Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau

Gao Junxia; Dang Hongbin; Cheng Jimin

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Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau

- Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 26, Issue 2, Pages: 49-42(2007)
- 作者机构：
  
  1. 郑州航空工业管理学院环境工程实验室,河南,郑州,450015
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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Gao Junxia, Dang Hongbin, Cheng Jimin. Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 49-42.
DOI：

Gao Junxia, Dang Hongbin, Cheng Jimin. Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 49-42. DOI：

摘要

在野外利用人工模拟降雨试验

分析了20

60m坡长下的输沙率、含沙量及累积产沙量-径流量的变化特征。结果显示

当雨强小于2.0mm/min时

最大输沙率出现在40m坡长;而当雨强大于2.0mm/min时

最大输沙率出现在60m坡长。在试验雨强范围内

最大含沙量总是出现在20m坡长。累积产沙量-径流量随时间变化趋于平稳。试验结果表明

为遏制黄土高原坡耕地水土流失

实践中应采取垄作等措施增加坡面糙度和改变坡面形态

防止在20m坡长形成高含沙水流和后续坡长的输沙率。

Abstract

The characteristics of sediment transport rate

sediment concentration and accumulative sediment-runoff in slope lengths of 20

60m were analyzed based on field simulated rainfall experiments.Results showed that maximum sediment transport rate occurred in 40m slope length at rainfall intensity less than 2mm/ min

while it occurred in 60m slope length at rainfall intensity greater than 2mm/min.Max imum sediment concentration was always observed in 20m slope length in all the experiments.Accumulative sediment-runoff was prone to be steady with time.The study implies that the measures such as farming along contour

which increases the roughness value of slope and changes slope form

should be taken to reduce high sediment concentration and sediment transportrate

and thus control soil and water loss on loess slope.

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