Numerical simulation of wave-tide induced longshore current in Rongxi
荣喜近岸区波流耦合作用下的流场模拟

Wave-tide induced longshore current in Rongxi area will be discussed in the potential paper. A hydrodynamic model COHERENS is coupled with the third generation wave model SWAN. Inside COHERENS, SWAN is regarded as a subroutine and it gets time- and space-varying current velocity and surface elevation from COHERENS. COHERENS gets time- and space-varying wave relevant parameters calculated by SWAN. Wave-enhanced bottom stress, wave dependent surface drag coefficient and radiation stress are introduced to COHERENS. Then a fully coupled hydrodynamic-wave model OHERENS-SWAN accounting for interaction between wave and current is obtained and adopted to simulate longshore current in Rongxi area. Generally, the values of time series of current velocity, current direction and water level have a good agreement with the observed data.