Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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A Study on the Reduction of Flooding in Oncheon-Cheon through the Connection between Oncheon-Cheon and Hoedong-Reservoir Considering GIS

GIS를 고려한 온천천-회동저수지 연계를 통한 온천천 침수 저감 방안에 관한 연구

  • Choo, Yeonmoon (Research Institute of Industrial Technology, Pusan National University) ;
  • Choe, Yeonwoong (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Choo, Taiho (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Jeon, Kunhak (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Jeon, Haesung (Research Institute of Industrial Technology, Pusan National University)
  • 추연문 (부산대학교 생산기술연구소) ;
  • 최연웅 (부산대학교 사회환경시스템공학과) ;
  • 추태호 (부산대학교 사회환경시스템공학과) ;
  • 전근학 (부산대학교 사회환경시스템공학과) ;
  • 전해성 (부산대학교 생산기술연구소)
  • Received : 2020.10.08
  • Accepted : 2020.12.31
  • Published : 2021.02.28
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Abstract

The average annual rainfall in Busan to increase, and in case of Oncheon-Chen in Busan, frequent flooding occurred frequently. The middle and lower reaches of the Oncheon-Chen are relatively flat and urban areas are developed. Therefore, due to the frequent flooding of rivers and the large flood damage, a method of effectively eliminating the flow rate of Oncheon-Chen in the event of heavy rain is needed. In this study, underground waterway was established in the east of Hoedong-Reservoir as a measure to reduce floods in hot springs and simulated with EPA-SWMM. The information needed to construct the basin was utilized by GIS. In middle part of the Suyeong-Gang, there is a Hoedong-Reservoir and a dam is installed and has better conditions than the Nakdong-Gang. It also analyzed the effect of the Oncheon-Chen flow through the underground waterway on the Suyeong-Gang when it was transferred to the Hoedong-Reservoir. It was analyzed that the flood reduction rate at the flood risk points set up in this study was reduced by 24.64% on average when the underground waterway was installed, and the inflow of the water into the Suyeong-Gang increased by 1% on average when the flow rate was excluded by the Suyeong-Gang.

부산지역의 연평균 강우량은 지속적으로 증가하고 있으며 부산광역시 소재 온천천의 경우는 자주 상습침수가 발생하였다. 온천천의 지형적 특징으로 중·하류부는 비교적 평탄하며 도심지가 발달하였다. 따라서 이상호우 시 하천 범람이 잦고 침수피해가 크기 때문에 이상호우 시 온천천의 유량을 효과적으로 배제할 방법이 필요하다. 본 연구에서는 온천천의 홍수저감 대책으로 동쪽에 위치한 회동저수지로 지하수로를 구축하였으며 EPA-SWMM으로 모의 분석하였다. 유역구성 시 필요한 정보들은 GIS를 활용하였다. 수영강 중류부에 회동저수지가 있으며 댐이 설치되어있다. 지하수로를 구축하여 온천천의 침수저감률을 분석하였으며 지하수로를 통한 온천천의 유량이 회동저수지로 넘어갔을 시 수영강에 미치는 영향도 분석하였다. 본 연구에서 설정한 침수위험지점에 대한 침수저감률은 지하수로를 설치하였을 때 평균적으로 24.64%가 저감되는 것으로 분석 되었으며 수영강으로 유량 배제 시 수영강에는 평균적으로 1% 유입량이 늘어났기 때문에 밀집한 도심지의 경우에 시민의 생명과 재산을 상당히 보호할 수 있을 것으로 판단되고 본 연구에서 제안하는 지하수로의 효용성이 있다고 사료된다.

Keywords

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