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| Titel |
Assessing the efficiency and the criticality of the elements belonging to a complex territorial system subject to natural hazards |
| VerfasserIn |
R. Minciardi, R. Sacile, E. Trasforini |
| 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 ; 6, no. 1 ; Nr. 6, no. 1 (2006-01-02), S.21-32 |
| Datensatznummer |
250003277
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| Publikation (Nr.) |
 copernicus.org/nhess-6-21-2006.pdf |
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| Zusammenfassung |
| The effects of natural hazards can be mitigated by the use of proper
"pre-event" interventions on "key" elements of the territory, that is on
elements that are mostly vulnerable to a given catastrophic scenario and
whose loss of functionality can cause damages on people, property and
environment. In this respect, methodologies and tools should be studied to
support decision makers in the analysis of a territory, in order to point
out such elements. In this work, vulnerability is taken into account under
two aspects: "physical vulnerability", which measures the propensity of a
territorial element to suffer damage when subject to an external stress
corresponding to the occurrence of a natural phenomenon; "functional
vulnerability", which measures the propensity of a territorial element to
suffer loss in functionality, even when that is caused by the loss of
functionality of other territorial elements. In the proposed modeling
approach, vulnerability is represented through the use of a graph-based
formalization. A territorial system is represented as a complex set of
elements or sub-systems. Such elements have differentiated and dedicated
functions, and they may be functionally interconnected among them. In
addition, vulnerability is defined through the use of two different
variables, namely the criticality and the efficiency. Focusing the attention
on the temporal phases corresponding to the occurrence of a calamitous
event, the first one measures the service demand of an element, whereas the
efficiency is a measure of the service that can be offered by such an
element. The approach presented is largely independent from the natural risk
considered. Besides, the tools introduced for the vulnerability analysis of
the territorial system can also be used to formalize decision problems
relevant to the location of the available resources for emergency
management. A specific case study pertaining to the hydrological risk in the
Val di Vara area (Italy) is presented. |
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