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Numerical simulation of landslide-generated waves during the 11 October 2018 Baige landslide at the Jinsha River

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Abstract

Landslides at river embankments can block watercourses, imperiling the safety of vessels and downstream hydropower stations. The Baige landslide, which occurred on 11th October 2018, is taken as an example to study the landslide motion and landslide-generated wave evolutions. The elasto-viscoplastic and renormalization group (RNG) turbulence models are employed in the FLOW3D software, treating the motion of the Baige landslide as a viscous flow. Numerical results show that the maximum velocity of the slide was approximately 75 m/s when entering the Jinsha River. Further, the waves triggered by massive debris avalanches at three different locations are investigated. The maximum velocity of the landslide-generated wave and the maximum run-up in the Jinsha River reached 45 m/s and 53.9 m, respectively, on the slide axis. The maximum run-up terrain elevation of the wave was 3039.7 m. The simulation results are basically consistent with the actual field observations and fit well with high-speed flow-like landslides. In this case, the displaced water was dominant due to the significant volume of the failure mass and the shallow watercourse of the Jinsha River. The run-down waves located on the source region axis contribute to the rise of water level downstream and upstream. The results from this case study serve as a practical inspiration for research on disaster processes.

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Acknowledgments

Critical comments by the anonymous reviewers greatly improved the initial manuscript.

Funding

This study was financially supported by the National Key R&D Program of China (2017YFC1501102), the National Natural Science Foundation of China (41977229), and the Youth Science and Technology Fund of Sichuan Province (2016JQ0011).

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Authors and Affiliations

  1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, People’s Republic of China

    Yu-xiang Hu & Jia-wen Zhou

  2. Sichuan Institute of Water Resources and Hydropower Survey and Design, Chengdu, 610072, People’s Republic of China

    Zhi-you Yu

  3. College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, People’s Republic of China

    Jia-wen Zhou

Authors
  1. Yu-xiang Hu
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  2. Zhi-you Yu
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  3. Jia-wen Zhou
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Correspondence to Jia-wen Zhou.

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Hu, Yx., Yu, Zy. & Zhou, Jw. Numerical simulation of landslide-generated waves during the 11 October 2018 Baige landslide at the Jinsha River. Landslides 17, 2317–2328 (2020). https://doi.org/10.1007/s10346-020-01382-x

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  • DOI: https://doi.org/10.1007/s10346-020-01382-x

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