Generation and prediction of water waves induced by rigid piston-like landslide

Pengfeng Li, Haixiao Jing () and Guodong Li
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Pengfeng Li: Xi’an University of Technology
Haixiao Jing: Xi’an University of Technology
Guodong Li: Xi’an University of Technology

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2024, vol. 120, issue 3, No 23, 2683-2704

Abstract: Abstract Accurate prediction of water waves generated by landslides is of significant importance in the early warning and risk assessment of landslide disasters. And previous studies shown that landslide-induced waves are of various types, which indicates that there are different generation regimes for landslide-induced waves. In the present study, the generation of water waves by a rigid landslide is studied numerically and theoretically. According to the motion characteristics of a landslide, three types of landslide motions, including piston-like, plunger-like, and transition landslide motions, are detected. The performed analyses demonstrate that the solitary-like wave and dissipative transient bore are generated by piston-like landslides. Moreover, nonlinear oscillatory and transition waves are generated by plunger-like and transition landslides, respectively. It is also found that the wave height generated by piston-like landslide depends on the effective velocity of fluid translated by the landslide. For piston-like landslide motion, the correlation between the wave height, wavelength, and the effective velocity of a rigid landslide is established theoretically, and then, it is verified using numerical results. The present study is expected to provide a reference to investigate early warning of landslide-induced waves.

Keywords: Landslide-induced waves; Rigid piston-like landslide; Solitary-like wave; Dissipative transient bore; Wave height (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11069-023-06300-7

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