Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8221
AuthorsMarzocchi, W.* 
Garcia-Aristizabal, A.* 
Gasparini, P.* 
Mastellone, M. L.* 
Di Ruocco, A.* 
TitleBasic principles of multi-risk assessment: a case study in Italy
Issue DateJun-2012
Series/Report no.62/2(2012)
DOI10.1007/s11069-012-0092-x
URIhttp://hdl.handle.net/2122/8221
Keywordsmulti-risk assessment
hazard interaction
Subject Classification04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk 
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk 
05. General::05.01. Computational geophysics::05.01.04. Statistical analysis 
05. General::05.08. Risk::05.08.01. Environmental risk 
AbstractThe assessment of the impact of different catastrophic events in a given area requires innovative approaches that allow risks comparison and that account for all the possible risk interactions. In the common practice, the risk evaluation related to different sources is generally done through independent analyses, adopting disparate procedures and time–space resolutions. Such a strategy of risks evaluation has some evident major drawbacks as, for example, it is difficult (if not impossible) to compare the risk of different origins, and the implicit assumption of independence of the risk sources leads to neglect possible interactions among threats and/or cascade effects. The latter may amplify the overall risk, and potentially the multi-risk index could be higher than the simple aggre- gation of single-risk indexes calculated considering each source as independent from the others. In this paper, we put forward some basic principles for multi-risk assessment, and we consider a real application to Casalnuovo municipality (Southern Italy), in which we face the problem to make different hazards comparable, and we highlight when and how possible interactions among different threats may become important.
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