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Driftwood deposition from debris flows at slit-check dams and fans

Author

Listed:
  • Badri Shrestha
  • Hajime Nakagawa
  • Kenji Kawaike
  • Yasuyuki Baba
  • Hao Zhang

Abstract

Experience shows that debris flows containing large woody debris (driftwood) can be more damaging than debris flows without driftwood. In this study, the deposition process of debris flows carrying driftwood was investigated using numerical simulations and flume experiments. Debris-flow trapping due to driftwood jamming in a slit-check dam was also investigated. A numerical model was developed with an interacting combination of Eulerian expression of the debris flow and Lagrangian expression of the driftwood, in which the fluctuating coordinates and rotation of the driftwood were treated stochastically. The calculated shapes and thicknesses of a debris-flow fan and the positions and orientations of the deposited driftwood on a debris-flow fan were consistent with experimental flume results. The jamming of driftwood in a slit-check dam was evaluated based on geometry and probability. The simulated results of outflow discharge and the proportion of driftwood passed through the slit-check dam also agreed with the experimental results. Copyright Springer Science+Business Media B.V. 2012

Suggested Citation

  • Badri Shrestha & Hajime Nakagawa & Kenji Kawaike & Yasuyuki Baba & Hao Zhang, 2012. "Driftwood deposition from debris flows at slit-check dams and fans," 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. 61(2), pages 577-602, March.
    • Handle: RePEc:spr:nathaz:v:61:y:2012:i:2:p:577-602
    DOI: 10.1007/s11069-011-9939-9
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    References listed on IDEAS

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    1. Der-Guey Lin & Sen-Yen Hsu & Kuang-Tsung Chang, 2009. "Numerical simulations of flow motion and deposition characteristics of granular debris flows," 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. 50(3), pages 623-650, September.
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    Cited by:

    1. Mehmet Cihan Aydin & Havva Seda Aytemur & Ali Emre Ulu, 2022. "Experimental and Numerical Investigation on Hydraulic Performance of Slit-check Dams in Subcritical Flow Condition," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(5), pages 1693-1710, March.

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