Tsunamis generated by subaerial landslides: From laboratory experiments to geophysical events

Date 2021-03
Author(s) Robbe-Saule Manon1, 2, Morize CyprienORCID1, Bertho YannORCID1, Sauret AlbanORCID3, Hildenbrand AnthonyORCID2, Gondret Philippe1
Affiliation(s) 1 : Université Paris-Saclay, CNRS, Laboratoire FAST, 91405, Orsay, France
2 : Université Paris-Saclay, CNRS, Laboratoire GEOPS, 91405, Orsay, France
3 : Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106, USA
DOI 10.17882/75297
Publisher SEANOE
Abstract

Modeling of tsunami waves generated by subaerial landslides is important to provide accurate hazard and risk assessments in coastal areas. We perform small-scale laboratory experiments where a tsunami-like wave is generated by the collapse of a subaerial granular column into water. The maximal amplitude of the leading wave is shown to scale linearly with the instantaneous immersed volume of grains and sublinearly with the final immersed deposit. From available measurements of the immersed deposits of past geophysical events, the maximal amplitude of the generated wave predicted by our empirical law is in good agreement with previous numerical or experimental modelings based on the inland geometry of the slide. Our results suggest that o shore deposits of past landslides can be used to constrain the amplitude of paleo-tsunamis.

Licence CC0
Data
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How to cite 

Robbe-Saule Manon, Morize Cyprien, Bertho Yann, Sauret Alban, Hildenbrand Anthony, Gondret Philippe (2021). Tsunamis generated by subaerial landslides: From laboratory experiments to geophysical events. SEANOE. https://doi.org/10.17882/75297