Numerical Simulation Of Oil-spill In The Xihu Trough Of The East China Sea

An oil particle-tracing model was built to simulate the pollution of oil spill in east China sea . Based on the tidal-current numerical simulation, oil-spill drifting was simulated. The model dispersed the oil slick into a lot of oil particles, and each of them represented certain quantity of oil. The transport was driven by the surface-layer current and wind. And the spreading of the slick can be simulated through the random-walking of oil particles. In order to simulate the oil slick drifting track and sweeping range, the crude oil from Xihu Trough is chosen as oil-spill kind under different wind situation in different seasons.My research content and result for detail :1. By collecting the satellite sea surface wind field data of East China Sea, given seasonal time period of the dominant wind direction and wind speed in the simulated area.2. Simulated the current of East China Sea in our aimed time period, using FVCOM. Verified the simulation by comparing with the surveying current date of East China Sea.3. By collecting some related data and documents, we do some improvement on the oil-particle method .We added wind-stretching effect into the first period of oil-slick expending instead of using total turbulence treatment.4. Simulated oil-spills in 2006 and 2007 seasons under different wind conditions and different oil volume ; oil slick area,residual volume and oil-dissolved were calculated. Analyzed the possible point and time of oil slick landing.5. Make an analysis of the fishery resource density in different season of the East China Sea from 2000 to 2002 and how the oil spill effect the fishery resource. This analysis may give some support to the assessment of oil spill damage. 6. By summarizing the development of oil spill model,weather forecast model and ocean model in the past few decades, we made a forecast of oil forecast model in the near future.