Impact on the Circulation in the Sumjin River Estuary under summer monsoon condition
Impact on the Circulation in the Sumjin River Estuary under summer monsoon condition
Previously Published Material: Partial result were published in the Journal of Korean Coastal and Ocean Engineering Society.
Abstract ID#: 33642
English Abstract:
The Sumjin/Kangjin Estuarine System (hereafter, SKY) is one of most complex and the lastly remained natural system whose river runoff is drained into the South Sea of Korean Peninsula and is interconnected among Sumjin River, Kangjin Bay and Kwangyang Bay through very narrow channel.
During the monsoon season, River runoff is around 300 to 500 % of normal condition. River runoff is dominant forcing for the estuarine circulation system in addition to tidal forcing with 4.5 meter range.
Among many features, we have reproduced the tidal and residual current system with skill scores > 90 %. Very strong tidal current is reproduced with speed exceeding 3.5 m/s in the Noryang Channel and 2.5 m/s in the Changson Channel. Residual current shows very complex pattern with local eddy motions with radius around 2~3 km with clockwise and counterclockwise rotations.
In the Yeosu Channel where the longitudinal length is around 30 km, and cross-channel width around 5~8 km, the tidal current speed exdeeded 2.0 m/s during monsoon season. It also shows the asymmetry of current and salinity field due to deflection effect by the Coriolis Force.