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Study on Flow Velocity Distribution in Open Channel With Flexible Vegetation
Shiyu Wang1, Yi Zhou1, Tongshu Li1
1College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China.
Frontiers in Plant Science
|December 9, 2021
Summary
This study models river flow velocity in vegetated channels using vegetation riverbed and bursting phenomenon theories. The combined model accurately predicts flow distribution, aiding ecological river management and measurement.
Area of Science:
- Environmental Science
- Fluid Dynamics
- River Engineering
Background:
- Ecological river management is crucial for sustainable development.
- Accurate flow measurement in ecological rivers is essential.
- Understanding flow velocity distribution in vegetated channels is key.
Purpose of the Study:
- To develop a flow velocity distribution model for channels with flexible vegetation.
- To reveal the microscopic mechanisms of flow velocity distribution.
- To provide solutions for flow measurement in ecological channels.
Main Methods:
- Constructed a model using vegetation riverbed theory and the bursting phenomenon.
- Evaluated flexible vegetation effects using the mixed length formula.
- Established a two-dimensional velocity model incorporating average turbulence structure and channel sidewall influences.
Main Results:
- The combined model accurately describes the overall channel velocity distribution.
- Explained the downward shift of maximum flow velocity on channel sidewalls.
- Verified model predictions with laboratory experimental data.
Conclusions:
- The integrated model effectively captures flow dynamics in vegetated river channels.
- The study offers insights into flow velocity zoning in open channels.
- Findings support improved flow measurement techniques for ecological river management.
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