The Monitoring of Topography Change in the Estuary of the Korean East Coast Using LiDAR

Kim, S.; Lee, H.; Jun, K., and Jun, B.-H., 2018. The monitoring of topography change in the estuary of the Korean east coast using LiDAR. 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. 46–50. Coconut Creek (Florida), ISSN 0749-0208. Recently, due to abnormal climates caused by climate changes, important shorelines found in the east coast of Korea are facing many topographical changes. Especially within the estuary regions that meet the rivers, complex phenomenon due to artificial causes like topographical and stream character changes are occurring. In this study, GPS with RTK (Real Time Kinematic) application and above ground LiDAR (Light Detection And Ranging) were used to observe and the changing typography by season of Gagok River estuary region located in the east coast of Korea. Also the changes in water discharge from the Gagok River were measured in order to analyze what sort of influence it had on the changing topography of the estuary's beach dunes. Investigations were made on topographical changes that happen such as changes in the width of the beach profile due to the installation of artificial structure on the estuary region. The results indicate that the closing of the estuary occurs depending on the season. Moreover, the variance of the beach dunes' volume was investigated through the LiDAR measurement results.