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Authors: | Tarquini, S.* Favalli, M.* |
Title: | Changes of the susceptibility to lava flow invasion induced by morphological modifications of an active volcano: the case of Mount Etna, Italy | Journal: | Natural Hazards | Series/Report no.: | 2/54(2010) | Publisher: | Springer | Issue Date: | 2010 | DOI: | 10.1007/s11069-009-9484-y | Keywords: | Lava flow simulation Digital Elevation Model Lidar Time series Lava flow hazard maps |
Subject Classification: | 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk 05. General::05.08. Risk::05.08.99. General or miscellaneous |
Abstract: | Changes of the susceptibility to lava flow invasion at Mount Etna are quantified by using lava flow simulations on four Digital Elevation Models documenting the morphostructural modifications of the volcano in the time interval 1986–2007. The probabilistic code DOWNFLOW is used to derive the areas invaded by several thousands of lava flows obtaining, for each DEM, maps of the susceptibility to lava flow invasion and of the lava flow hazard. These maps show, for the first time, the evolution of these surficial properties with time, and render a quantitative image of the effects of topographic changes on the preferential lava flow drainage paths. The results illustrate how the emplacement of new lava flows and the growth of scoria cones affect the probability of inundation by lava flows. We conclude that the persistent activity of this volcano requires a frequent updating of the topography for a reliable lava flow hazard assessment. |
Appears in Collections: | Article published / in press |
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