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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 13, issue 5 | Copyright
Nat. Hazards Earth Syst. Sci., 13, 1293-1312, 2013
https://doi.org/10.5194/nhess-13-1293-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 22 May 2013

Research article | 22 May 2013

Integrated multi-criteria flood vulnerability approach using fuzzy TOPSIS and Delphi technique

G. Lee1, K.-S. Jun1, and E.-S. Chung2 G. Lee et al.
  • 1Department of Civil and Environmental Engineering, Sungkyunkwan University, Suwon, Republic of Korea
  • 2School of Civil Engineering, Seoul National University of Science and Technology, Seoul, Republic of Korea

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.

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