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J. Korean Soc. Hazard Mitig. > Volume 24(4); 2024 > Article
환경방재
Journal of the Korean Society of Hazard Mitigation 2024;24(4):267-279.
DOI: https://doi.org/10.9798/KOSHAM.2024.24.4.267    Published online August 29, 2024.
네트워크 분석을 통한 대피소까지의 이동거리, 대피시간 및 대피가능 범위 산정
이경근1, 김태형2, 정혁상3, 김병현4
1정회원, 한국농어촌공사 경북지역본부 영주봉화지사 과장
2정회원, 환경부 낙동강홍수통제소 예보통제과 연구사
3동양대학교 철도건설안전공학과 교수
4정회원, 경북대학교 토목공학과 교수
Estimating Evacuation Distance, Time, and Range to Shelters Through Network Analysis
Kyeongkeun Lee1, Tae-Hyung Kim2, Hyuk-Sang Jung3, Byunghyun Kim4
1Member, Manager, Yeongju-bonghwa District Office, Gyeongbuk Regional Headquarters, Korea Rural Community Corporation
2Member, Research Officer, Forecast and Control Division, Nakdong River Flood Control Office, Ministry of Environment
3Professor, Department of Railroad Construction and Safety Engineering, Dongyang University
4Member, Professor, Department of Civil Engineering, Kyungpook National University
Corresponding author:  Byunghyun Kim, Tel: +82-53-950-7819, Fax: +82-53-950-6564, 
Email: bhkimc@knu.ac.kr
Received: 25 July 2024   • Revised: 25 July 2024   • Accepted: 29 July 2024
Abstract
This study employed the QGIS spatial information analysis tool to conduct network analyses through the O-D Matrix and ISO-Area methods. These network analyses calculated travel distances and evacuation times from flooded residential buildings (evacuation start points) to shelters (evacuation end points) in the event of a reservoir collapse. Feasibility of evacuation from each residential building was assessed by comparing the evacuation time with the initial flood wave arrival and peak flood level occurrence times. Walking speeds were set based on population characteristics: 1 m/s for children and the elderly and 2 m/s for adults (fast walking). Using a walking speed of 1 m/s, evacuation zones were established at 300-meter intervals, representing a 5-minute walking distance for each shelter. The resident population per building was estimated to determine the number of evacuees, and shelter capacity was calculated based on the required space per person.
Key Words: Network Analysis, QGIS, Evacuation Time, Evacuation Range, Optimal Shelter
요지
본 연구에서는 공간정보 분석 도구인 QGIS를 활용하여 O-D Matrix Analysis 및 ISO-Area Analysis의 네트워크 분석을 수행하였다. 이 2가지의 네트워크 분석을 활용하여 저수지 붕괴 시 침수 주거건축물(대피시점)로부터 대피소(대피종점)까지의 이동거리 및 대피시간을 산정하였다. 각각의 주거건축물에서 최초홍수파 도달시간 및 최고홍수위 발생시간과 대피시간을 비교하여 주거건축물로부터의 대피가능 여부를 판별하였다. 인구 특성을 고려하여 보행속도를 어린이 및 노약자 1 m/s, 성인(빠른걸음) 2 m/s로 분류하였으며, 보행속도(1 m/s)를 기준으로 5분 거리인 300 m 단위로 대피소별 수용영역을 설정하였다. 주거건축물 당 거주인구를 산정하여 대피인구를 계산하고 대피소 1인당 소요 면적으로 대피소의 수용인구를 산정하였다.
핵심용어: 네트워크 분석, QGIS, 대피 시간, 대피 범위, 최적대피소


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