2024-03-28T20:01:51Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1631152018-07-16T09:24:55Zcom_10261_82com_10261_8col_10261_461
DIGITAL.CSIC
author
Martí Molist, Joan
author
Becerril, Laura
author
Bartolini, Stefania
2018-04-04T07:48:14Z
2018-04-04T07:48:14Z
2017-04-23
Geophysical Research Abstracts, 19: EGU2017-5538-4 (2017)
http://hdl.handle.net/10261/163115
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.
eng
openAccess
volcanism
Lava flow modelling in long and short-term hazard assessment
póster de congreso
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URL
https://digital.csic.es/bitstream/10261/163115/1/Marti_EGU2017-5538-4.pdf
File
MD5
e6f65bd610d41420c42cc38ff7e7c62f
35798
application/pdf
Marti_EGU2017-5538-4.pdf