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Simulation of Dam-Breach Outflow Hydrographs Using Water Level Variations

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  • Khil-Ha Lee

    (Daegu University)

Abstract

Most parametric models of earthen dam failure require a breach progression curve to establish an outflow hydrograph, but well-documented breach progression data obtained during dam failure are rarely available. As an alternative, the potential for developing outflow hydrographs from observed variations in reservoir water level is explored. The parameter retrieval process is based on minimizing the difference between the model solution and the water level observations. The retrieved optimal parameters are used to build an outflow hydrograph, which is then linked with a routing model to identify the flood-prone areas downstream. The suggested approach is tested in a case study of a small reservoir and is validated with the inundation area recorded in an on-site investigation. The disparity between the simulated and recorded inundation areas is approximately 7~8%, and the difference in water depth is small at 0.03~0.09 m. Overall, the suggested approach provides reasonable accuracy for the test site.

Suggested Citation

  • Khil-Ha Lee, 2019. "Simulation of Dam-Breach Outflow Hydrographs Using Water Level Variations," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(11), pages 3781-3797, September.
    • Handle: RePEc:spr:waterr:v:33:y:2019:i:11:d:10.1007_s11269-019-02341-5
    DOI: 10.1007/s11269-019-02341-5
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    References listed on IDEAS

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    1. M. Peng & L. Zhang, 2012. "Analysis of human risks due to dam break floods—part 2: application to Tangjiashan landslide dam failure," 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. 64(2), pages 1899-1923, November.
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    Cited by:

    1. Alireza Khoshkonesh & Blaise Nsom & Farhad Bahmanpouri & Fariba Ahmadi Dehrashid & Atefeh Adeli, 2021. "Numerical Study of the Dynamics and Structure of a Partial Dam-Break Flow Using the VOF Method," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(5), pages 1513-1528, March.

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