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http://dx.doi.org/10.3741/JKWRA.2022.55.2.135

Efficient method for acquirement of geospatial information using drone equipment in stream  

Lee, Jong-Seok (Department of Civil & Environmental Engineering, Hanbat National University)
Kim, Si-Chul (Department of Civil Engineering, Hanbat National University)
Publication Information
Journal of Korea Water Resources Association / v.55, no.2, 2022 , pp. 135-145 More about this Journal
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.
Keywords
Drone utilization; D-LiDAR; Geospatial information; Efficient method; Design flood discharge;
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