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Development of Levee Safety Revaluation for Satellite Images

위성 이미지를 활용한 제방 안정성 평가 기법 개발

  • Bang, Young Jun (Dep. of Civil and Environmental Engineering, Hongik University) ;
  • Lee, Seung Oh (Dep. of Civil and Environmental Engineering, Hongik University)
  • 방영준 (홍익대학교 건설환경공학과) ;
  • 이승오 (홍익대학교 건설환경공학과)
  • Received : 2022.08.13
  • Accepted : 2022.09.13
  • Published : 2022.09.30

Abstract

Recently, the risk of water disasters are increasing due to climate change and the aging of river levees. Existing conventional river embankment inspections have many limitations due to the consumption of a lot of manpower and budget. Thus, it is necessary to establish a new monitoring and forecast/warning method for effective flood response. This study proposes the river levee health monitoring system by analyzing the relationship between river levee deformation and hydrological factors using Sentinel-1. The variance index calculated in this study was classified into 4 grades. And the levees collapse section was judged to be a high vulnerable point in which the variance rapidly increased based on the result of the rapid increase in soil moisture. In the future, it is expected that it will be possible to advance levee maintenance technology and improve national disaster management through the advancement of the existing levee management system and automated monitoring through the forensic method that combines remote technology.

최근 기후변화와 하천 제방의 노후화로 인해 수재해 위험이 가중되고 있으나 기존의 재래적인 하천 제방의 점검은 많은 인력과 예산 소모로 많은 한계점들이 존재하다. 이에 따라 효과적인 홍수 대응을 위해 새로운 모니터링과 예/경보 시스템 구축이 필요한 상황이다. 본 연구는 인공위성(Sentinel-1)을 이용한 하천 제방 변위 산출, 수문학적 요인과의 관계 분석 항목들을 결합한 하천 제방 건강상태 모니터링 방법을 제안한다. 본 연구에서 산정한 변동성 지수를 계산하여 4등급으로 구분하였고, 토양 수분의 급증한 결과를 토대로 제방 붕괴 구간이 변동성이 급증한 취약지점 상태로 판단하였다. 향후에는 원격 기술과 분석 항목들을 결합한 포렌식 기법을 통해 기존 제방관리 시스템의 고도화가 가능할 것으로 기대한다.

Keywords

Acknowledgement

본 결과물은 교육부의 재원으로 홍익대학교의 대학혁신지원사업(UROP)의 지원을 받아 연구되었으며, 자문을 주신 산업체 전문가 H2R 소속의 제갈선동 박사님께 감사드립니다.

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