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J. Korean Soc. Hazard Mitig. > Volume 18(7); 2018 > Article
하천방재
Journal of the Korean Society of Hazard Mitigation 2018;18(7):545-553.
DOI: https://doi.org/10.9798/KOSHAM.2018.18.7.545    Published online December 31, 2018.
AHP를 활용한 하천 합류부 재해위험성 평가기법 개발
이삼희1, 윤현철2
1정회원, 한국건설기술연구원 국토보전연구본부 선임연구위원
2정회원, 국립재난안전연구원 방재연구실 시설연구사
Development of Disaster Risk Assessment Method in River Confluence Using AHP
SamHee Lee1, HyeonCheol Yoon2
1Member, Senior Research Fellow, Department of Land, Water and Environment Research, KICT
2Member, Researcher, Disaster Prevention Research Div., NDMI
Corresponding author:  HyeonCheol Yoon, Tel: +82-52-928-8173, Fax: +82-52-928-8009, 
Email: hcyoon82@korea.kr
Received: 5 November 2018   • Revised: 6 November 2018   • Accepted: 19 November 2018
Abstract
A river confluence has the complicated characteristics of flow because of various geographical features. Therefore disaster occurrence possibility in the confluence of two rivers is relatively high compared to the general zone of river channel. In the this study, 3,836 rivers(62 national rivers and 3,774 local rivers) are investigated by using the cad-data(river survey maps), satellite and/or topographic maps to develop disaster risk assessment method for river confluence in macro view. The disaster vulnerable factors(sand bar, drop structure, bridge peer, road on channel and etc.) and the channel characteristics(confluence angle, channel bend, channel linear and etc.) which dominate river confluence are deduced with investigation results. Also, the disaster risk assessment method is developed by using AHP(Analytic Hierarch Process). Based on this method, 73 high risky river confluences are proposed and prioritized.
Key Words: River Confluence, Channel Characteristic, Disaster Risk Assessment, AHP
요지
하천 합류부는 다양한 지질·지형의 영향으로 흐름 특성이 복잡하고 하상변동이 활발해 재해발생 가능성이 상대적으로 높다. 하천 합류부에 대한 재해위험성 평가 기법을 개발하기 위해 거시적 관점에서 총 3,836개(국가하천 62개, 지방하천 3,774개) 하천을 대상으로 도상조사를 실시하였다. 조사 결과를 바탕으로 합류부를 지배하는 지류 유입각, 만곡부, 하도선형 등의 하도특성과 사주, 합류부 낙차공, 교각 및 하상도로 등의 재해취약요소를 도출하였다. 이를 바탕으로 AHP(Analytic Hierarch Process)를 활용한 합류부 재해위험성 평가 기법을 개발하였으며, 조사 대상 구간에서 우선순위를 매긴 최우선 정비대상 73개소를 제시하였다.
핵심용어: 하천 합류부, 하도특성, 재해위험성 평가, AHP


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