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| Titel |
Applying and validating the PTVA-3 Model at the Aeolian Islands, Italy: assessment of the vulnerability of buildings to tsunamis |
| VerfasserIn |
F. Dall'Osso, A. Maramai, L. Graziani, B. Brizuela, A. Cavalletti, M. Gonella, S. Tinti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 7 ; Nr. 10, no. 7 (2010-07-15), S.1547-1562 |
| Datensatznummer |
250008312
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| Publikation (Nr.) |
 copernicus.org/nhess-10-1547-2010.pdf |
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| Zusammenfassung |
The volcanic archipelago of the Aeolian Islands (Sicily, Italy) is included
on the UNESCO World Heritage list and is visited by more than
200 000 tourists per year. Due to its geological characteristics, the risk
related to volcanic and seismic activity is particularly high. Since 1916 the
archipelago has been hit by eight local tsunamis. The most recent and intense
of these events happened on 30 December 2002. It was triggered by two
successive landslides along the north-western side of the Stromboli volcano
(Sciara del Fuoco), which poured approximately 2–3×107 m3 of
rocks and debris into the Tyrrhenian Sea. The waves impacted across the whole
archipelago, but most of the damage to buildings and infrastructures occurred
on the islands of Stromboli (maximum run-up 11 m) and Panarea.
The aim of this study is to assess the vulnerability of buildings to damage
from tsunamis located within the same area inundated by the 2002 event. The
assessment is carried out by using the PTVA-3 Model (Papathoma Tsunami
Vulnerability Assessment, version 3). The PTVA-3 Model calculates a Relative
Vulnerability Index (RVI) for every building, based on a set of selected
physical and structural attributes. Run-up values within the area inundated
by the 2002 tsunami were measured and mapped by the Istituto Italiano di
Geofisica e Vulcanologia (INGV) and the University of Bologna during field
surveys in January 2003. Results of the assessment show that if the same
tsunami were to occur today, 54 buildings would be affected in Stromboli,
and 5 in Panarea. The overall vulnerability level obtained in this analysis
for Stromboli and Panarea are "average"/"low" and "very low",
respectively. Nonetheless, 14 buildings in Stromboli are classified as
having a "high" or "average" vulnerability. For some buildings, we were
able to validate the RVI scores calculated by the PTVA-3 Model through a
qualitative comparison with photographs taken by INGV and the University of
Bologna during the post-tsunami survey. With the exception of a single
structure, which is partially covered by a coastal dune on the seaward side,
we found a good degree of accuracy between the PTVA-3 Model forecast
assessments and the actual degree of damage experienced by buildings. This
validation of the model increases our confidence in its predictive
capability. Given the high tsunami risk for the archipelago, our results
provide a framework for prioritising investments in prevention measures and
addressing the most relevant vulnerability issues of the built environment,
particularly on the island of Stromboli. |
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