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Application of Fuzzy TOPSIS to Flood Hazard Mapping for Levee Failure

Forecast and Control Division of Nakdong River Flood Control Office, Ministry of Environment, Pusan 49300, Korea
National Civil Defense and Disaster Management Training Institute, Ministry of the Interior and Safety, Cheonan 31068, Korea
Department of Civil Engineering, Kyungpook National University, Daegu 41566, Korea
Author to whom correspondence should be addressed.
Water 2019, 11(3), 592;
Received: 31 January 2019 / Revised: 18 March 2019 / Accepted: 18 March 2019 / Published: 21 March 2019
(This article belongs to the Special Issue Flash Floods in Urban Areas)
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This paper proposes a new approach to consider the uncertainties for constructing flood hazard maps for levee failure. The flood depth, velocity, and arrival time were estimated by the 2-Dimensional model and were considered as flood indices for flood hazard mapping. Each flood index predicted from the 2-D flood analysis based on several scenarios was fuzzified to reflect the uncertainties of the indices. The fuzzified flood indices were integrated using the Fuzzy TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution), resulting in a single graded flood hazard map. This methodology was applied to the Gam river in South Korea and confirmed that the Fuzzy MCDM (Multiple Criteria Decision Making) technique can be used to produce flood hazard maps. The flood hazard map produced in this study compared with the current flood hazard map of MOLIT (Ministry of Land, Infrastructure and Transports). This study found that the proposed methodology was more advantageous than the current methods with regard to the accuracy and grading of the flood areas, as well as in regard to an integrated single map. This report is expected to be expand upon other floods, including dam failure and urban flooding. View Full-Text
Keywords: flood hazard map; 1-D and 2-D analyses; Fuzzy TOPSIS method; levee failure flood hazard map; 1-D and 2-D analyses; Fuzzy TOPSIS method; levee failure

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Kim, T.H.; Kim, B.; Han, K.-Y. Application of Fuzzy TOPSIS to Flood Hazard Mapping for Levee Failure. Water 2019, 11, 592.

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