Over the past three decades simplified empirical formulae contributed greatly in a rapid evaluation of the pollutant dynamics spreading and drifting.Numerical models are widely used as an important component of contingency planning and coastal management. One of the important applications of using such models is to provide cost-effective and reasonable estimates of oil surface drift and predict traort and fate of the oil slicks . Therefore, this model as a 3 dimensional model is suggested for consideration in the Persian Gulf .Here, a 3D model is developed to generate the dynamical field for the Persian Gulf .This is in fact, a new hydrodynamic approach of tidal currents in the Persian Gulf due to tidal fluctuations.So, the hydrodynamic equations consist of shallow water equations of continuity and momentum are considered and simplified. By means of the Kelvin wave theory, it has been justified that this new hydrodynamic calibration approach presents about 15 persent better results in short-term compared with an alternative hydrodynamic model in the Persian Gulf .In the present study, by using MIKE-HD as an alternative hydrodynamic model, the surface elevations and water currents at different depths were obtained to determine the velocity field and the advection properties of oil slick has been determined by MIKE-SA.It has been revealed that this new improvement as an estimation of the flow pattern, is a promotion not only towards simplicity, but also presents a speed up procedure for short-term oil spill simulations.This prediction by taking into account the wind and tidal stream effects, affects more than 60% increasing of oil surface area, applying in determining of oil slick surface area and thickness and oil trajectory may lead to oil recovery scenario. Comparison of the actual and simulated oil spill drift was found acceptable allowing in providing oil spill hazard contour maps in the northern part of the Persian Gulf in the Iranian waters. In a typical case study, about 25 % of oil is evaporated and 19% is emulsified, while about 20% is dispersed in the water column. Therefore, after 1.5 days, only about 36% of released oil is remained in the water surface.Therefore, the main outcome of this thesis would be a simple estimation for the flow pattern by using Kelvin wave theory for a short-term oil spill. Also, capability of using a wind field, facilitates the possibility of applying a simple and speedy method to provide oil spill hazard contour maps.
