Experimental Research on Hydrodynamic Characteristics on the Slope Covered by Vegetation

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China Rural Water and Hydropower ›› 2021 ›› (2) : 18-23.

Experimental Research on Hydrodynamic Characteristics on the Slope Covered by Vegetation

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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.

Key words

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

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. Experimental Research on Hydrodynamic Characteristics on the Slope Covered by Vegetation. China Rural Water and Hydropower. 2021, 0(2): 18-23

References

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Funding

National Natural Science Foundation of China

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