Wind, wave and current interactions control the boundary fluxes, momentum and energy exchange between the
atmosphere and the ocean, and within the water column. The wind wave effect on the circulation is investigated in a threedimensional
time-dependant ocean circulation model. This POM (Princeton Ocean Model) based model is implemented
with realistic coastlines in South China Sea and emphasizes the simulation of physical parameters in the water column.
Taking account of the wind waves, an increase in air-sea drag coefficient, reflecting an enhanced sea surface roughness
due to increased wave heights, is shown to improve the simulated surface current and the sea surface elevation. It is also
found that developing waves with smaller peak periods influenced the surface circulation more significantly. The inclusion
of the wind wave parameterization also affects the current near the seabed in the shallow water.
The model is validated against current, temperature and salinity data measured in the Asian Seas International Acoustics
Experiment (ASIAEX). The simulation results in the period of April - May 2001 show that wave-induced surface stress
increases the magnitude of currents both at the surface and near the seabed. On the other hand, wave-induced bottom
stress retards the near bottom currents in shallow water. Therefore the net effect of wind waves on circulation depends on
the significance of current and elevation changes due to wind waves through both the surface and the bottom.