Experimental Study of Sheet Erosion Processes on Loess Hillslope

LIU Jun-e; WANG Zhan-li; GAO Su-juan

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Experimental Study of Sheet Erosion Processes on Loess Hillslope

更新时间：2024-11-07

- Experimental Study of Sheet Erosion Processes on Loess Hillslope
- Vol. 25, Issue 3, (2011)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院,陕西杨凌,7121002. 西北农林科技大学水土保持研究所,陕西杨凌,712100
  2. 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
- 作者简介：
- 基金信息：
- DOI：
  CLC： S157.1
- Published：2011
- 稿件说明：
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LIU Jun-e, WANG Zhan-li, GAO Su-juan. Experimental Study of Sheet Erosion Processes on Loess Hillslope[J]. 2011, 25(3).
DOI：

LIU Jun-e, WANG Zhan-li, GAO Su-juan. Experimental Study of Sheet Erosion Processes on Loess Hillslope[J]. 2011, 25(3). DOI：

摘要

片蚀过程是坡面径流侵蚀过程的第一阶段和侵蚀方式演变的初始形态

阐明坡面片蚀过程可为坡面侵蚀过程模型建立和坡面水土流失治理提供重要科学依据。采用人工模拟降雨试验方法对黄土坡面片蚀过程进行了研究

结果表明:不同雨强及不同坡度下

坡面片蚀率皆随降雨历时的增长呈先急剧增大后趋于稳定的变化趋势

变化的转折点为产流后的5min左右;坡面片蚀模数随雨强和坡度的增大均呈显著的增加

可分别用指数方程和对数方程描述;雨强和坡度对片蚀模数的综合影响可以用二元幂函数方程描述

其中

坡度的影响大于雨强;水流功率是试验条件下与坡面片蚀动力学过程关系最密切的水动力学参数

坡面片蚀动力学过程的发生发展根源于坡面薄层径流的水流功率的动力作用。采取有关水保措施减低地面坡度

增加地面入渗

降低坡面径流流速可以有效地减少坡面片蚀。

Abstract

As sheet erosion processes being the first stage and initial form of the evolvement of the erosion on slope

the study of sheet erosion processes plays a great role in modeling the erosion processes and providing a basis for erosion control.An experimental research on sheet erosion processes on loess slope was carried out

and the results showed that erosion rates increased sharply then went to smooth with time both under different rainfall intensities and under different slope gradients

with the turning poin...

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