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Analysis of Slope Hazard Triggering Factors through Field Investigation in Korea Over the Past Four Years

최근 4년간 국내 사면재해 현장조사를 통한 유발인자 분석

Kyoung-Jea Jun1
,
Chan-Young Yune2*
전 경재1
,
윤 찬영2*
1Ph. D. Candidate, Dept. of Civil Eng., Gangneung-Wonju National Univ.
2Associate Prof., Dept. of Civil Eng., Gangneung-Wonju National Univ.
1강릉원주대학교 토목공학과 박사수료
2강릉원주대학교 토목공학과 부교수
*교신저자. *Corresponding Author. 
31 May 2015. pp. 47-58
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Abstract

Triggering rainfall and geologic conditions with the state of slope hazard were investigated based on the field investigation and collected data on the slope hazard during the period between 2011 and 2014 in Korea. Analysis results showed that most of slope hazards occurred in metamorphic rock and debris flow was the most frequent type of slope hazard. Slope hazard increased when the higher monthly mean rainfall was recorded. However, most of slope hazard occurred when certain time elapsed after the moment of maximum hourly rainfall. Finally, more than one month of long-term rainfall was shown to be related to the frequency of slope hazard in the period.

Keywords
Slope hazard
Debris flow
Rainfall
Geologic condition

본 연구에서는 2011년에서 2014년까지 최근 4년간 국내에서 발생한 사면재해에 대한 현장조사를 수행하고 재해 발생지의 지질 및 강우자료를 수집하여 국내 사면재해 현황 및 유발강우와 지질특성을 분석하였다. 분석 결과, 변성암지역에서 가장 많은 사면재해가 발생하였으며, 사면재해 중에서는 토석류가 가장 많이 발생한 것으로 나타났다. 월평균 강우량이 높을 때 사면재해도 증가하는 것으로 나타났으나, 대부분의 사면재해는 최대시간강우량이 내린 이 후 일정한 시간이 지나고 발생한 것으로 나타났다. 또한, 전반적인 사면재해 발생횟수는 1개월 이상의 장기강우와 관련이 있는 것으로 분석되었다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 31
  • No :5
  • Pages :47-58
  • Received Date : 2015-02-24
  • Revised Date : 2015-04-15
  • Accepted Date : 2015-04-20
  • DOI :https://doi.org/10.7843/kgs.2015.31.5.47
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