Jun, K.; Jun, B.-H.; Lee, H.; Kim, S., and Tak, W., 2018. The study of utilization and precision based on the comparison and analysis of drone-based coastal hazard data and its application in the ocean environment. In: Shim, J.-S.; Chun, I., and Lim, H.S. (eds.), Proceedings from the International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal of Coastal Research, Special Issue No. 85, pp. 811–815. Coconut Creek (Florida), ISSN 0749-0208.

As more economic activities are developing along the coast, many studies are performed within the area concerning biological, social, economic factors closely linked to human activities. As coastal hazards occur in various categories, consistent monitoring would establish effective countermeasures and management of the coastal hazard region. Many surveys concerning seashore disasters exist already, like the bathymetric survey, beach profile survey, and shoreline survey. However, some of their disadvantages include high price, the use of equipment and many people, and time. The Gagok River, located in the Eastern coast of Korea, was chosen as it has many problems like its collapse of the coastal erosion and seaside road. Coastline monitoring and coastal survey were implemented using the drone and terrestrial LiDAR. For many years, the surveyed data were used to analyse the shoreline erosion problems and coastal estuary topographic changes. Changes in the shoreline were confirmed to occur every year at the designated area of study. The geomorphological state of the coastal estuary caused deposition, thus both the elevation rose and beach area increased consistently. Monitoring of these changes was consistent; upon analysis of all these data, this provided useful information for the construction of coastal structures and coastal protection facilities. At the end, the analysed data provided by both terrestrial LiDAR and the drone were compared. The survey data provided by the drone during the monitoring were validated to show higher utilization and precision.