Comparative analysis of flood control safety assessment methods using flood risk maps: a case study for the Yeongsan-Seomjin River basins

Gyu Eo; Seonuk Baek; Hung Soo Kim

doi:10.3741/JKWRA.2025.58.3.251

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Research Article

Comparative analysis of flood control safety assessment methods using flood risk maps: a case study for the Yeongsan-Seomjin River basins 홍수위험지도를 활용한 치수안전도 분석 및 평가 - 영산강ㆍ섬진강 유역을 중심으로-

31 March 2025. pp. 251-262

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Abstract

The frequency and magnitude of natural disasters have been increasing due to climate change. Therefore, we have established the Long Term Comprehensive Plan for National Water Resources (CP-NWR) in Korea to develop a robust and safe flood management strategy. This plan incorporates the Potential Flood Damage (PFD) assessment, which is used to analyze high-risk areas and develop appropriate safety measures. However, the limitations of the PFD assessment have been identified, leading to numerous studies aimed at addressing these issues. Most previous studies have focused on modifying existing indicators of PFD or introducing new indicators to improve assessment accuracy. In contrast, Prior research proposed an improved methodology to resolve the identified issues and highlighted several limitations of the conventional assessment approach, such as a rigid and river-centric evaluation framework, insufficient database construction for diverse indicators, and overestimation or underestimation caused by the use of large-scale spatial units. To overcome the limitations, we developed a new assessment method, called ‘Flood Control Safety Assessment Tool’ using Flood Risk Map based on the previous study of prior research . In particular, we improved the method for determination of flood management level and the criteria for identifying vulnerable area in flood, which was not adequately addressed in the previous research. The developed method in this study suggests more realistic methodology than the previous work. Therefore, the results derived from the developed method in this study are expected to contribute to a more realistic evaluation framework for flood risk and facilitate the development of a systematic and effective flood management strategy tailored to South Korea's unique conditions.

Keywords

PFD

Flood management level

Flood control safety assessment tool

Flood risk map

전 세계적인 기후재앙으로 인해 자연재해의 발생 빈도와 규모가 증가하고 있다. 이에 우리나라는 안전한 치수계획을 세우기 위해 수자원장기종합계획을 수립하고 있는데 특히, 홍수피해잠재능(Potential Flood Damage, PFD) 평가를 통해 위험 지역을 분석하고, 이에 따른 안전한 대책을 수립하도록 하고 있다. 하지만, PFD의 문제점이 제기되면서 다양한 연구들을 진행하고 있는데 대부분 PFD 인자를 수정·보완하거나 인자를 새로 추가하는 형태로 수행되어 왔다. 반면, 기존 선행연구에서는 평가 방식의 문제점을 해결하기 위해 개선된 방법론을 제시하였다. 즉, 획일적이고 하천 중심적인 평가 방식, 다양한 인자에 대한 데이터베이스 구축 미비, 광역 평가 공간 단위 사용으로 인한 과대 또는 과소 평가 등의 문제점을 지적하였으며, 이를 보완하기 위한 새로운 평가 방법을 개발하였다. 본 연구에서는 선행연구의 방법론을 기반으로 추가적인 한계점을 제시하고 이를 보완할 수 있는 방안을 제안하고자 한다. 특히, 선행연구에서도 미흡하게 다루어진 홍수관리 수준 설정과 취약지구 선정 기준 등의 문제점을 보완하여 보다 현실적인 평가 방안을 마련하고자 한다. 본 연구의 결과는 우리나라 치수안전도 평가 및 체계적인 치수 전략 수립에 기여할 것으로 기대된다.

키워드

PFD

홍수관리수준

치수안전도 평가 방법

홍수위험지도

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 58
No :3
Pages :251-262
Received Date : 2024-12-18
Revised Date : 2025-02-03
Accepted Date : 2025-02-04
DOI :https://doi.org/10.3741/JKWRA.2025.58.3.251

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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