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Influence of Vegetation Coverage on Hydraulic Characteristics of Overland Flow
Article

Hydraulic Characteristics of Emerged Rigid and Submerged Flexible Vegetations in the Riparian Zone

1
Ocean College, Zhejiang University, Hangzhou 310058, China
2
Department of Materials, Mechanics, Management and Design (3MD), Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
3
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
*
Author to whom correspondence should be addressed.
Academic Editor: Bommanna Krishnappan
Water 2021, 13(8), 1057; https://doi.org/10.3390/w13081057
Received: 8 March 2021 / Revised: 7 April 2021 / Accepted: 8 April 2021 / Published: 12 April 2021
(This article belongs to the Section Hydraulics and Hydrodynamics)
Flow resistance, velocity distribution, and turbulence intensity are significantly influenced by aquatic vegetations (AV) in riparian zones. Understanding the hydraulics of flow with planted floodplains is of great significance for determining the velocity distribution profile and supporting the fluvial processes management. However, the traditional flume experiment method is inefficient. Therefore, the multigroup simultaneous flume test method was carried out to describe the flow patterns affected by emerged rigid (reed and wooden stick) and submerged flexible vegetations (grass and chlorella). The Acoustic Doppler Velocimeter (ADV) was utilized to measure the velocity at one point for different experimental conditions. The results showed that hydraulic features were influenced by different types of vegetation. Furthermore, the relative depth (z/h) was a determining factor of those variations. In addition, the time-averaged velocity distributions of planted floodplains are not logarithmic. Instead, they represented “s-shape” profiles. In detail, for the vegetated floodplains, reed and wood followed an s-shape profile, but for grass and chlorella, they followed reverse s-shape profile. For all cases, turbulence is not isotropic and the change law of turbulence intensity is different in different sections. The flow resistance, turbulence intensities, and Reynold stresses influenced by different types of vegetation were also analyzed. View Full-Text
Keywords: flume experiment; reynold stress; vegetated flow; flow resistance flume experiment; reynold stress; vegetated flow; flow resistance
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MDPI and ACS Style

Meng, X.; Zhou, Y.; Sun, Z.; Ding, K.; Chong, L. Hydraulic Characteristics of Emerged Rigid and Submerged Flexible Vegetations in the Riparian Zone. Water 2021, 13, 1057. https://doi.org/10.3390/w13081057

AMA Style

Meng X, Zhou Y, Sun Z, Ding K, Chong L. Hydraulic Characteristics of Emerged Rigid and Submerged Flexible Vegetations in the Riparian Zone. Water. 2021; 13(8):1057. https://doi.org/10.3390/w13081057

Chicago/Turabian Style

Meng, Xin; Zhou, Yubao; Sun, Zhilin; Ding, Kaixuan; Chong, Lin. 2021. "Hydraulic Characteristics of Emerged Rigid and Submerged Flexible Vegetations in the Riparian Zone" Water 13, no. 8: 1057. https://doi.org/10.3390/w13081057

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