2024-03-29T12:05:39Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1631152018-07-16T09:24:55Zcom_10261_82com_10261_8col_10261_461
Lava flow modelling in long and short-term hazard assessment
Martí Molist, Joan
Becerril, Laura
Bartolini, Stefania
volcanism
Lava flows constitute the commonest volcano hazard resulting from a non-explosive eruption, especially in
basaltic systems. These flows come in many shapes and sizes and have a wide range of surface morphology
(pahoehoe, aa, blocky, etc.) whose differences are mainly controlled by variations in magma viscosity and supply
rates at the time of the eruption. The principal constraint on lava emplacement is topography and so flows will
tend to invade the lowest-lying areas. Modelling such complex non-Newtonian flows is not an easy task, as many
of the parameters required to precisely define flow behaviour are not known. This is one of the reasons, in addition
to the required high computing cost, for which deterministic models are not preferred when conducting long and
short term hazard assessment. On the contrary, probabilistic models, despite being much less precise, offer a rapid
approach to lava flow invasion and fulfil the main needs required in lava flow hazard analysis, with a much less
computational demand and, consequently, offering a much wider applicability. In this contribution we analyse the
main problems that exist in lava flow modelling, compare between deterministic and probabilistic models, and
show the application of probabilistic models in long and short-term hazard assessment.
2018-04-04T07:48:14Z
2018-04-04T07:48:14Z
2017-04-23
2018-04-04T07:48:14Z
póster de congreso
Geophysical Research Abstracts, 19: EGU2017-5538-4 (2017)
http://hdl.handle.net/10261/163115
eng
Publisher's version
Sí
https://creativecommons.org/licenses/by/3.0/
openAccess
European Geosciences Union