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Spatially-explicit assessment of flood risk caused by climate change in South Korea

  • Research Paper
  • Water Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Identifying spatially-explicit risk is essential for efficient flood management with limited resources and budgets. We investigated national-scale relative flood risk for 139 sub-basins in South Korea under current and future climate conditions. A non-parametric index method was employed to calculate relative flood risk based on a sensitivity index, an exposure index, and an adaptive capacity index for each sub-basin. A dynamically downscaled climate simulation based on the A2 Greenhouse Gas (GHG) emission scenario, provided by the Korean Meteorological Research Institute (METRI), was used to examine possible change in flood risk. The estimated flood risk generally agreed with historical flood damage. The highly vulnerable sub-basins had high exposure indices, reflecting frequent heavy rainfall, as well as high sensitivity indices due to dense population at low elevation. Although rainfall intensity and frequency is likely to increase under the A2 GHG emission scenario, the spatial pattern of relative flood risk did not change remarkably. Our results indicate that reducing flood sensitivity levels and enhancing the adaptive capacity in vulnerable regions will be critical aspects of climate change preparation in South Korea.

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Authors and Affiliations

  1. Institute for Sustainable Solutions, Dept. of Geography, Portland State University, Portland, OR, 97201-0751, USA

    Il-Won Jung & Heejun Chang

  2. Dept. of Civil & Environmental Engineering, Sejong University, Seoul, 143-747, Korea

    Deg-Hyo Bae

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  1. Il-Won Jung
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Correspondence to Il-Won Jung.

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Jung, IW., Chang, H. & Bae, DH. Spatially-explicit assessment of flood risk caused by climate change in South Korea. KSCE J Civ Eng 17, 233–243 (2013). https://doi.org/10.1007/s12205-013-1609-x

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