Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
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Analysis of Slope Hazard-Triggering Rainfall and Geological Characteristics in 2011 and 2012

2011년과 2012년의 사면재해 유발강우 및 지질특성분석

  • Hwang, Hyungun (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Lee, Seung Woo (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Kim, Gihong (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Choi, ByoungKoo (Research Center for River Flow Impingement and Debris Flow) ;
  • Yune, Chan-Young (Department of Civil Engineering, Gangneung-Wonju National University)
  • 황현근 (강릉원주대학교 토목공학과) ;
  • 이승우 (강릉원주대학교 토목공학과) ;
  • 김기홍 (강릉원주대학교 토목공학과) ;
  • 최병구 (수충부 및 토석류 방재기술 연구단) ;
  • 윤찬영 (강릉원주대학교 토목공학과)
  • Received : 2013.07.24
  • Accepted : 2013.10.31
  • Published : 2013.12.31
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Abstract

There has been many slope hazards due to heavy rainfall and typhoon in Korea. Recently, typhoon 'Meari', 'Muifa' and heavy rainfall events in 2011, and typhoon 'Sanba' in 2012 caused many slope disasters throught Korea, respectively. In this study, field investigation was conducted for the sites where the exact time and location of slope disaster were confirmed in 2011 and 2012 throughout Korea. Rainfall and geologic data for a total of 134 sites were collected as database and analyzed in various aspects. Analysis result showed that debris flow was the majority in numbers compared to the other types of slope hazard such as natural slope failure and artificial slope failure. Many slope hazards were occurred below the warning criteria of hourly rainfall. In addition the rainfall characteristics both in short term and long term period were critical for occurring the slope hazard. Result also confirm that metamorphic rocks were vulnerable to slope hazard.

우리나라는 장마와 태풍으로 인한 많은 사면재해가 발생하고 있다. 특히 2011년에는 태풍 '메아리', '무이파'와 7월에 집중적으로 내린 호우로 많은 사면재해가 발생하였으며, 2012년도에는 한반도를 지나간 5개의 태풍 중 '산바'로 인하여 많은 사면재해가 발생하였다. 본 연구에서는 2011년과 2012년에 발생한 사면재해에 대하여 발생시간과 장소가 확인된 지역에 대한 현장조사를 실시하였다. 총 134개소의 전국 재해발생 현장에 대하여 강우자료와 지질자료 등을 수집하여 데이터베이스를 구축하고 다양한 측면에서 분석을 수행하였다. 분석결과 토석류, 자연사면붕괴, 인공사면붕괴 중 토석류 재해가 가장 많았으며, 시간강우의 경우에는 산사태 예보 기준에 미치지 못한 강우에서도 재해 발생이 많은 것으로 나타났다. 또한 사면재해 발생에 대하여 단기 강우뿐만 아니라 장기강우의 영향도 있는 것으로 분석되었으며, 변성암 계열의 지질이 사면재해에 취약한 것으로 나타났다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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Cited by

  1. Risk Assessment of 2011 Debris Flow Hazard Area in Yongin City vol.15, pp.2, 2015, https://doi.org/10.9798/KOSHAM.2015.15.2.165