Abstract
Abstract. This study aims to develop a new procedure that combines multi-criteria spatial vulnerability analysis with the traditional linear probabilistic risk approach. This approach is named integrated fuzzy flood vulnerability assessment because it combines the watershed-based vulnerability framework with stream-based risk analysis. The Delphi technique and pressure-state-impact-response framework are introduced to objectively select evaluation criteria, and the fuzzy TOPSIS technique is proposed to address the uncertainty of weights to all criteria and crisp input data of all spatial units. ArcGIS is used to represent the spatial results to all criteria. This framework is applied to the south Han River basin in South Korea. As a result, the flood vulnerability ranking was derived and vulnerability characteristics of all spatial units were compared. This framework can be used to conduct a prefeasibility study for flood mitigation projects when various stakeholders should be included.
Highlights
GIS applications, Delphi techniques and fuzzy TOPSIS method were used in this integrated fuzzy flood vulnerability assessment (IFFVA)
Social and environmental criteria related to flood risks are often neglected (Meyer et al, 2009; Sebald, 2010)
Most studies have focused on hydrologic aspects and economic damages that can be measured in terms of monetary and commensurable units
Summary
After term “vulnerability” can mbDeancayotmadimsScounyslssyiotuennsmdaensrsdtodoisdptuhtaets,vtuhlewhen various stakeholders should be included. Vulnerability refers to the extent to which changes could harm a system, or to which a community can be affected by the impact of a hazard This parametric approach aims to use rveualdnielryabavilaitiylaobfleadnaatareoaOf(iBcnafeolircamanaettiSoanl.c,to2ie0b1nu3icl)d.ea picture of the Published by Copernicus Publications on behalf of the European Geosciences Union. For the above reasons, Meyer et al (2009) and Scheuer et al (2011) used a different, wider concept of vulnerability that included both the spatial hazard vulnerability multi-criteria analysis (MCA) and probabilistic inundated risk analysis. This study develops a new procedure of the multicriteria spatial flood vulnerability analysis that combines Delphi method with fuzzy MCDM technique.
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