Estimating maximum initial wave amplitude of subaerial landslide tsunamis: a three-dimensional modelling approach

Ramtin Sabeti; Mohammad Heidarzadeh

doi:10.1016/j.ocemod.2024.102360

Estimating maximum initial wave amplitude of subaerial landslide tsunamis: a three-dimensional modelling approach

Ramtin Sabeti, Mohammad Heidarzadeh

Research output: Contribution to journal › Article › peer-review

2 Citations (SciVal)

Abstract

Landslide tsunamis, responsible for thousands of deaths and significant damage in recent years, necessitate the allocation of sufficient time and resources for studying these extreme natural hazards. This study offers a step change in the field by conducting a large number of three-dimensional numerical experiments, validated by physical tests, to develop a predictive equation for the maximum initial amplitude of tsunamis generated by subaerial landslides. We first conducted a few 3D physical experiments in a wave basin which were then applied for the validation of a 3D numerical model based on the Flow3D-HYDRO package. Consequently, we delivered 100 simulations using the validated model by varying parameters such as landslide volume, water depth, slope angle and travel distance. This large database was subsequently employed to develop a predictive equation for the maximum initial tsunami amplitude. For the first time, we considered travel distance as an independent parameter for developing the predictive equation, which can significantly improve the predication accuracy. The predictive equation was tested for the case of the 2018 Anak Krakatau subaerial landslide tsunami and produced satisfactory results.

Original language	English
Article number	102360
Number of pages	36
Journal	Ocean Modelling
Volume	189
Early online date	13 Mar 2024
DOIs	https://doi.org/10.1016/j.ocemod.2024.102360
Publication status	Published - 30 Jun 2024

Bibliographical note

Authors are sincerely grateful to the laboratory technician team, particularly Mr William Bazeley, at the Faculty of Engineering, University of Bath for their support during the laboratory physical modelling of this research. We appreciate the valuable insights provided by Mr. Brian Fox Senior CFD Engineer at Flow Science, Inc. regarding air entrainment modelling in FLOW-3D HYDRO.

Data Availability Statement

All data used in this study are given in the body of the article.

Funding

RS is supported by the Leverhulme Trust Grant No. RPG-2022-306. MH is funded by open funding of State Key Lab of Hydraulics and Mountain River Engineering, Sichuan University, grant number SKHL2101. We acknowledge University of Bath Institutional Open Access Fund.

Funders	Funder number
The Leverhulme Trust	RPG-2022-306
Sichuan University	SKHL2101

Keywords

FLOW-3D HYDRO
Numerical simulation
Physical modelling
Subaerial landslide
Tsunami

ASJC Scopus subject areas

Computer Science (miscellaneous)
Geotechnical Engineering and Engineering Geology
Oceanography
Atmospheric Science

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10.1016/j.ocemod.2024.102360Licence: CC BY

Cite this

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title = "Estimating maximum initial wave amplitude of subaerial landslide tsunamis: a three-dimensional modelling approach",

abstract = "Landslide tsunamis, responsible for thousands of deaths and significant damage in recent years, necessitate the allocation of sufficient time and resources for studying these extreme natural hazards. This study offers a step change in the field by conducting a large number of three-dimensional numerical experiments, validated by physical tests, to develop a predictive equation for the maximum initial amplitude of tsunamis generated by subaerial landslides. We first conducted a few 3D physical experiments in a wave basin which were then applied for the validation of a 3D numerical model based on the Flow3D-HYDRO package. Consequently, we delivered 100 simulations using the validated model by varying parameters such as landslide volume, water depth, slope angle and travel distance. This large database was subsequently employed to develop a predictive equation for the maximum initial tsunami amplitude. For the first time, we considered travel distance as an independent parameter for developing the predictive equation, which can significantly improve the predication accuracy. The predictive equation was tested for the case of the 2018 Anak Krakatau subaerial landslide tsunami and produced satisfactory results.",

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author = "Ramtin Sabeti and Mohammad Heidarzadeh",

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N2 - Landslide tsunamis, responsible for thousands of deaths and significant damage in recent years, necessitate the allocation of sufficient time and resources for studying these extreme natural hazards. This study offers a step change in the field by conducting a large number of three-dimensional numerical experiments, validated by physical tests, to develop a predictive equation for the maximum initial amplitude of tsunamis generated by subaerial landslides. We first conducted a few 3D physical experiments in a wave basin which were then applied for the validation of a 3D numerical model based on the Flow3D-HYDRO package. Consequently, we delivered 100 simulations using the validated model by varying parameters such as landslide volume, water depth, slope angle and travel distance. This large database was subsequently employed to develop a predictive equation for the maximum initial tsunami amplitude. For the first time, we considered travel distance as an independent parameter for developing the predictive equation, which can significantly improve the predication accuracy. The predictive equation was tested for the case of the 2018 Anak Krakatau subaerial landslide tsunami and produced satisfactory results.

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Estimating maximum initial wave amplitude of subaerial landslide tsunamis: a three-dimensional modelling approach

Abstract

Bibliographical note

Data Availability Statement

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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