Based on the research results of the National project KC09-24/06-10, in this paper the authors would like to present the experimental calculation results - a program called Phan Thiet Ver 1.0 - obtained from a physical model with simplified conditions to calculate and predict material (particles) transport in Phan Thiet bay. In the first version, the process of particules transport is simulated in the good mixing layer from 30 meters depth to the surface. The computed model comprises of two parts: + Dynamical model: The 3D nonlinear model was solved by finite element method, simulating the resultant current (tidal currents, residual current) during the two main south-west and north-east monsoons. + Transport model: Monte Carlo (incidental) method was used for calculatio!1 of about 5.00a elements located at arbitrary positions (particles tracking), in the study area. The authors did not included the biological, physical, chemica! and interaction processes into the calculation of the movement of the elements. The initial computed results aIlow us to identify the places where enrironmental hazards may occur, and its development and occurrence time as well.
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