含植被坡面水动力学特性的实验研究

中国农村水利水电 ›› 2021 ›› (2) : 18-23.

水环境与水生态

含植被坡面水动力学特性的实验研究

谢艳1,2，朱崇林1，雷孝章1,2

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Experimental Research on Hydrodynamic Characteristics on the Slope Covered by Vegetation

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摘要

基于水槽试验,系统的研究了在5种流量、3种植被组合和3种覆盖密度情况下的坡面流的水力参数、水力因子间的关系和阻力规律。结果表明，坡面流一般为湍流，植被的存在增强了坡面流的湍流强度。平均流速与单宽流量幂函数相关，且拟合结果良好。柔性植被对流速的减缓作用大于刚性植被。柔性植被坡面和刚性植被坡面的阻力系数均随雷诺数的增加呈幂函数递减。

Abstract

Based on flume experiments, the hydraulic parameters, the relationship among hydraulic factors and the law of resistance under 5 discharges, 3 vegetation combinations and 3 coverage densities are systematically studied. The results show that the flow pattern of the thin and sheet layer flow on the slope is generally turbulent, and the presence of vegetation enhances the turbulent intensity of the flow. The power function can be used to simulate the relationship between average velocity and discharge per width, and the fitting results are good. The mitigation effect of flexible vegetation on velocity is greater than that of rigid vegetation. The resistance of both the flexible vegetation slope and the rigid vegetation slope decreases as a power function with the increase in Reynolds number.

关键词

坡面流 / 柔性植被 / 刚性植被 / 水流流态 / 阻力规律

Key words

overland flow / flexible vegetation / rigid vegetation / flow patterns / law of resistance

基金

国家自然科学基金

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谢艳朱崇林雷孝章. 含植被坡面水动力学特性的实验研究[J].中国农村水利水电, 2021(2): 18-23

. Experimental Research on Hydrodynamic Characteristics on the Slope Covered by Vegetation[J].China Rural Water and Hydropower, 2021(2): 18-23

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收稿日期	修订日期	出版日期
2020-04-10	2020-06-09	2021-02-15
发布日期
2021-03-30

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