Development and Implementation of an Assessment Framework for Coastal Flood Vulnerability

Abstract

In Korea, severe flood damages caused by regional and climatic effects characterized by the peninsular topography. This study was motivated by limitations found in the widely used flood vulnerability assessment frameworks of the OECD PSR model and the IPCC vulnerability concept. These limitations included ambiguity in the selection of proxy variables by classification of assessment components, quantification issues for some variables, and negative elasticity of countermeasures to vulnerability. To address these limitations, this study has developed a new assessment framework that comprises a flood cause indicator (FI), a potential target indicator (PI), and a damage history indicator (DI). Using these indicators, an assessment of the flood vulnerability was performed for Korea's 73 coastal administrative districts. A coastal flood vulnerability index (CFVI) was calculated by a multiplicative utility function that aggregates the three assessment components from nine selected proxy variables. The calculated CFVI values indicated that the flood vulnerability is relatively high for the major coastal cities, where the values of all three assessment components together are larger. The new flood vulnerability assessment framework proposed in this study is expected to be helpful in coastal flood vulnerability assessment and mitigation decision making. 1. 서 론 최근의 연안지역과 관련하여 홍수재해 발생이 크게 늘고 있으며, 연안의 지역적인 특성에 의하여 동일한 강우조건에 서도 홍수피해가 크게 발생하는 경향이 있다. 반면에 현재 주요하천을 중심으로 한 홍수저감 대책은 국가적인 차원에 서 대비가 비교적 잘 수행되고 있으나, 연안도시들의 특성을 고려한 홍수관리에 관련된 연구는 널리 수행되지 못하고 ­ 291 ­