Processes of Erosion and Sediment Yield for Disturhed and Undisturhed Soils

QIN Bai-shun; LI Zhan-bin; LIU Hai-bo

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Processes of Erosion and Sediment Yield for Disturhed and Undisturhed Soils

- Processes of Erosion and Sediment Yield for Disturhed and Undisturhed Soils
- Bulletin of Soiland Water Conservation Vol. 32, Issue 5, Pages: 78-81(2013)
- 作者机构：
  
  1. 西安理工大学西北水资源与环境生态教育部重点实验室,陕西,西安,710048
  2. 北京水保生态工程咨询有限公司,北京,100053
  3. 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
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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QIN Bai-shun, LI Zhan-bin, LIU Hai-bo. Processes of Erosion and Sediment Yield for Disturhed and Undisturhed Soils[J]. Bulletin of Soiland Water Conservation, 2013, 32(5): 78-81.
DOI：

QIN Bai-shun, LI Zhan-bin, LIU Hai-bo. Processes of Erosion and Sediment Yield for Disturhed and Undisturhed Soils[J]. Bulletin of Soiland Water Conservation, 2013, 32(5): 78-81. DOI：

摘要

采用野外模拟降雨试验，对扰动土与原状土的土壤侵蚀规律进行了研究。结果表明，原状土坡面含沙量呈先下降后波动的过程，扰动土径流含沙量在坡度5°，11°时均呈上升-下降后波动的过程。在坡度相同，雨强相近的情况下，扰动土坡面径流含沙量大于原状土。前期原状土产沙量大于扰动土，后期扰动土产沙量大于原状土。扰动土产沙量大于原状土的时间点随着坡度的增加而提前。产沙速率达到稳定后，扰动土产沙速率大于原状土，差距随着坡度的增大而增大。

Abstract

Erosion processes of disturbed and undisturbed soils were studied by simulated rainfall experiment Results showed that sediment concentration for undisturbed soil decreased first and then fluctuated

while sediment concentration for disturbed soil increased first

then decreased and fluctuated at last.At the sam slope gradient and rainfall intensity

sediment concentration for disturbed soil was greater than that for urdisturbed soil.In early stage

sediment yield for undisturbed soil was greater than that for disturbed soil whereas in late stage

sediment yield for disturbed soil was greater.The time when sediment yield for undi:turbed soil is greater than that for disturbed soil was advanced with increased slope gradient.After a stead state was reached

eroded sediment rate of disturbed soil was greater than that of undisturbed soil and th gap between disturbed and undisturbed soils became larger with increased slope gradient.

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