Preliminary flood risk assessment: The case of Athens

Kandilioti, G; Makropoulos, C

dc.contributor.author	Kandilioti, G	en
dc.contributor.author	Makropoulos, C	en
dc.date.accessioned	2014-03-01T02:12:03Z
dc.date.available	2014-03-01T02:12:03Z
dc.date.issued	2012	en
dc.identifier.issn	0921030X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29996
dc.subject	Floods	en
dc.subject	GIS	en
dc.subject	Multicriteria evaluation (MCE)	en
dc.subject	Sensitivity analysis	en
dc.subject	Uncertainty	en
dc.subject	Vulnerability	en
dc.subject.other	flood	en
dc.subject.other	GIS	en
dc.subject.other	mapping method	en
dc.subject.other	multicriteria analysis	en
dc.subject.other	regulatory framework	en
dc.subject.other	risk assessment	en
dc.subject.other	sensitivity analysis	en
dc.subject.other	spatial distribution	en
dc.subject.other	uncertainty analysis	en
dc.subject.other	urban area	en
dc.subject.other	Athens [Attica]	en
dc.subject.other	Attica	en
dc.subject.other	Greece	en
dc.title	Preliminary flood risk assessment: The case of Athens	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11069-011-9930-5	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11069-011-9930-5	en
heal.publicationDate	2012	en
heal.abstract	Flood mapping, especially in urban areas, is a demanding task requiring substantial (and usually unavailable) data. However, with the recent introduction of the EU Floods Directive (2007/60/EC), the need for reliable, but cost effective, risk mapping at the regional scale is rising in the policy agenda. Methods are therefore required to allow for efficiently undertaking what the Directive terms ""preliminary flood risk assessment,"" in other words a screening of areas that could potentially be at risk of flooding and that consequently merit more detailed attention and analysis. Such methods cannot rely on modeling, as this would require more data and effort that is reasonable for this high-level, screening phase. This is especially true in urban areas, where modeling requires knowledge of the detailed urban terrain, the drainage networks, and their interactions. A GIS-based multicriteria flood risk assessment methodology was therefore developed and applied for the mapping of flood risk in urban areas. This approach quantifies the spatial distribution of flood risk and is able to deal with uncertainties in criteria values and to examine their influence on the overall flood risk assessment. It can further assess the spatially variable reliability of the resulting maps on the basis of the choice of method used to develop the maps. The approach is applied to the Greater Athens area and validated for its central and most urban part. A GIS database of economic, social, and environmental criteria contributing to flood risk was created. Three different multicriteria decision rules (Analytical Hierarchy Process, Weighted Linear Combination and Ordered Weighting Averaging) were applied, to produce the overall flood risk map of the area. To implement this methodology, the IDRISI Andes GIS software was customized and used. It is concluded that the results of the analysis are a reasonable representation of actual flood risk, on the basis of their comparison with historical flood events. © 2011 Springer Science+Business Media B.V.	en
heal.journalName	Natural Hazards	en
dc.identifier.doi	10.1007/s11069-011-9930-5	en
dc.identifier.volume	61	en
dc.identifier.issue	2	en
dc.identifier.spage	441	en
dc.identifier.epage	468	en