Experiment Modeling of Soil Erosion Processes on Loess Roads Based on Simulated Experiment

Tian Fengxia; Wang Zhanli; Zheng Shiqing; Ma Chunyan

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Experiment Modeling of Soil Erosion Processes on Loess Roads Based on Simulated Experiment

- Experiment Modeling of Soil Erosion Processes on Loess Roads Based on Simulated Experiment
- Bulletin of Soiland Water Conservation Vol. 26, Issue 2, Pages: 1-4(2007)
- 作者机构：
  
  1. 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
  2. 中国科学院研究生院,北京,100039
  3. 西北农林科技大学, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
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- Published：2007
- 稿件说明：
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Tian Fengxia, Wang Zhanli, Zheng Shiqing, et al. Experiment Modeling of Soil Erosion Processes on Loess Roads Based on Simulated Experiment[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 1-4.
DOI：

Tian Fengxia, Wang Zhanli, Zheng Shiqing, et al. Experiment Modeling of Soil Erosion Processes on Loess Roads Based on Simulated Experiment[J]. Bulletin of Soiland Water Conservation, 2007, 26(2): 1-4. DOI：

摘要

黄土地区土质道路侵蚀强烈

严重影响当地的生产与交通事业。开展黄土道路侵蚀研究

对于黄土地区水土保持与生态经济建设具有重要意义。采用模拟降雨试验方法研究了黄土道路侵蚀过程

取得了如下结果。(1)道路径流侵蚀发生时间随雨强及坡度的变化皆可用幂函数方程描述;(2)道路径流侵蚀开始时含沙量很高

但很快下降并随降雨历时的延长而逐渐趋于相对稳定;(3)道路侵蚀率变化过程可分为3个阶段:径流侵蚀开始至20min及40min至侵蚀过程结束

侵蚀率随降雨过程的变化较大

20～40min之间基本稳定;(4)道路侵蚀模数随雨强及坡度的变化均可用幂函数方程描述

雨强及坡度对道路侵蚀的综合影响可用二元线性方程描述。

Abstract

Road erosion in the loess region is a severe problem which influences traffic

transportation and agricultural activities etc.Research on road erosion is very important to soil and w ater conservation

ecology construction and economy development in the region.Based on simulated rainfall experiments

erosion processes on loess roads are studied

and following results are obtained.(1)The variations of starting time of soil erosion by runoff with rainfall intensity and slope gradient can be respectively described with exponential equations.(2)The sediment concent ration is very high in the initial stage of soil erosion processes by runoffon road.However

the concent ration decreases very quickly

and then gradually becomes relative steady in continued rainfall processes.(3)The variation of road erosion rate can be divided into three stages during which the variation of erosion rate with rainfall process is great from the commence of soil erosion by runoff to 20min

and from 40min to the end of runoff erosion processes

and is relatively steady from 20min to 40min.(4)The variations of road erosion modulus with rainfall intensity and slope gradient can be described with exponential equations

respectively

and the integrated effects of rainfall intensity and slope gradient on road erosion can be described with a binary linear equation.

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