Optimum Open Boundary Conditions For Coupled Numerical Model Of Tide, Surge And Wave

The present study suggests an estimate method of currents combined with surges and tides as values of open boundaries using the Flather's condition for a 2 dimensional coupled model of surge, wave and tide considering the wave-current interactions on the surface and bottom boundary layers. We found that the present method made an improvement in the reduction of spin-up calculation duration and was more stable in comparison between other radiation conditions with currents or water levels with either fixed or variable phase speeds.