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Assessing flood hazard using flood marks and analytic hierarchy process approach: a case study for the 2013 flood event in Quang Nam, Vietnam

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Abstract

The production of flood hazard assessment maps is an important component of flood risk assessment. This study analyses flood hazard using flood mark data. The chosen case study is the 2013 flood event in Quang Nam, Vietnam. The impacts of this event included 17 deaths, 230 injuries, 91,739 flooded properties, 11,530 ha of submerged and damaged agricultural land, 85,080 animals killed and widespread damage to roads, canals, dykes and embankments. The flood mark data include flood depth and flood duration. Analytic hierarchy process method is used to assess the criteria and sub-criteria of the flood hazard. The weights of criteria and sub-criteria are generated based on the judgements of decision-makers using this method. This assessment is combined into a single map using weighted linear combination, integrated with GIS to produce a flood hazard map. Previous research has usually not considered flood duration in flood hazard assessment maps. This factor has a rather strong influence on the livelihood of local communities in Quang Nam, with most agricultural land within the floodplain. A more comprehensive flood hazard assessment mapping process, with the additional consideration of flood duration, can make a significant contribution to flood risk management activities in Vietnam.

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Source: the Quang Nam Provincial Committee

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Source: Chau et al. (2014b)

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Acknowledgements

We would like to thank the Quang Nam Provincial Steering Committee of Natural Disaster Prevention and Control and Search and Rescue for providing us with the invaluable data and to thank the officers in the committees at provincial, district and commune levels for sharing their own practices and experiences in flood risk management activities. We sincerely thank Professor Thomas L. Saaty for his kind reply emails with helpful comments and suggestions on our AHP model and format of AHP pairwise comparisons. Chinh Luu acknowledges the University of Newcastle International Postgraduate Research Scholarship for her research.

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Correspondence to Chinh Luu.

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Luu, C., Von Meding, J. & Kanjanabootra, S. Assessing flood hazard using flood marks and analytic hierarchy process approach: a case study for the 2013 flood event in Quang Nam, Vietnam. Nat Hazards 90, 1031–1050 (2018). https://doi.org/10.1007/s11069-017-3083-0

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  • DOI: https://doi.org/10.1007/s11069-017-3083-0

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