Sea Level Change due to Nonlinear Tides in Coastal Region

摘要

In coastal region,tidal harmonic constants of semi-diurnal tides and nonlinear tides were collected.The observed tide data of KHOA were analyzed by a tide harmonic analysis method.In the southwestern coasts and Han river estuary,nonlinear tides are clearly generated.The generation of tide non-linearity and tide asymmetry is closely related with tide form factor in Korean coastal zone.Tide non-linearity and asymmetry in Mokpo harbour have increased by a series of coastal development projects.The increase has caused rise of high water level and drop of low water level,and increase of tidal range.In Kunsan Outport,tidal range has been declined due to inter-annual change of nonlinear tides after completion of Samangeum sea-dyke.