Transverse distribution of streamwise velocity in open-channel flow with artificial emergent vegetation

2018 ◽  
Vol 110 ◽  
pp. 78-86 ◽  
Author(s):  
Jiao Zhang ◽  
Ya Zhong ◽  
Wenxin Huai
Keyword(s):  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Streamwise Velocity ◽  
Emergent Vegetation ◽  
Transverse Distribution

Transverse Distribution of the Streamwise Velocity for the Open-channel Flow With Floating Vegetated Islands

2021 ◽  
Author(s):  
Xuecheng Fu ◽  
Feifei Wang ◽  
Mengyang Liu ◽  
Wenxin Huai
Keyword(s):  
Channel Flow ◽  
Open Channel ◽  
Flow Characteristics ◽  
Open Channel Flow ◽  
Streamwise Velocity ◽  
Transport Efficiency ◽  
Transverse Distribution ◽  
Floating Vegetation ◽  
Shear Turbulence ◽  
Field Disturbance

Abstract Floating vegetation islands (FVIs) have been widely utilized in various river ecological restoration projects due to their ability to purify pollutants. FVIs float at the surface of shallow pools with their roots unanchored in the sediment. Biofilm formed by roots under islands filters nutrients and particles in the water flowing through it. Flow field disturbance will occur and transverse distribution of flow velocity will change due to the existence of FVIs. Transport efficiency of suspended solids, nutrients, and pollutants will also be altered. A modified analytical model that considers effects of boundary friction, drag force of vegetation, transverse shear turbulence, and secondary flow is established to predict transverse variation of depth-averaged streamwise velocity for the open-channel flow with FVIs using Shiono and Knight method. The simulation results with suitable boundary conditions successfully predicted lateral profile of the depth-averaged streamwise velocity compared with the experimental results of symmetrical and unsymmetrical arrangements of FVIs. Hence, the presented model can provide guidance for investigating flow characteristics of rivers with FVIs.

Turbulence structure in open channel flow with partially covered artificial emergent vegetation

2019 ◽  
Vol 573 ◽  
pp. 180-193 ◽  
Author(s):  
Wen-Xin Huai ◽  
Jiao Zhang ◽  
Wei-Jie Wang ◽  
Gabriel G. Katul
Keyword(s):  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Emergent Vegetation ◽  
Turbulence Structure

Floating seed dispersal in open channel flow with emergent vegetation

Ecohydrology ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. e2038 ◽  
Author(s):  
Xiaoguang Liu ◽  
Yuhong Zeng ◽  
Wenxin Huai
Keyword(s):  
Seed Dispersal ◽  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Emergent Vegetation

Modelling the effects of emergent vegetation on an open-channel flow using a lattice model

2007 ◽  
Vol 55 (7) ◽  
pp. 655-672 ◽  
Author(s):  
Francisco J. Jiménez-Hornero ◽  
Juan V. Giráldez ◽  
Ana M. Laguna ◽  
Sean J. Bennett ◽  
Carlos V. Alonso
Keyword(s):  
Channel Flow ◽  
Lattice Model ◽  
Open Channel ◽  
Open Channel Flow ◽  
Emergent Vegetation
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