پيش بيني كوتاه مدت انتشار، استهلاك و نفوذ لكه هاي نفتي در آب هاي خليج فارس با بهره گيري از يك مدل هيدروديناميكي جديد

چكيده انگليسي :

Abstract Over the past three decades simplified empirical formulae contributed greatly in a rapid evaluation of the pollutant dynamics spreading and drifting Modern models can utilize more accurate and physically relevant mathematical formulations In the majority of cases a mathematical modeling may be a strong and available tool not only for a rapid computation of the pollutant fate but for simulation of the various cleanup operations as well The computer simulation of complicated marine environment problems has become one of the interesting areas of the research works by development of efficient and accurate numerical methods suitable for the complex flow domain Numerical models are widely used as an important component of contingency planning and coastal management Such models act as a real time prediction tool to support in combating and prediction of contaminant movement in order to preserve the region s coastal resources One of the important applications of using such models is to provide cost effective and reasonable estimates of oil surface drift and predict transport and fate of the oil slicks Therefore this model as a 3 dimensional model is suggested for consideration in the Persian Gulf The Persian Gulf region is well known as the most active oil production region in the world Some researches for the Persian Gulf have been already done for providing hydrodynamic Atlas simulation and validation of some documented events Also providing oil spill hazard contour maps for the prediction of oil spill travel time based on critical sea conditions are their outcomes Although some studies related to the oil spill have been published for the Persian Gulf it still needs to some improvements and modifications and speed up procedures as well Here a 3D model is developed to generate the dynamical field for the Persian Gulf The model is presented to illustrate how the geostrophic approximation can be systematically exploited to produce a deterministic dynamical framework adequate for the calculation of motions of large time and space scales This model shares the essential dynamical character of the geophysical system This is in fact a new hydrodynamic approach of tidal currents in the Persian Gulf due to tidal fluctuations It is revealed that the region is located in shallow water intermediate range 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 A wind field is used and in order to provide required parameters a data base such as wind field salinity temperature density field tidal constituents water surface level and velocity have been provided for the region of interest in a proper time interval 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 The performance of this alternative hydrodynamic model is tested against measurements at selected locations to find a reasonable agreement and to calibrate the hydrodynamic model The dynamical field estimated by two different hydrodynamic models is in fair agreement especially in the intermediate range Results of the simplified model measurements and another hydrodynamic model have been compared 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 tr

بدري، محمد علي

پيش بيني كوتاه مدت انتشار، استهلاك و نفوذ لكه هاي نفتي در آب هاي خليج فارس با بهره گيري از يك مدل هيدروديناميكي جديد

مدلسازي عددي , مدلسازي انتقال و انتشار نفت , خليج فارس