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A Mathematical Model of Migration and Expansion of Meander Loops

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Abstract

This article presents a mathematical model of the plane evolution of alluvial meandering streams, through downstream migration and lateral expansion of meander loops. Under the conditions prevailing in natural streams, the channel centerlines follow sine-generated curves, with an assumed steady-state turbulent and subcritical flow, of large width-to-depth ratio (≥ for example) and small Froude number (Fr). The plane deformation of the channel is caused by the action on the banks of the convective vertically-averaged meandering flow. The growth (migration and expansion) of meander loops is attributed to the regime-trend. The computational results of the model show that the obtained migration and expansion patterns of the meander loops are in good agreement with those of observations and measurements in similar meandering streams.

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Authors and Affiliations

  1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China

    Wen-hong Dai & Hong-wu Tang

Authors
  1. Wen-hong Dai
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  2. Hong-wu Tang
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Correspondence to Hong-wu Tang.

Additional information

Project supported by the National Natural Science Foundation of China (Grants Nos. 50879019, 50879020), the Funding for non-profit public research project of Ministry of Water Resources (Grant No. 200901005), the Central University Science Foundation of China and National Science and Technology Pillar Program of China in the Eleventh Five-Year Plan Period (Grant No. 2008BAB29B08) and the Natural Sciences and Engineering Research Council of Canada (NSERC).

Biography: DAI Wen-hong (1966-), Male, Ph. D., Associate Professor

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Dai, Wh., Tang, Hw. A Mathematical Model of Migration and Expansion of Meander Loops. J Hydrodyn 22, 214–220 (2010). https://doi.org/10.1016/S1001-6058(09)60047-0

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  • DOI: https://doi.org/10.1016/S1001-6058(09)60047-0

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