Spatial Characteristics of Uravitational Erosion in Slope-gully System on Loess Plateau as Controlled by Check Dam

ZOU Bing-hua; YUAN Jie; LI Zhan-bin; LI Peng

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Spatial Characteristics of Uravitational Erosion in Slope-gully System on Loess Plateau as Controlled by Check Dam

- Spatial Characteristics of Uravitational Erosion in Slope-gully System on Loess Plateau as Controlled by Check Dam
- Bulletin of Soiland Water Conservation Vol. 32, Issue 5, Pages: 55-59(2013)
- 作者机构：
  
  1. 中国水电顾问集团成都勘测设计研究院,四川,成都,610072
  2. 西安理工大学西北水资源与环境生态教育部重点实验室,陕西,西安,710048
  3. 西安理工大学水利水电学院,陕西,西安,710048
- 作者简介：
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- Published：2013
- 稿件说明：
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ZOU Bing-hua, YUAN Jie, LI Zhan-bin, et al. Spatial Characteristics of Uravitational Erosion in Slope-gully System on Loess Plateau as Controlled by Check Dam[J]. Bulletin of Soiland Water Conservation, 2013, 32(5): 55-59.
DOI：

ZOU Bing-hua, YUAN Jie, LI Zhan-bin, et al. Spatial Characteristics of Uravitational Erosion in Slope-gully System on Loess Plateau as Controlled by Check Dam[J]. Bulletin of Soiland Water Conservation, 2013, 32(5): 55-59. DOI：

摘要

基于有限元技术，建立了关地沟4号坝上游典型坡沟系统的概化模型，结果发现随淤地坝坝地的淤高，坡沟系统的稳定性和滑塌量分别增强和减少，其随坝地淤高的变化分别满足二项式和直线规律；通过软件模拟计算，结果发现在坡沟系统重力侵蚀中，随着淤地坝的淤高，峁坡和沟坡滑塌物的体积和重量之比基本为1:50；峁坡滑塌物的体积和重量占总滑塌物的体积和重量的2%，而沟坡滑塌物的体积和重量占总滑塌物的体积和重量的98%，沟坡重力侵蚀是沟道泥沙的主要来源。该研究结果可为小流域沟道重力侵蚀的预报和侵蚀量的评估提供重要参数和科学依据。

Abstract

By using finite element method and establishing a generalized model for the classical slope-gully system of Uuandigou watershed

it is found that with gradual rise of dam land

the stability of the slope-gully system is enhanced and the slumping amount is reduced

which separately satisfies binomial and linear rules.Through calculating and simulating by software

the erosion amounts and percentages of gravitational erosion on mound and gully slopes are obtained.For gravitational erosion of the slope-gully system，with dam land rising gradually

ratio of the volume to weight of slumping soil on mound slope or gully slope is about 1:50.In addition

the volume and weight of slumping soil on mound slope are about 2 percent of the volume and weight of the total slumping soil

respectively

while on gully slope

about 98 percent.Thus

the gravitational erosion on gully slope is the main source of channel sediment. Result from the study can provide important parameters and a scientific foundation for predicting and quantitatively evaluating gravitational erolion in small watershed.

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