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Modelling Initiation Stage of Backward Erosion Piping through Analytical Models

Author

Listed:
  • Guanyong Luo

    (The State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

  • John D. Rice

    (Department of Civil and Environmental Engineering, Utah State University, Logan, UT 84322, USA)

  • Sige Peng

    (The State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

  • Hong Cao

    (The State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

  • Hong Pan

    (The State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

  • Guoyuan Xu

    (The State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

Abstract

Backward erosion piping, which is one of the leading causes of levee and dam failures, is more likely to occur when a flow is concentrated on a defect with an overlying low-permeability layer and a shallow erosion channel forming and progressing towards a seepage source. Two analytical models are presented to allow assessment of the seepage regime on the initiation stage of BEP. The variations between the two models are analysed, indicating that the effects of soil loosening have a major role in the assessment of BEP mechanisms. This paper also describes the reliability of using Xiao’s model in 3D analysis, which includes results and parametric analysis. Although the head in front of the tip of the erosion channel can be predicted by this accepted calculation model, which is essential for laboratory work on this topic, the model also has range and boundary limitations that need to be addressed for general prediction when BEP progresses with channel development.

Suggested Citation

  • Guanyong Luo & John D. Rice & Sige Peng & Hong Cao & Hong Pan & Guoyuan Xu, 2022. "Modelling Initiation Stage of Backward Erosion Piping through Analytical Models," Land, MDPI, vol. 11(11), pages 1-18, November.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:11:p:1970-:d:962467
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