From laboratory experiments to geophysical tsunamis generated by subaerial landslides

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 gravity-driven collapse of a subaerial granular column into water. We...

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Bibliographic Details
Published in:Scientific reports 2021-09, Vol.11 (1), p.18437-18437, Article 18437
Main Authors: Robbe-Saule, Manon, Morize, Cyprien, Bertho, Yann, Sauret, Alban, Hildenbrand, Anthony, Gondret, Philippe
Format: Article
Language:English
Subjects:
639/766/189
704/4111
Coastal zone
Environmental Sciences
Experiments
Humanities and Social Sciences
Laboratories
Landslides
multidisciplinary
Physics
Risk assessment
Science
Science (multidisciplinary)
Sciences of the Universe
Tsunamis
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Summary: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 gravity-driven collapse of a subaerial granular column into water. We show that the maximal amplitude reached near-shore by the generated wave in our experiments is linked to the instantaneous immersed volume of grains and to the ultimate immersed deposit. Despite the differences in scale and geometry between our small-scale experiments and the larger-scale geophysical events, a rather good agreement is found between the experimental law and the field data. This approach offers an easy way to estimate the amplitude of paleo-tsunamis.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-96369-6