Comparative Analysis of Hydrodynamic Parameters for Unpaved Road and Original Ground

ZHAN Song; WANG Wen-long; HUANG Peng-fei; LI Hong-wei; LI Jian-ming; WANG Zhen; LUO Ting

doi:10.13961/j.cnki.stbctb.2014.02.001

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Comparative Analysis of Hydrodynamic Parameters for Unpaved Road and Original Ground

- Comparative Analysis of Hydrodynamic Parameters for Unpaved Road and Original Ground
- Bulletin of Soiland Water Conservation Vol. 33, Issue 2, Pages: 1-6(2014)
- 作者机构：
  
  1. 西北农林科技大学资源与环境学院, 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试验室, 陕西杨凌,712100
  3. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  4. 江西省水土保持科学研究院土壤侵蚀与防治重点试验室,江西,南昌,330029
  5. 浙江省水利水电勘测设计院,浙江,杭州,310014
  6. 中国水电顾问集团华东勘测设计研究院,浙江,杭州,310014
  7. 杭州大地科技有限公司,浙江,杭州,310000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.02.001
  CLC：
- Published：2014
- 稿件说明：
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ZHAN Song, WANG Wen-long, HUANG Peng-fei, et al. Comparative Analysis of Hydrodynamic Parameters for Unpaved Road and Original Ground[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 1-6.
DOI：

ZHAN Song, WANG Wen-long, HUANG Peng-fei, et al. Comparative Analysis of Hydrodynamic Parameters for Unpaved Road and Original Ground[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 1-6. DOI： 10.13961/j.cnki.stbctb.2014.02.001.

摘要

非硬化路面是神府煤田重要的侵蚀单元

其侵蚀过程和方式与原生地面存在一定差别。通过野外人工模拟降雨试验

对比分析了非硬化路面和原生地面水沙响应的过程和机制。结果表明:(1)非硬化路面径流主要为过渡流

原生地面主要为层流

且均为缓流; (2)非硬化路面水流流速、剪切力、佛汝德数、雷诺数、功率大于原生地面

曼宁系数、达西系数小于原生地面; (3)非硬化路面水力参数随坡度、雨强变化趋势与原生地面不完全一致; (4)非硬化路面产沙量随径流量增大

原生地面产沙量为非硬化路面的0.8%~14%; (5)非硬化路面侵蚀模数对水动力参数响应紧密程度表现为:径流总动能> 平均水流功率> 平均水流剪切力。

Abstract

Erosion processes and modes may be changed on unpaved road formed by rolling original ground. The objective of this study was to reveal the changing mechanisms of water and sediment yield by a series of outdoor artificial rainfall simulation experiments in Shenfu coalfield. Results show that: (1) Flow regime is mainly the transitional flow on unpaved road and the laminar flow on original ground

and both of them are the subcritical flow. (2) Reynolds number

shear force

Froude number

flow velocity and stream power on unpaved road are higher than those on original ground

while the Darcy-Weisbach friction coefficient and the Manning roughness coefficient on unpaved road are lower than those on original ground. (3) Hydrodynamic parameters on unpaved roads are not absolutely consistent with those on original ground. (4) Sediment yield on original ground is lower than that on unpaved road and increased as runoff yield increases. (5) Correlation coefficients for the responsive relationships between sheet erosion rate and hydrodynamic parameters on unpaved road are in the following order: runoff kinetic energy> mean stream power> mean flow shear stress.

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references

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