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  3. Mass Movement-Induced Tsunami Hazard on Perialpine Lake Lucerne (Switzerland): Scenarios and Numerical Experiments
 

Mass Movement-Induced Tsunami Hazard on Perialpine Lake Lucerne (Switzerland): Scenarios and Numerical Experiments

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BORIS DOI
10.7892/boris.63586
Date of Publication
2015
Publication Type
Article
Division/Institute

Institut für Geologie...

Author
Hilbe, Michael
Institut für Geologie
Anselmetti, Flavioorcid-logo
Institut für Geologie
Subject(s)

500 - Science::550 - ...

Series
Pure and Applied Geophysics
ISSN or ISBN (if monograph)
0033-4553
Publisher
Springer
Language
English
Publisher DOI
10.1007/s00024-014-0907-7
Description
Previous studies of the sediments of Lake Lucerne have shown that massive subaqueous mass movements affecting unconsolidated sediments on lateral slopes are a common process in this lake, and, in view of historical reports describing damaging waves on the lake, it was suggested that tsunamis generated by mass movements represent a considerable natural hazard on the lakeshores. Newly performed numerical simulations combining two-dimensional, depth-averaged models for mass-movement propagation and for tsunami generation, propagation and inunda- tion reproduce a number of reported tsunami effects. Four analysed mass-movement scenarios—three based on documented slope failures involving volumes of 5.5 to 20.8 9 106 m3—show peak wave heights of several metres and maximum runup of 6 to [10 m in the directly affected basins, while effects in neighbouring basins are less drastic. The tsunamis cause large-scale inundation over distances of several hundred metres on flat alluvial plains close to the mass-movement source areas. Basins at the ends of the lake experience regular water-level oscillations with characteristic periods of several minutes. The vulnerability of potentially affected areas has increased dramatically since the times of the damaging historical events, recommending a thorough evaluation of the hazard.
Handle
https://boris-portal.unibe.ch/handle/20.500.12422/129585
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HilbePAGEOPH.pdftextAdobe PDF4.66 MBpublisherpublishedOpen
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