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J. Korean Soc. Hazard Mitig. > Volume 18(7); 2018 > Article
풍수해방재
Journal of the Korean Society of Hazard Mitigation 2018;18(7):535-543.
DOI: https://doi.org/10.9798/KOSHAM.2018.18.7.535    Published online December 31, 2018.
피해조사 자료를 활용한 단독주택 홍수피해 영향인자 평가
최천규1, 김경탁2, 김길호3, 심명필4
1정회원, 한국건설기술연구원 전임연구원
2정회원, 한국건설기술연구원 연구위원
3정회원, 한국건설기술연구원 수석연구원
4정회원, 인하대학교 사회인프라공학과 명예교수
Study on Influencing Factors of Flood Damage to Single Houses using Field Survey Data
Cheonkyu Choi1, Kyungtak Kim2, Gilho Kim3, Myungpil Shim4
1Member, Research Specialist, Korea Institute of Civil Engineering and Building Technology
2Member, Research Fellow, Korea Institute of Civil Engineering and Building Technology
3Member, Senior Resrarcher, Korea Institute of Civil Engineering and Building Technology
4Member, Honorary Professor, Department of Civil Engineering, Inha University
Corresponding author:  Kyungtak Kim, Tel: +82-31-910-0267, Fax: +82-31-910-0251, 
Email: ktkim1@kict.re.kr
Received: 26 September 2018   • Revised: 1 October 2018   • Accepted: 11 October 2018
Abstract
The damages to residential buildings caused by flood disasters vary depending on impact factors such as disaster intensity and resistance factors such as building material and emergency measures. However, the relationship between these factors and flood damages is yet to be investigated due to the lack of systematic post-disaster surveys. Therefore, we conducted a field survey focused on damaged single family houses and collected data about the factors influencing flood damages. The data was analyzed to evaluate the relationship between various influencing factors and flood damage by using correlation analysis, decision tree model, and random forest method. Through the analyses, the major factors influencing building structure damages were found to be the inundation depth and height of the entrance. Moreover, the inundation depth, debris, and flow velocity were identified as the major factors influencing the building content damages. In the future, it is necessary to explore ways to enhance the resilience of buildings and reduce the influence of major factors by establishing local flood mitigation measures.
Key Words: Flood Damages, Influencing Factors, Building Structure, Building Contents, Field Survey
요지
홍수재난으로 인한 주거건물의 피해는 재난과 관계되는 충격인자와 건물재료, 피해저감을 위한 조치 등과 같은 저항인자에 따라서 상이한 결과를 나타낸다. 이러한 인자들과 홍수피해와의 관계는 그 동안 체계적인 사후조사의 부재로 인해 규명된 사례가 거의 없었다. 이에 본 연구는 단독주택를 중심으로 피해지역을 대상으로 현장조사를 실시하여 홍수피해 영향인자에 대한 정보를 수집하였고, 이를 활용하여 홍수와 관계되는 다양한 영향인자와 홍수피해 결과와의 관계를 이변량 상관분석, 의사결정나무모형, 랜덤포레스트 기법을 사용하여 평가하였다. 분석결과, 단독주택 건물구조물 피해에 영향을 주는 주요 인자는 건물내 침수심과 출입구 높이로 평가되었고, 건물내용물의 피해에 영향을 주는 주요 인자는 건물내 침수심, 이송잡물, 유속으로 나타났다. 향후 건축물 유닛 레질리언스 강화, 국지적인 홍수피해 저감대책 수립 시 본 연구에서 밝힌 인자들의 영향력을 저감하는 방향으로 추진할 필요가 있다.
핵심용어: 홍수피해, 영향인자, 건물구조물, 건물내용물, 피해조사


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