Numerical Simulations of Tsunami Wave Generation by Submarine Landslides: Validation and Sensitivity Analysis to Landslide Parameters

Ramtin Sabeti; Mohammad Heidarzadeh

doi:10.1061/(ASCE)WW.1943-5460.0000694

Numerical Simulations of Tsunami Wave Generation by Submarine Landslides: Validation and Sensitivity Analysis to Landslide Parameters

Ramtin Sabeti, Mohammad Heidarzadeh

Brunel University

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

12 Citations (SciVal)

Abstract

Submarine landslide-generated waves have been responsible for significant damage to coastal communities worldwide. Despite this, the existing knowledge on the mechanism of the phenomenon is limited that can be partly attributed to the absence of adequate validated numerical models. In this study, we applied and validated a Computational Fluid Dynamics numerical model (FLOW3D-Hydro) and used it for investigating the sensitivity of landslide-generated waves to the variations of different parameters. This study is limited to solid-block submarine landslides moving downward at a fixed slope angle of 45°. We conducted 177 simulations applying the validated model by using three different sliding block sizes (small, medium, and large). The experiments revealed an inverse exponential relationship between maximum initial landslide amplitude and both initial submergence depth and travel distance. We observed that the dominant wave period generated by the large block was 0.7 s whereas it was 1.1 s for the small block; this unexpected result could be attributed to the relatively lower velocity of the sliding mass for the case of the smaller block.

Original language	English
Article number	e0000694
Journal	Journal of Waterway, Port, Coastal and Ocean Engineering
Volume	148
Issue number	2
Early online date	22 Nov 2021
DOIs	https://doi.org/10.1061/(ASCE)WW.1943-5460.0000694
Publication status	Published - 31 Mar 2022

Bibliographical note

Funding Information:
The authors are sincerely grateful to Mr. Mark Keating (Flow Science Inc.) for his invaluable guidance and support during the modeling process. We gratefully thank Professor Vijaykumar G. Panchang (Texas A & M University, USA) for his constructive comments on this manuscript before submission. The license for using the software FLOW3D-Hydro was granted by Flow Science Inc. to Brunel University London. The authors are sincerely grateful to three anonymous reviewers and the editor for their constructive comments. This study is funded by the Royal Society (the United Kingdom) Grant No. CHL\R1\180173.

Publisher Copyright:
© 2021 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.

Funding

The authors are sincerely grateful to Mr. Mark Keating (Flow Science Inc.) for his invaluable guidance and support during the modeling process. We gratefully thank Professor Vijaykumar G. Panchang (Texas A & M University, USA) for his constructive comments on this manuscript before submission. The license for using the software FLOW3D-Hydro was granted by Flow Science Inc. to Brunel University London. The authors are sincerely grateful to three anonymous reviewers and the editor for their constructive comments. This study is funded by the Royal Society (the United Kingdom) Grant No. CHL\R1\180173.

Keywords

Landslide-generated waves
Numerical simulations
Physical modeling
Submarine landslide
Tsunami

ASJC Scopus subject areas

Civil and Structural Engineering
Water Science and Technology
Ocean Engineering

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10.1061/(ASCE)WW.1943-5460.0000694Licence: CC BY

Cite this

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title = "Numerical Simulations of Tsunami Wave Generation by Submarine Landslides: Validation and Sensitivity Analysis to Landslide Parameters",

abstract = "Submarine landslide-generated waves have been responsible for significant damage to coastal communities worldwide. Despite this, the existing knowledge on the mechanism of the phenomenon is limited that can be partly attributed to the absence of adequate validated numerical models. In this study, we applied and validated a Computational Fluid Dynamics numerical model (FLOW3D-Hydro) and used it for investigating the sensitivity of landslide-generated waves to the variations of different parameters. This study is limited to solid-block submarine landslides moving downward at a fixed slope angle of 45°. We conducted 177 simulations applying the validated model by using three different sliding block sizes (small, medium, and large). The experiments revealed an inverse exponential relationship between maximum initial landslide amplitude and both initial submergence depth and travel distance. We observed that the dominant wave period generated by the large block was 0.7 s whereas it was 1.1 s for the small block; this unexpected result could be attributed to the relatively lower velocity of the sliding mass for the case of the smaller block.",

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N2 - Submarine landslide-generated waves have been responsible for significant damage to coastal communities worldwide. Despite this, the existing knowledge on the mechanism of the phenomenon is limited that can be partly attributed to the absence of adequate validated numerical models. In this study, we applied and validated a Computational Fluid Dynamics numerical model (FLOW3D-Hydro) and used it for investigating the sensitivity of landslide-generated waves to the variations of different parameters. This study is limited to solid-block submarine landslides moving downward at a fixed slope angle of 45°. We conducted 177 simulations applying the validated model by using three different sliding block sizes (small, medium, and large). The experiments revealed an inverse exponential relationship between maximum initial landslide amplitude and both initial submergence depth and travel distance. We observed that the dominant wave period generated by the large block was 0.7 s whereas it was 1.1 s for the small block; this unexpected result could be attributed to the relatively lower velocity of the sliding mass for the case of the smaller block.

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Numerical Simulations of Tsunami Wave Generation by Submarine Landslides: Validation and Sensitivity Analysis to Landslide Parameters

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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