Effects of Slope Length on Detachment and Transport Processes on a Loessial Hiilslope

WANG Xiao-yong; ZHENG Fen-li

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Effects of Slope Length on Detachment and Transport Processes on a Loessial Hiilslope

- Effects of Slope Length on Detachment and Transport Processes on a Loessial Hiilslope
- Bulletin of Soiland Water Conservation Vol. 27, Issue 3, Pages: 1-4(2008)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院, 陕西杨凌,712100
  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, 陕西杨凌,712100
- 作者简介：
- 基金信息：
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- Published：2008
- 稿件说明：
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WANG Xiao-yong, ZHENG Fen-li. Effects of Slope Length on Detachment and Transport Processes on a Loessial Hiilslope[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 1-4.
DOI：

WANG Xiao-yong, ZHENG Fen-li. Effects of Slope Length on Detachment and Transport Processes on a Loessial Hiilslope[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 1-4. DOI：

摘要

通过不同降雨强度的模拟降雨试验

研究了15°时坡面坡长对黄土坡面侵蚀—搬运过程的影响。结果表明

坡面径流量随坡长的增加而增加

在50和75 mm/h降雨强度下

坡面径流量随坡长增加的幅度基本相同。在100 mm/h降雨强度下

当坡长小于5 m时

坡面径流量随坡长的增加幅度较小

而当坡长大于5 m时

坡面径流量随坡长增加的速率明显增大。在8 m坡长内

坡面侵蚀量随坡长变化呈波状起伏的交替变化;随坡长增加

坡面侵蚀现象呈现以侵蚀—搬运过程为主与以侵蚀—沉积过程为主的交替现象。

Abstract

Effects of slope length on detachment and transport processes on a 15° loessial hillslope were quantitatively studied by using simulated rainfall of different intensities.Results showed that runoff discharge increased with an increase in slope gradient.At the 50 and 75 mm/h rainfall intensities

the increment of runoff discharge with an increase in slope length was approximately the same.At the 100 mm/h rainfall intensity

the increment of runoff discharge decreased for the 5 m slope length

but for the 5 m slope length

runoff discharge remarkably increased with an increase in slope length.Sediment yield was fluctuated obviously for the 8 m slope length.Sediment regime was characterized by an alternation of detachment-transport dominated and detachment-deposition dominated.

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