Experimental Research on Variation Processes of Flow Sediment Concentration of Rill on Loess Hill Slope

CHEN Hao; WANG Zhan-li; LIU Jun-e; TAN Zhen-xue

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Experimental Research on Variation Processes of Flow Sediment Concentration of Rill on Loess Hill Slope

更新时间：2024-11-07

- Experimental Research on Variation Processes of Flow Sediment Concentration of Rill on Loess Hill Slope
- Vol. 25, Issue 5, (2011)
- 作者机构：
  
  1. 西北农林科技大学资源与环境学院
  2. 西北农林科技大学水土保持研究所
  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
  4. 钦州市水土保持监测分站
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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CHEN Hao, WANG Zhan-li, LIU Jun-e, et al. Experimental Research on Variation Processes of Flow Sediment Concentration of Rill on Loess Hill Slope[J]. 2011, 25(5).
DOI：

CHEN Hao, WANG Zhan-li, LIU Jun-e, et al. Experimental Research on Variation Processes of Flow Sediment Concentration of Rill on Loess Hill Slope[J]. 2011, 25(5). DOI：

摘要

细沟侵蚀是我国黄土坡面主要侵蚀过程之一

阐明细沟水流含沙量变化过程对于揭示坡面细沟侵蚀产沙过程机理及治理坡面水土流失具有重要意义。采用具有定流量人工放水的组合小区模拟降雨试验

对黄土坡面细沟水流含沙量变化过程进行研究。结果表明:(1)在不同雨强及不同坡度下

细沟水流含沙量随径流过程的变化具有很大的相似性

都随径流历时增长而逐步递增

可用幂函数方程很好地描述;(2)细沟水流平均含沙量随雨强及坡度的增大都相应增大

分别可用线性方程和指数很好地描述;(3)雨强及坡度对细沟水流含沙量的综合作用可用二元幂函数方程很好地描述

其中雨强对坡面细沟水流含沙量的影响大于坡度的影响;(4)水流切应力是细沟水流含沙量变化过程关系最密切的水动力学参数

试验条件下细沟水流含沙量变化过程的发生发展根源于水流剪切力的动力作用过程。

Abstract

Rill erosion is one of the most important soil erosion processes on loess slope.It is of great significance to reveal the mechanism of soil erosion and sediment yield processes and control soil loss on hill slope by studying the variation processes of flow sediment concentration of rill.The simulation experiment on using combinatorial flume under rainfall condition indoors were done to investigate the changing process of flowing sediment concentration of rill on Loess Plateau slope.Results showed that:(1) C...

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