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The Deformation and Shear Vortex Width of Flexible Vegetation Roots in an Artificial Floating Bed Channel

Author

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  • Yiting Qi

    (School of Water Conservancy and Environment Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310000, China)

  • Yu Bai

    (School of Water Conservancy and Environment Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310000, China)

  • Xin Cao

    (School of Water Conservancy and Environment Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310000, China)

  • Erpeng Li

    (Yunnan Electric Test & Research Institute Group Co. Ltd., Kunming 650200, China)

Abstract

As an ecological measure to deal with river water quality problems, artificial floating islands have been widely used all over the world, but the research on root deformation and shear vortex width under the action of artificial floating islands is rare. In this paper, the relationship between the deformation of vegetation roots and parameters of vegetation roots under different hydrodynamic conditions is experimentally studied. The results show that the Cauchy number ( C a ) value gradually increases with the increase of velocity, and that the smaller the diameter is, the greater the C a value is. The value of the buoyancy number ( B ) will increase with the increase of root length and will decrease with the increase of root diameter. The corresponding deformation formula of flexible root systems under hydrodynamic conditions is obtained, and has high simulation accuracy. Based on theoretical analysis and machine learning, a formula for the shear vortex width of flexible vegetation is established, δ = 0.361 + 0.0738 l e l α C d f . The research results can provide a theoretical basis for hydrodynamic and solute transport in artificial floating island channels.

Suggested Citation

  • Yiting Qi & Yu Bai & Xin Cao & Erpeng Li, 2022. "The Deformation and Shear Vortex Width of Flexible Vegetation Roots in an Artificial Floating Bed Channel," Sustainability, MDPI, vol. 14(18), pages 1-14, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:18:p:11661-:d:917077
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    References listed on IDEAS

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    1. Yeh, Naichia & Yeh, Pulin & Chang, Yuan-Hsiou, 2015. "Artificial floating islands for environmental improvement," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 616-622.
    2. Silas Alben & Michael Shelley & Jun Zhang, 2002. "Drag reduction through self-similar bending of a flexible body," Nature, Nature, vol. 420(6915), pages 479-481, December.
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    Cited by:

    1. Tomasz Tymiński & Tomasz Kałuża & Mateusz Hämmerling, 2022. "Verification of Methods for Determining Flow Resistance Coefficients for Floodplains with Flexible Vegetation," Sustainability, MDPI, vol. 14(23), pages 1-13, December.

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