Application of ‘shallow-water’ numerical models for hazard assessment of volcanic flows: the TITAN2D model
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| Autores: | , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2015 |
| Descripción: | This paper introduces Titan2D, a depth averaged model of an incompressible Coulomb continuum for “shallow water” granular flows. Titan2D has been used successfully at many volcanoes to predict inundation by block-and-ash flows and debris avalanches. It can be run as a stand-alone program or through Vhub, a cyber-infrastructure platform. Practical considerations of choosing appropriate user inputs and the basics of running the model are discussed herein. Both synthetic and natural terrain examples are presented, including simulations of a block-and-ash flow generated from the gravitational collapse of a synthetic dome at Turrialba volcano (Costa Rica). These results suggest that the model should be limited to simulate cases of dense volcanic granular flows, like those produced by gravity-driven dome collapse events, but cannot be used to simulate dilute pyroclastic density currents. Finally, estimation of the Titan2D resistance terms by using empirical relationships provides a good method for reducing model input uncertainties |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/19021 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/geologica/article/view/19021 |
| Palabra clave: | Modelación numérica Titan2D volcán Turrialba ecuaciones de aguas someras peligros volcánicos análisis de peligros avalancha de detritos flujos block-and-ash Numerical modeling Turrialba volcano shallow-water equations volcanic hazards hazard assessment debris avalanche block-and-ash flows |