Experimental Study on the Response of Slope Runoff and Erosion Process to Vegetative Filter Strip

CHEN Qian1; FU Yu2; SHE Dongli1; FENG Xiaohong3; LUO Hewen2

doi:10.13870/j.cnki.stbcxb.2017.06.018

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Experimental Study on the Response of Slope Runoff and Erosion Process to Vegetative Filter Strip

更新时间：2025-03-12

- Experimental Study on the Response of Slope Runoff and Erosion Process to Vegetative Filter Strip
- Vol. 31, Issue 6, Pages: 104-109(2017)
- 作者机构：
  
  1. 河海大学南方地区高效灌排与农业水土环境教育部重点实验室,南京,210098
  2. 溧阳市国土资源局，江苏溧阳,213300
  3. 扬州市勘测设计研究院有限公司,江苏,扬州,225007
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.06.018
  CLC： S157.2
- Published：2017
- 稿件说明：
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CHEN Qian1, FU Yu2, SHE Dongli1, et al. Experimental Study on the Response of Slope Runoff and Erosion Process to Vegetative Filter Strip[J]. 2017, 31(6): 104-109.
DOI：

CHEN Qian1, FU Yu2, SHE Dongli1, et al. Experimental Study on the Response of Slope Runoff and Erosion Process to Vegetative Filter Strip[J]. 2017, 31(6): 104-109. DOI： 10.13870/j.cnki.stbcxb.2017.06.018.

摘要

为探讨植被过滤带在坡面产流产沙过程中对水沙的拦截效果及其水动力学机理，通过在室内土槽上设置模拟植被过滤带并进行浑水冲刷试验，得到有无模拟植被过滤带情况下的产流产沙情况及相关水动力学参数，定量分析了植被过滤带对径流、泥沙的拦截效果并探讨了坡面产沙率与水动力学参数之间的关系。结果表明，植被过滤带在放水冲刷试验中能有效拦截径流和泥沙，且在较小流量下，径流和泥沙的拦截效果更好，在200 L/h流量下，拦截率分别可达33.2%和96.9%；在冲刷过程中，有无模拟植被过滤带产沙率与水流剪切力、水流功率都具有显著的相关关系，分别呈指数函数（R2=0.67，R2=0.83）和幂函数（R2=0.70，R2=0.87）增大关系；采用水流剪切力和水流功率的非线性回归方程Rs=1.184×10-6τ-4.114ω3.839（R2=0.73）预测产沙率效果较好。

Abstract

In order to study the interception effect and hydrodynamic mechanism of vegetation filter strips (VFS) during runoff and sediment yield progress on slope surface

a simulated vegetation filter belt was set up on the inner soil trough

and the muddy water erosion tests were carried out. After getting the runoff and sediment yield and related hydrodynamic parameters under the situation of with or without vegetative filter strip through the tests

the vegetation filter intercepting effect of runoff and sediment was quantitatively analyzed and the relationship between sediment production rate and hydrodynamic parameters was explored. The results showed that VFS could effectively intercept runoff and sediments during the tests

and the interception rate was better under smaller flow. When the flow was 200 L/h

the interception rate was 33.2% for runoff and 96.9% for sediments. During the scouring process

the sediment yield rate had significant correlation with flow shear stress and flow power under the situation of with or without VFS

which were positive exponential function relationships (R2=0.67

R2=0.83) with flow shear stress and power function relationships (R2=0.70

R2=0.87) with flow power

respectively. Using a nonlinear regression equation Rs=1.184×10-6τ-4.114ω3.839（R2=0.73）with flow force and flow power to predict the sediment yield rate could get better effect.

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