土高原陡坡土壤侵蚀特性试验研究[J]. 水土保持研究, 2003, 10(2): 47-49 |
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| 作者姓名： | 郑良勇 李占斌 李鹏 |
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| 作者单位： | 中科院水利部水土保持研究所, 陕西, 杨陵712100 |
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| 基金项目： | 本文受中国科学院知识创重大项目"西部生态环境演变与水土资源可持续利用研究"支持,课题编号KZCX1-10-04. |
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| 摘 要： | 通过室内冲刷模拟试验对黄土高原陡坡土壤侵蚀特性进行系列研究.结果表明,陡坡径流平均流速随径流量和坡度的增大呈波动趋势增加.坡面径流平均含沙率,平均输沙率和平均剪切力均随流量的增加波动增加,随坡度的增加而呈抛物线形式变化,临界坡度值出现在21°和24°之间.坡面径流平均输沙率与平均剪切力之间量良好的线性关系.本研究对深入了解陡坡土壤侵蚀机理,合理确定退耕坡度具有重要意义.
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| 关 键 词： | 陡坡 土壤侵蚀 临界坡度 |
| 文章编号： | 1005-3409(2003)02-0047-03 |
| 修稿时间： | 2002-09-30 |
Experimental Study on Soil Erosion Characteristics of Steep Slope on Loess Plateau |
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| ZHENG Liangyong,LI Zhanbin,LI Peng. Experimental Study on Soil Erosion Characteristics of Steep Slope on Loess Plateau[J]. Research of Soil and Water Conservation, 2003, 10(2): 47-49 |
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| Authors: | ZHENG Liangyong LI Zhanbin LI Peng |
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| Affiliation: | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Minisity of Water Resoures, Yangling 712100, Shanxi, China |
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| Abstract: | The results of runoff scouring experiments show that average flow velocity of steep slope increased with the discharge of flow and slope gradient.The average silt content rate,the average sediment transport rate and the average sheer stress all increased when the discharge of flow increased,they changed in parabolic form with the increase of slope gradient and the critical gradient is between 21°and 24°.The relationship between the average sediment transport rate and the average sheer stress is linear.This research is useful to understand the erosion mechanism of steep slope. |
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| Keywords: | steep slope soil erosion critical slope gradient |
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