High-Resolution Bathymetry in Shallow Waters off the Southern Coast of Korea from Satellite Altimetry and Remote Sensed Imagery

Abstract

Kim, K.B. and Yun, H.S., 2021. High-resolution bathymetry in shallow waters off the southern coast of Korea from satellite altimetry and remote sensed imagery. 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. 390–394. Coconut Creek (Florida), ISSN 0749-0208. Bathymetry in shallow waters off coastal areas has been measured using conventional methods such as with single-beam and multi-beam echo-sounders installed on the ship. However, shipborne depth data are spatially limited and unevenly distributed over shallow waters off coastal areas. In this study, various methods that use satellite altimetry-derived gravity anomalies and high-resolution remote sensed imagery were explored for the recovery of high-resolution bathymetry data over shallow waters off Gwangyang Bay between Yeosu Peninsula and Namhae Island on the South Sea of Korea. Estimated high-resolution bathymetry data from satellite altimetry-derived gravity anomalies and remote sensed imagery were compared with shipborne depth measurements to validate their accuracy in shallow waters. This study concluded that bathymetry data estimated with the gravity-geologic method (GGM) in shallow waters are better than those predicted by Sentinel-2 imagery.