Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Efficient method for acquirement of geospatial information using drone equipment in stream

드론을 이용한 하천공간정보 획득의 효율적 방안

  • Lee, Jong-Seok (Department of Civil & Environmental Engineering, Hanbat National University) ;
  • Kim, Si-Chul (Department of Civil Engineering, Hanbat National University)
  • 이종석 (한밭대학교 건설환경공학과) ;
  • 김시철 (한밭대학교 토목공학과)
  • Received : 2021.11.04
  • Accepted : 2021.12.29
  • Published : 2022.02.28
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Abstract

This study aims to verify the Drone utilization and the accuracy of the global navigation satellite system (GNSS), Drone RGB (Photogrammetry) (D-RGB), and Drone LiDAR (D-LiDAR) surveying performance in the downstream reaches of the local stream. The results of the measurement of Ground Control Point (GCP) and Check Point (CP) coordinates confirmed the excellence. This study was carried out by comparing GNSS, D-RGB, and D-LiDAR with the values which the hydraulic characteristics calculated using HEC-RAS model. The accuracy of three survey methods was compared in the area of the study which is the ownership station, to 6 GCP and 3 CP were installed. The comparison results showed that the D-LiDAR survey was excellent. The 100-year frequency design flood discharge was applied in the channel sections of the small stream. As a result of D-RGB surveying 2.30 m and D-LiDAR 1.80 m in the average bed elevation, and D-RGB surveying 4.73 m and D-LiDAR 4.25 m in the average flood condition. It is recommended that the performance of D-LiDAR surveying is efficient method and useful as the surveying technique of the geospatial information using the drone equipment in stream channel.

본 연구는 지방하천의 하류구간을 대상으로 위성항법시스템(GNSS)과 드론 RGB (D-RGB), 드론 LiDAR (D-LiDAR) 측량성과 비교를 통해 측량방법의 정확도와 수공 실무의 드론 실용화를 검증하고자 한다. 이를 위해 지상기준점(GCP)과 검사점(CP) 좌표 값 측량결과의 우수성을 확인하고 그 결과를 HEC-RAS 모형에 적용하여 수리특성을 분석하고자 한다. 본 연구는 소유역인 연구대상지역을 세 방법의 정확도 비교를 위해 6개 GCP와 3개 CP를 설치하고 측량오차의 정확도 평가를 수행함으로써 D-LiDAR 측량성과가 우수한 것을 확인하였다. 이들 방법에 의한 소하천 수로구간의 100년 빈도 계획 홍수량에서 평균 하상고의 D-RGB와 D-LiDAR 성과는 2.30 m, 1.80 m, 평균 홍수위 성과는 4.73 m, 4.25 m로 D-LiDAR 성과가 우수하였다. 따라서 소하천 수로구간의 지형공간정보 획득에 드론 장비를 이용한 측량기법으로 D-LiDAR 측량이 유용한 방법이며 효율적인 방안으로 추천한다.

Keywords

Acknowledgement

"이 논문은 2020년도 한밭대학교 교내학술연구비의 지원을 받았음"에 교신저자는 학교 당국에 감사를 드린다.

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