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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/nhess-2020-172
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2020-172
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  15 Sep 2020

15 Sep 2020

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This preprint is currently under review for the journal NHESS.

Multilayer-HySEA model validation for landslide generated tsunamis. Part II Granular slides

Jorge Macías, Cipriano Escalante, and Manuel J. Castro Jorge Macías et al.
  • Departamento de Análisis Matemático, Estadística e Investigacíon Operativa y Matemática Aplicada, Facultad de Ciencias, Universidad de Málaga, 29080-Málaga

Abstract. The overall objective of the present work is to benchmark the novel Multilayer-HySEA model using laboratory experiment data for landslide generated tsunamis. In particular, this second part of the work deals with granular slides, while the first part, in a companion paper, considers rigid slides. The experimental data used have been proposed by the US National Tsunami Hazard and Mitigation Program (NTHMP) and established for the NTHMP Landslide Benchmark Workshop, held in January 2017 at Galveston. Three of the seven benchmark problems proposed in that workshop dealt with tsunamis generated by rigid slides and are collected in the companion paper (Macías et al., 2020). Another three benchmarks considered tsunamis generated by granular slides. They are the subject of the present study. In order to reproduce the laboratory experiments dealing with granular slides, two models need to be coupled, one for the granular slide and a second one for the water dynamics. The coupled model used consists of a new and efficient hybrid finite volume/finite difference implementation on GPU architectures of a non-hydrostatic multilayer model coupled with a Savage-Hutter model. A brief description of model equations and the numerical scheme is included. The dispersive properties of the multilayer model can be found in the companion paper. Then, results for the three NTHMP benchmark problems dealing with tsunamis generated by granular slides are presented with a description of each benchmark problem.

Jorge Macías et al.

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Jorge Macías et al.

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Numerical results in Multilayer-HySEA model validation for landslide generated tsunamis. Part II Granular slides J. Macías, C. Escalante and M. J. Castro https://doi.org/10.17632/94txtn9rvw.1

Jorge Macías et al.

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Latest update: 27 Nov 2020
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Short summary
Numerical models need to be validated previous to their use as predictive tools. This requirement becomes even more necessary when these models are going to be used for risk assessment in natural hazards where human lives are involved. The present work aims to benchmark the novel Multilayer-HySEA model for landslide generated tsunamis produced by granular slides, in order to provide to the tsunami community with a robust, efficient and reliable tool for landslide tsunami hazard assessment.
Numerical models need to be validated previous to their use as predictive tools. This...
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