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Title of Journal: KSCE J Civ Eng

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Abbravation: KSCE Journal of Civil Engineering

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Korean Society of Civil Engineers

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DOI

10.1016/0255-2701(84)87002-6

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1976-3808

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Integrated flood risk analysis in a changing clima

Authors: SunKwon Yoon JongSuk Kim YoungIl Moon
Publish Date: 2014/05/20
Volume: 18, Issue: 5, Pages: 1563-1571
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Abstract

This research performed a case study to develop an integrated Flood Risk Index FRI considering hydrologic socioeconomic and ecological components to assess watershedbased flood hazards and vulnerability in the Korean Han River Basin where flood disasters frequently occur We used fifteen indicators which were standardized weighted and classified to create an FRI map Five categories of flood risk were distinguished “very high” “high” “medium” “low” and “very low” The results in ternary diagrams illustrating the relative importance of the three components show that urban areas in the Korean Han River Basin have experienced a decrease of 10 in terms of the hydrologic component However the socioeconomic and ecological components have increased by 32 and 44 respectively In rural areas an increase of 48 was found in the hydrologic component alongside decreases in the socioeconomic 16 and ecological 22 factors In addition the FRI map shows that 2002 of the total area of the Han River Basin is classified as having “very high” or “high” flood risk the size of this highrisk zone has increased significantly by 712 since 1990 Despite the relatively small sample size and lack of data the results presented here provide a quantified assessment of Han River flood risk combined with an integrated view of risk assessment and management for stakeholders and decisionmakers

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