LiDAR-based digital terrain analysis of an area exposed to the risk of lava flow invasion: the Zafferana Etnea territory, Mt. Etna (Italy) |
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Authors: | Marina Bisson Boris Behncke Alessandro Fornaciai Marco Neri |
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Institution: | (1) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, via della Faggiola, 32, 56126 Pisa, Italy;(2) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Piazza Roma, 2, 95123 Catania, Italy |
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Abstract: | The town of Zafferana Etnea, located on the southeastern slope of Mt. Etna volcano (Italy), has been repeatedly threatened
by lava flows in recent centuries. The last serious threat occurred during the 1991–1993 eruption, when the lava front came
to a halt only 1.7 km from the centre of town. Morphostructural data derived from light detection and ranging (LiDAR) surveys
carried out on Etna in 2005 have enabled us to evaluate the risk of lava invasion in a section (16 km2) of the Zafferana Etnea territory. Qualitative and quantitative results are obtained combining the information derived from
LiDAR analysis with geological, morphological and structural data using geographic information systems technology (GIS). The
study quantifies in unprecedented detail the areal extent and volume of forested and urban areas and its degree of exposure
to different levels of hazard from future lava invasion. Nearly 52% of the urban texture fall into areas of moderate to high
risk from lava invasion. Future land use planning should take these findings into account and promote new development preferentially
in areas of lower risk. |
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Keywords: | LiDAR Etna Lava flow hazard Land use planning |
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