Relationship between Soil Erosion and Slope Length on Short Slopes

LIU He-ping; WANG Xiu-ying; LIU Bao-yuan

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Relationship between Soil Erosion and Slope Length on Short Slopes

更新时间：2024-11-07

- Relationship between Soil Erosion and Slope Length on Short Slopes
- Vol. 25, Issue 2, (2011)
- 作者机构：
  
  北京师范大学地理学与遥感科学学院,地表过程与资源生态国家重点实验室,北京,100875
- 作者简介：
- 基金信息：
- DOI：
  CLC： S157.1
- Published：2011
- 稿件说明：
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LIU He-ping, WANG Xiu-ying, LIU Bao-yuan. Relationship between Soil Erosion and Slope Length on Short Slopes[J]. 2011, 25(2).
DOI：

LIU He-ping, WANG Xiu-ying, LIU Bao-yuan. Relationship between Soil Erosion and Slope Length on Short Slopes[J]. 2011, 25(2). DOI：

摘要

采用变雨强人工模拟降雨

选择1~10 m共7个坡长

在5°条件下研究了侵蚀产沙量及其过程与坡长的关系

每个坡长进行干运行和湿运行降雨。结果表明:(1)干运行降雨40~80 min

虽然雨强逐渐减小

但4 m及以上坡长小区的径流含沙量保持较高的水平并出现跳跃

而1 m和2.5 m的小区的径流含沙量在整个降雨过程中较平滑;湿运行含沙量总体上小于干运行

且波动幅度较干运行小。(2)2 h降雨平均含沙量随着坡长的增加而增加

可用二次多项式、幂函数及直线来拟合。(3)侵蚀模数与坡长呈幂函数关系

细沟间和细沟侵蚀模数的坡长指数分别为0.101~0.240和0.757~1.609

表明随着坡长增加

细沟间侵蚀增加较小

而细沟侵蚀增加迅速;干运行的坡长指数均大于湿运行的波长指数。

Abstract

Simulated rainfall of varied intensity was applied on plots of 1~10 m in length and 5 degrees in steepness to investigate the effects of slope length on soil erosion processes and soil loss.For each slope length

a wet run was implemented 24 hours after the dry run.The results indicated that sediment concentration on plots equal or longer than 4 m fluctuated during 40~80 min when the rainfall intensity decreased

while it was much smoother on plots of 1 m and 2.5 m.For wet run

sediment concentration was lower...

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