Effect of Slope Gradients on Erosion from a Red Soil Hillslope under Different Rainfall Intensity

ZHANG Hui-ru; ZHENG Fen-li

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Effect of Slope Gradients on Erosion from a Red Soil Hillslope under Different Rainfall Intensity

更新时间：2024-11-07

- Effect of Slope Gradients on Erosion from a Red Soil Hillslope under Different Rainfall Intensity
- Vol. 25, Issue 3, (2011)
- 作者机构：
  
  1. 延安市水土保持监测分站,陕西,延安,716000
  2. 西北农林科技大学资源环境学院,陕西杨凌7121002. 西北农林科技大学资源环境学院,陕西杨凌,712100
  3. 黄土高原土壤侵蚀与旱地农业国家重点实验室,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： S157.1
- Published：2011
- 稿件说明：
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ZHANG Hui-ru, ZHENG Fen-li. Effect of Slope Gradients on Erosion from a Red Soil Hillslope under Different Rainfall Intensity[J]. 2011, 25(3).
DOI：

ZHANG Hui-ru, ZHENG Fen-li. Effect of Slope Gradients on Erosion from a Red Soil Hillslope under Different Rainfall Intensity[J]. 2011, 25(3). DOI：

摘要

通过室内模拟降雨试验

研究了不同降雨条件下地面坡度对红壤坡面产流过程和侵蚀过程的影响

结果表明

红壤坡面起始产流时间随坡度的增加有所提前

但不明显

坡面起始产流时间的早晚主要受降雨强度控制;坡面径流量随雨强的增大而增大

随坡度的变化比较复杂

在雨强为50mm/h时

径流量随坡度的增加而减小

在雨强为75mm/h时

径流量随坡度的增加先增大后减小;不同降雨强度下各坡度的侵蚀产沙率都是在降雨初期急剧上升

随后以指数下降

形成一个向左倾斜的曲线。坡度对坡面侵蚀产沙的影响随雨强的增大而增强;红壤坡面土壤侵蚀量随雨强的增大明显增大

随坡度的增加

在50mm/h小雨强时呈现先增加后减小的变化趋势

在坡度20°附近存在临界坡度;在75mm/h雨强下

侵蚀量随坡度增大而增大。

Abstract

The simulated rainfall experiment was used to quantify the effects of slope gradients on runoff and soil erosion processes on red earth hillslopes under different rainfall intensity conditions.The results showed that the initial slope red soil runoff rates increased the time in advance with the slope

but weren't obvious

start time of slope runoff was mainly affected by rainfall intensity control sooner or later;slope runoff increased with rainfall intensity increases

with slope gradient was more complex

in ...

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