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Research Article

Monitoring Landcreep Using Terrestrial LiDAR and UAVs

지상라이다와 드론을 이용한 땅밀림 모니터링 연구

Jong-Tae Kim1
,
Jung-Hyun Kim2
,
Chang-Hun Lee2
,
Seong-Cheol Park3
,
Chang-Ju Lee4
,
Gyo-Cheol Jeong5*
김 종태1
,
김 정현2
,
이 창훈2
,
박 성철3
,
이 창주4
,
정 교철5*
1CEO, Nature and Tech Inc.
2Senior Researcher, Nature and Tech Inc.
3Senior Researcher, FITI Testing & Research Institute
4CEO, Dae Young Construction Inc.
5Professor, Department of Earth and Environmental Sciences, Andong National University
1주식회사 자연과기술 대표이사
2주식회사 자연과기술 선임연구원
3FITI시험연구원 선임연구원
4주식회사 대영건설 대표이사
5안동대학교 지구환경과학과 교수
*Corresponding Author
31 March 2023. pp. 27-37
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Abstract

Assessing landcreep requires long-term monitoring, because cracks and steps develop over long periods. However, long-term monitoring using wire extensometers and inclinometers is inefficient in terms of cost and management. Therefore, this study selected an area with active landcreep and evaluated the feasibility of monitoring it using imagesing from terrestrial LiDAR and drones. The results were compared with minute-by-minute data measured in the field using a wire extensometer. The comparison identified subtle differences in the accuracy of the two sets of results, but monitoring using terrestrial LiDAR and drones did generate values similar to the wire extensometer. This demonstrates the potential of basic monitoring using terrestrial LiDAR and drones, although minute-by-minute field measurements are required for analyzing and predicting landcreep. In the future, precise monitoring using images will be feasible after verifying image analysis at various levels and accumulating data considering climate and accuracy.

Keywords
landcreep
terrestrial LiDAR
UAV
wire extensometer
monitoring

땅밀림은 균열 및 단차가 오랜시간에 걸쳐 발생하기 때문에 장기적인 모니터링이 반드시 필요하다. 그러나 사면변위계, 경사계 등을 이용한 장기모니터링은 비용 및 관리 차원에서 비효율적이다. 따라서 본 연구에서는 땅밀림이 진행 중인 지역을 테스트베드로 선정하고 영상을 이용한 모니터링 가능성을 평가하였다. 이를 위해 지상라이다와 드론을 이용하여 땅밀림 모니터링을 실시하고 계측자료와 비교하였다. 현장 계측은 사면변위계를 설치하여 분단위 측정을 실시하였다. 분석값의 비교결과 정확도에 따라 미세한 차이는 있지만 지상라이다와 드론을 이용한 모니터링에서도 사면변위계와 유사한 값을 얻을 수 있었다. 이는 땅밀림의 정밀분석 및 예측을 위해서는 분단위의 현장계측이 필요하지만 지상라이다 및 드론을 활용한 기초 모니터링의 가능성을 보여준다. 향후 다양한 차원에서 영상분석에 대한 검증이 이루어지고 기후, 정확도 등을 고려한 데이터가 누적되면 영상을 이용한 정밀 모니터링도 가능할 것으로 판단된다.

키워드
땅밀림
지상라이다
드론
사면변위계
모니터링
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 33
  • No :1
  • Pages :27-37
  • Received Date : 2023-02-07
  • Revised Date : 2023-03-27
  • Accepted Date : 2023-03-28
  • DOI :https://doi.org/10.9720/kseg.2023.1.027
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