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An Analytical Model for the Distributions of Velocity and Discharge in Compound Channels with Submerged Vegetation

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  • Beihan Jiang
  • Kejun Yang
  • Shuyou Cao

Abstract

Based on the momentum transfer theory, an analytical model is proposed for the velocity and discharge distributions in compound channels with submerged vegetation on the floodplain. The partially vegetated channel was divided into three sub-regions, i.e. the main channel region, the floodplain region with submerged vegetation and the floodplain region without vegetation. For each region, the force balance relationship was established, and the momentum transfer between different regions was presented. Verification by the experimental data and comparison with the traditional method shows that the proposed method is capable of predicting for the velocity and discharge distributions in compound channels with submerged vegetation and is superior to the conventional method. The results also show that when the momentum transfer between different regions is ignored, the computed discharge will be much lager than the measured data, and the error increases with the discharge, especially in the floodplain region.

Suggested Citation

  • Beihan Jiang & Kejun Yang & Shuyou Cao, 2015. "An Analytical Model for the Distributions of Velocity and Discharge in Compound Channels with Submerged Vegetation," PLOS ONE, Public Library of Science, vol. 10(7), pages 1-17, July.
    • Handle: RePEc:plo:pone00:0130841
    DOI: 10.1371/journal.pone.0130841
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    Cited by:

    1. Zhenhua Wang & Jingying Lu & Youquan Yuan & Yinghan Huang & Jingjie Feng & Ran Li, 2019. "Experimental Study on the Effects of Vegetation on the Dissipation of Supersaturated Total Dissolved Gas in Flowing Water," IJERPH, MDPI, vol. 16(13), pages 1-14, June.
    2. Alireza Keshavarzi & Hossein Hamidifar, 2018. "Kinetic energy and momentum correction coefficients in compound open channels," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 92(3), pages 1859-1869, July.

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