Height Recomputation of the Korean Vertical Origin Point Using New Mean Sea Level of Incheon Bay

Kim, K.B.; Yun, H.S., and Kim, T. W., 2019. Height recomputation of the Korean vertical origin point using new mean sea level of Incheon Bay. In: Lee, J.L.; Yoon, J.-S.; Cho, W.C.; Muin, M., and Lee, J. (eds.), The 3rd International Water Safety Symposium. Journal of Coastal Research, Special Issue No. 91, pp. 396-400. Coconut Creek (Florida), ISSN 0749-0208. The mean sea level (MSL) of Incheon Bay using the long-term tidal observations more than 18.6 years (January 1, 1999 ∼ August 31, 2017) was determined by harmonic analysis. In comparison with the current MSL of Incheon Bay provided by Korea Hydrographic and Oceanographic Agency, the difference of the MSL is 0.035 m. The height of the current Korean vertical original point (KVOP) was reexamined by the newly computed MSL of Incheon Bay and height difference was computed between Tidal Gauge Bench Mark (TGBM) installed near Incheon Harbor and the KVOP. There is a difference of 2.27 cm in between the recalculated height and the current height of the KVOP. In order to check height error in the geodetic leveling network generated from single vertical origin point system based on the KVOP of Incheon, it would be necessary to consider the application of height deviation in multiple vertical origin point systems based on the local (Mokpo, Busan, and Mukho) MSLs.