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The Momentum Transfer Mechanism of a Landslide Intruding a Body of Water

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  • Zhenzhu Meng

    (School of Water Conservancy and Environment Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
    Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Hangzhou 310018, China)

  • Jianyong Hu

    (School of Geomatics and Municipal Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China)

  • Jinxin Zhang

    (School of Water Conservancy and Environment Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
    Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Hangzhou 310018, China)

  • Lijuan Zhang

    (Huai’an Water Conservancy Survey and Design Institute Co., Ltd., Huai’an 223005, China)

  • Zhenxia Yuan

    (School of Civil Engineering and Architecture, Zhongyuan University of Technology, Zhengzhou 450007, China)

Abstract

Landslide-generated waves occur as a result of the intrusion of landslides such as mud flows and debris flows into bodies of water such as lakes and reservoirs. The objective of this study was to determine how the momentum is transferred from the sliding mass to the body of water on the basis of theoretical analysis and physical model experiments. Considering the viscoplastic idealization of natural landslides, the theoretical model was established based on the momentum and mass conservation of a two-phase flow in a control volume. To close the theoretical equations, slide thickness and velocity passing through the left boundary of the control volume were estimated by lubrication theory, and the interaction forces between the slide phase and water phase, including hydrostatic force and drag force, were given by semiempirical equations fitted with experimental data obtained using the particle image velocimetry (PIV) technique. The near-field velocity fields of both the sliding mass and the body of water, as well as the air–water–slide interfaces, were determined from the experiments. The theoretical model was validated by comparing the theoretical and experimental data of the slide thickness and slide velocity, as well as the momentum variations of the two phases in the control volume.

Suggested Citation

  • Zhenzhu Meng & Jianyong Hu & Jinxin Zhang & Lijuan Zhang & Zhenxia Yuan, 2023. "The Momentum Transfer Mechanism of a Landslide Intruding a Body of Water," Sustainability, MDPI, vol. 15(18), pages 1-18, September.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:18:p:13940-:d:1243578
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    References listed on IDEAS

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    1. G. Zitti & C. Ancey & M. Postacchini & M. Brocchini, 2017. "Snow avalanches striking water basins: behaviour of the avalanche’s centre of mass and front," 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. 88(3), pages 1297-1323, September.
    2. Stéphan T. Grilli & Annette R. Grilli & Eric David & Christophe Coulet, 2016. "Tsunami hazard assessment along the north shore of Hispaniola from far- and near-field Atlantic sources," 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. 82(2), pages 777-810, June.
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