Numerical Simulation of Hydraulic Characteristics of Overland Flow Under Different Slope and Vegetation Coverage

HU Jing; QIN Guanghua; WANG Ruiying; WANG Shuairen; XIAO Hong

doi:10.13870/j.cnki.stbcxb.2022.03.006

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Numerical Simulation of Hydraulic Characteristics of Overland Flow Under Different Slope and Vegetation Coverage

更新时间：2026-04-09

- Numerical Simulation of Hydraulic Characteristics of Overland Flow Under Different Slope and Vegetation Coverage
- Vol. 36, Issue 3, Pages: 37-43(2022)
- 作者机构：
  
  1. 四川大学水利水电学院,成都,610042
  2. 四川大学水力学与山区河流开发保护国家重点实验室,成都,610042
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.03.006
  CLC： S157.1
- Online First：27 May 2022，
  
  Published：2022
- 稿件说明：
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HU Jing, QIN Guanghua, WANG Ruiying, et al. Numerical Simulation of Hydraulic Characteristics of Overland Flow Under Different Slope and Vegetation Coverage[J]. 2022, 36(3): 37-43.
DOI：

HU Jing, QIN Guanghua, WANG Ruiying, et al. Numerical Simulation of Hydraulic Characteristics of Overland Flow Under Different Slope and Vegetation Coverage[J]. 2022, 36(3): 37-43. DOI： 10.13870/j.cnki.stbcxb.2022.03.006.

摘要

为深入研究坡度与植被对坡面流水力学特性的影响

以Navier—Stokes方程为基础

建立了非淹没刚性植被坡面流模型

并对该模型进行验证。运用该模型

参考西南山区实际情况

设置6个坡度、6个单宽流量和6种覆盖度组合条件下共216种工况

研究了坡面流的水力学特性。结果表明:流速与坡度、流量及植被覆盖度之间呈指数变化

Abstract

In order to study the effect of slope and vegetation on the hydrodynamic characteristics of overland flow

a non-submerged rigid vegetation slope flow model based on the Navier-Stokes equation was established. The effectiveness of the model was tested by some experimental data. The calculated results were basically consistent with the experimental results. Based on the model and the actual situation of Southwest Mountain area

the hydraulic characteristics of overland flow were studied under 216 combined conditions of 6 slopes

6 unit discharges

and 6 coverage degrees. The results showed that the relationship between flow velocity and slope

discharge and vegetation coverage is exponential

and the correlation is 0.987. Under the same flow

with the increase of slope

the growth rate of flow velocity decreased gradually

and the effect of vegetation on the slope flow slowed down gradually. The resistance coefficient was affected by slope

discharge

and vegetation cover

and there was a critical coverage. Below the critical coverage

the resistance coefficient was negatively correlated with discharge

and above the critical coverage

the resistance coefficient was positively correlated with discharge. The critical coverage was affected by the slope

the greater the slope

the greater the critical coverage. The results can provide theoretical reference for the prevention of soil and water loss and the study of the coupling mechanism of flood and sediment.

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references

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