The POM model was applied in both 3D prognostic and
diagnostic versions for suspended sediment transport testing
in estuaries and coastal areas. The 3D internal calculating
mode in both prognostic and diagnostic modes was used
to predict the nearshore strong currents. For the vertically
integrated current calculated by the POM model, the numerical
experiments involving the use of circulation model in the
prognostic and diagnostic modes in the 3D-internal mode
have been performed. In the prognostic mode, the momentum
equations as well as equations governing the temperature
and salinity distributions were integrated as an initial value
problem. These predictive experiments do not always reach
the steady state since the oceanic response time for the density
field can be considerable. As an alternative, diagnostic computations
were considered. In the present study, the experiments
were designed to simulate the currents in the prognostic and
diagnostic modes which were referred to as Exp.I and Exp.II,
respectively.