Comparison of landslide tsunami models and exploration of fields of application
After earthquakes, landslides are the second cause for tsunami generation. A proper understanding is required to prevent future disaster or to develop early warnings.This can be achieved through physical models in laboratory or numerical models. In the last category, several models exist and can pro...
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ftunivpau:oai:HAL:tel-03485176v1 2023-12-10T09:49:15+01:00 Comparison of landslide tsunami models and exploration of fields of application Comparaison de modèles de tsunamis générés par glissements de terrain et exploration des champs d'application Paris, Alexandre Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME) Université de Pau et des Pays de l'Adour (UPPA) Université de Pau et des Pays de l'Adour Stéphane Abadie Philippe Heinrich 2021-09-13 https://theses.hal.science/tel-03485176 https://theses.hal.science/tel-03485176/document https://theses.hal.science/tel-03485176/file/thesisparis.pdf en eng HAL CCSD NNT: 2021PAUU3027 tel-03485176 https://theses.hal.science/tel-03485176 https://theses.hal.science/tel-03485176/document https://theses.hal.science/tel-03485176/file/thesisparis.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-03485176 Earth Sciences. Université de Pau et des Pays de l'Adour, 2021. English. ⟨NNT : 2021PAUU3027⟩ Tsunami Numerical modeling Landslides Simulations numériques Glissements de terrain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2021 ftunivpau 2023-11-15T17:24:34Z After earthquakes, landslides are the second cause for tsunami generation. A proper understanding is required to prevent future disaster or to develop early warnings.This can be achieved through physical models in laboratory or numerical models. In the last category, several models exist and can provide very similar results for a case study. Among them, depth-averaged models using for example shallow water or Boussinesq equations, can be opposed to Navier-Stokes models. The main objective of this PhD thesis is to compare these two modeling strategies with two specific models, a depth-averaged model, AVALANCHE, and a Navier-Stokes model, OpenFOAM. First, two benchmarks (a subaerial and submerged one) are used to calibrate the models. This highlighted that both models could reproduce the experimental data and that several combinations of parameters led to similar results. Second, sensitivity studies are carried out to evaluate the influence of the initial landslide position and the slope angle and to observe the behavior of the different equations (shallow water, Boussinesq or Navier-Stokes) during the wave generation and propagation phases. Finally, both models are applied to two real cases, the June 17, 2017, Karrat Fjord, Greenland, landslide and tsunami, and the December 22, 2018, Anak Krakatau, Indonesia, collapse and tsunami, and are intercompared. Les effondrements gravitaires sont la deuxième cause de génération de tsunamis après les séismes. Il est important de bien les comprendre afin de prévenir de futures catastrophes ou de développer les systèmes d’alerte. Pour cela, des modèles analogiques, en laboratoire, ou numériques sont utilisés. Dans la deuxième catégorie, de nombreux modèles existent et peuvent produire des résultats similaires pour un cas donné. Parmi eux, les modèles intégrés sur la profondeur qui utilisent par exemple les équations de type shallow water ou de Boussinesq, peuvent être opposés aux modèles Navier-Stokes. L’objectif de cette thèse est de comparer ces deux stratégies à l’aide ... Doctoral or Postdoctoral Thesis Greenland HAL e2s UPPA (Université de Pau et des Pays de l'Adour) Greenland Karrat Fjord ENVELOPE(-53.667,-53.667,71.383,71.383) |
institution |
Open Polar |
collection |
HAL e2s UPPA (Université de Pau et des Pays de l'Adour) |
op_collection_id |
ftunivpau |
language |
English |
topic |
Tsunami Numerical modeling Landslides Simulations numériques Glissements de terrain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Tsunami Numerical modeling Landslides Simulations numériques Glissements de terrain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Paris, Alexandre Comparison of landslide tsunami models and exploration of fields of application |
topic_facet |
Tsunami Numerical modeling Landslides Simulations numériques Glissements de terrain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
After earthquakes, landslides are the second cause for tsunami generation. A proper understanding is required to prevent future disaster or to develop early warnings.This can be achieved through physical models in laboratory or numerical models. In the last category, several models exist and can provide very similar results for a case study. Among them, depth-averaged models using for example shallow water or Boussinesq equations, can be opposed to Navier-Stokes models. The main objective of this PhD thesis is to compare these two modeling strategies with two specific models, a depth-averaged model, AVALANCHE, and a Navier-Stokes model, OpenFOAM. First, two benchmarks (a subaerial and submerged one) are used to calibrate the models. This highlighted that both models could reproduce the experimental data and that several combinations of parameters led to similar results. Second, sensitivity studies are carried out to evaluate the influence of the initial landslide position and the slope angle and to observe the behavior of the different equations (shallow water, Boussinesq or Navier-Stokes) during the wave generation and propagation phases. Finally, both models are applied to two real cases, the June 17, 2017, Karrat Fjord, Greenland, landslide and tsunami, and the December 22, 2018, Anak Krakatau, Indonesia, collapse and tsunami, and are intercompared. Les effondrements gravitaires sont la deuxième cause de génération de tsunamis après les séismes. Il est important de bien les comprendre afin de prévenir de futures catastrophes ou de développer les systèmes d’alerte. Pour cela, des modèles analogiques, en laboratoire, ou numériques sont utilisés. Dans la deuxième catégorie, de nombreux modèles existent et peuvent produire des résultats similaires pour un cas donné. Parmi eux, les modèles intégrés sur la profondeur qui utilisent par exemple les équations de type shallow water ou de Boussinesq, peuvent être opposés aux modèles Navier-Stokes. L’objectif de cette thèse est de comparer ces deux stratégies à l’aide ... |
author2 |
Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME) Université de Pau et des Pays de l'Adour (UPPA) Université de Pau et des Pays de l'Adour Stéphane Abadie Philippe Heinrich |
format |
Doctoral or Postdoctoral Thesis |
author |
Paris, Alexandre |
author_facet |
Paris, Alexandre |
author_sort |
Paris, Alexandre |
title |
Comparison of landslide tsunami models and exploration of fields of application |
title_short |
Comparison of landslide tsunami models and exploration of fields of application |
title_full |
Comparison of landslide tsunami models and exploration of fields of application |
title_fullStr |
Comparison of landslide tsunami models and exploration of fields of application |
title_full_unstemmed |
Comparison of landslide tsunami models and exploration of fields of application |
title_sort |
comparison of landslide tsunami models and exploration of fields of application |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://theses.hal.science/tel-03485176 https://theses.hal.science/tel-03485176/document https://theses.hal.science/tel-03485176/file/thesisparis.pdf |
long_lat |
ENVELOPE(-53.667,-53.667,71.383,71.383) |
geographic |
Greenland Karrat Fjord |
geographic_facet |
Greenland Karrat Fjord |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
https://theses.hal.science/tel-03485176 Earth Sciences. Université de Pau et des Pays de l'Adour, 2021. English. ⟨NNT : 2021PAUU3027⟩ |
op_relation |
NNT: 2021PAUU3027 tel-03485176 https://theses.hal.science/tel-03485176 https://theses.hal.science/tel-03485176/document https://theses.hal.science/tel-03485176/file/thesisparis.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784893599792496640 |