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| Titel |
KULTURisk regional risk assessment methodology for water-related natural hazards – Part 2: Application to the Zurich case study |
| VerfasserIn |
P. Ronco, M. Bullo, S. Torresan, A. Critto, R. Olschewski, M. Zappa, A. Marcomini |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 3 ; Nr. 19, no. 3 (2015-03-27), S.1561-1576 |
| Datensatznummer |
250120670
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| Publikation (Nr.) |
 copernicus.org/hess-19-1561-2015.pdf |
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| Zusammenfassung |
| The aim of this paper is the application of the KULTURisk regional risk assessment
(KR-RRA) methodology, presented in the companion paper (Part 1,
Ronco et al., 2014), to the Sihl River basin, in northern Switzerland. Flood-related risks have been assessed for
different receptors lying on the Sihl River valley including Zurich, which represents a typical case
of river flooding in an urban area, by calibrating the
methodology to the site-specific context and features. Risk maps and
statistics have been developed using a 300-year return period scenario for
six relevant targets exposed to flood risk: people; economic
activities: buildings, infrastructure and agriculture; natural
and semi-natural systems; and cultural heritage. Finally, the total risk
index map has been produced to visualize the spatial pattern of flood risk
within the target area and, therefore, to identify and rank areas and
hotspots at risk by means of multi-criteria decision analysis (MCDA) tools.
Through a tailored participatory approach, risk maps supplement the
consideration of technical experts with the (essential) point of view of
relevant stakeholders for the appraisal of the specific scores weighting for
the different receptor-relative risks. The total risk maps obtained for the
Sihl River case study are associated with the lower classes of risk. In
general, higher (relative) risk scores are spatially concentrated in the
deeply urbanized city centre and areas
that lie just above to river course. Here, predicted injuries and
potential fatalities are mainly due to high population density and to the presence
of vulnerable people; flooded buildings are mainly classified as
continuous and discontinuous urban fabric; flooded roads, pathways and
railways, most of them in regards to the Zurich central station
(Hauptbahnhof) are at high risk of inundation, causing severe indirect
damage. Moreover, the risk pattern for agriculture, natural and
semi-natural systems and cultural heritage is relatively less important
mainly because the scattered presence of these assets. Finally, the
application of the KR-RRA methodology to the Sihl River case study, as well
as to several other sites across Europe (not presented here), has
demonstrated its flexibility and the possible adaptation of it to different
geographical and socioeconomic contexts, depending on data availability and
particulars of the sites, and for other (hazard) scenarios. |
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