Print Email Facebook Twitter Hydraulic characteristics of emerged rigid and submerged flexible vegetations in the riparian zone Title Hydraulic characteristics of emerged rigid and submerged flexible vegetations in the riparian zone Author Meng, Xin (Zhejiang University) Zhou, Y. (TU Delft Materials- Mechanics- Management & Design) Sun, Zhilin (Zhejiang University) Ding, Kaixuan (Zhejiang University) Chong, Lin (Zhejiang University) Department Materials- Mechanics- Management & Design Date 2021 Abstract 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. Subject Flow resistanceFlume experimentReynold stressVegetated flow To reference this document use: http://resolver.tudelft.nl/uuid:dce6d6a2-2568-4b0c-a94e-440bc0159d16 DOI https://doi.org/10.3390/w13081057 ISSN 2073-4441 Source Water, 13 (8) Part of collection Institutional Repository Document type journal article Rights © 2021 Xin Meng, Y. Zhou, Zhilin Sun, Kaixuan Ding, Lin Chong Files PDF water_13_01057_v2.pdf 19.85 MB Close viewer /islandora/object/uuid:dce6d6a2-2568-4b0c-a94e-440bc0159d16/datastream/OBJ/view