Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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A study on Reliability Analysis for Prediction Technology of Water Content in the Ground using Hyperspectral Informations

초분광정보를 이용한 지반의 함수비 예측 기술의 신뢰성 분석 연구

  • Lee, Kicheol (UCI Tech Co. Ltd.) ;
  • Ahn, Heechul (Institute of Technology Research and Development, Korea Engineering & Construction) ;
  • Park, Jeong-Jun (Incheon Disaster Prevention Research Center, Incheon National University) ;
  • Cho, Jinwoo (Construction Automation Research Center, Korea Institute of Civil Engineering and Building Technology) ;
  • You, Seung-Kyong (Dept. of Civil Engineering, Myongji College) ;
  • Hong, Gigwon (Dept. of Civil and Disaster Prevention Engineering, Halla University)
  • Received : 2021.11.30
  • Accepted : 2021.12.24
  • Published : 2021.12.31
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Abstract

In this study, an laboratory experiment was performed for prediction technology of water content in the ground using hyperspectral information. And the spectral reflectance with a specific wavelength band was obtained according to the fine and water content. Through it, the spectral information was normalized with the spectral index of the existing literature, and the relationship with the fine and water contents and the reliability of the prediction technology were analyzed. As a result of analysis, the spectral reflectance is decreased when the water and fine contents are increased under the high water contents. In addition, the reliability of prediction technology of water content was evaluated by examining 7 different spectral index calculation methods. Among them, DVI showed relatively high prediction reliability and was superior to other calculation methods in terms of sensitivity.

본 연구에서는 초분광정보를 이용한 지반의 함수비 예측 기술을 위해 실내 분광정보 실험을 수행하여 세립분 및 함수비 조건에 따라 특정 파장대역에 따른 분광반사율을 획득하였다. 이를 토대로 기존 문헌의 스펙트럼 지수에 따라 분광정보를 정규화하고, 세립분 및 함수비 조건과의 상관관계 및 예측 기술의 신뢰성을 분석하였다. 상관관계 분석 결과 함수비가 증가할수록 분광반사율은 낮아지며 세립분 함유율이 증가할수록 높은 함수비 조건의 분광반사율은 감소율이 크게 발생하였다. 또한 7가지의 스펙트럼 지수 산정방법을 고찰하여 함수비 예측에 대한 신뢰도를 평가하였다. 이 중 DVI가 비교적 높은 예측 신뢰도를 보이며, 민감도 부분에서도 다른 산정 방법에 비해 우수하여 지반의 함수비 예측 기술 적용에 있어 적합한 스펙트럼 지수인 것으로 판단하였다.

Keywords

Acknowledgement

This research was supported by the Ministry of Land, Infrastructure and Transport of the Korean government (Project Number: 21SMIP-A157182-02).

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