Yun, K.; Lee, C.K.; He, G., and Park, B.W., 2021. Monitoring of shoreline change at Chollipo Beach in South Korea. In: Lee, J.L.; Suh, K.-S.; Lee, B.; Shin, S., and Lee, J. (eds.), Crisis and Integrated Management for Coastal and Marine Safety. Journal of Coastal Research, Special Issue No. 114, pp. 469–473. Coconut Creek (Florida), ISSN 0749-0208.
Natural coastal shorelines change constantly due to various phenomena such as tides, waves, and weather. Shoreline change data are important for coastal management, which deals with issues including coastal erosion and sedimentation trends and setbacks. It has been reported that Chollipo Beach in Taeangun, Chungnamdo, in the western part of South Korea, has been progressively sedimented over the past years. In this study, a photogrammetric analysis was conducted to determine the characteristics of the shoreline of Chollipo Beach over twenty years. In the analysis, photogrammetric aerial triangulation using old digital aerial images from 1986 and unmanned aerial vehicle images from 2020 were considered. In addition, network GPS surveying was performed for the acquisition of ground control points in the bundle adjustments stage. Finally, a digital surface model and mosaicked orthoimages were generated. For the analysis, contour lines and beach profiles were extracted. The analysis results show that over 25 years, the shorelines moved towards the sea by a maximum distance of 100 m and deposited sands reached a height of 1.84 m.