SOME STUDIED RESULTS ON THE RESIDUAL CURRENT IN THE SOUTH-CENTRAL COASTAL WATERS OF VIET NAM
Studied results show that tidal residual current in the south-central waters has no significant influence, its maximum velocity is below 4cm/s. However, when studying the influence of the resultant current of 5 tidal constituents M 2 , S 2 , N 2 , O 1 , K 1 , the residual current velocity can reach 22cm/s in the coastal waters from Binh Thuan to Tra Vinh, but it is much weaker in other coastal areas.
Using the same finite element method, the calculation results obtained by the 2D nonlinear (influence of thermo-haline distribution not included) and 3D nonlinear (influence of thermo-haline distribution included) problems are different in direction of the maximum velocity and in the occurrence/no occurrence of a cyclone eddy in the south of Binh Thuan waters. This is a complicated and new problem in the study area, which we will try to clarify in the next study.