Research On Three Dimensional Diffusion Of TBT Of Anti-fouling At Sea

In a highly developed civilization today, the increasing environmental pollution caused everyone's attention, including anti-fouling systems on marine pollution is causing the world's attention. Anti-fouling systems can release some kinds of organotin compounds, Tributyltin(TBT) and Triphenyltin(TPT), TBT and TPT are one of the most toxic chemicals to the aquatic organisms, which are harmful to many organisms, included human, so TBT and TPT have been appeared on the black list in many countries, and their occurrence in aquatic environments were investigated on a large scale. At present, there is still no specific legislation controlling the use of TBT and TPT in china for lack of original data about organotins pollution, say nothing of long-term control, monitoring and research programs. Based on the of Princeton ocean model (POM), this paper introduced and improved the open boundary condition of that, and built the three-dimension dynamic model. The TBT modeling adopts three-dimensional advection-diffusion equation to simulate the TBT diffusion, adopts the numerical optimization methods to analyze and solve the problems with the advection-diffusion equation. To provide a method to estimate for the concentration of TBT in sea.Based on the theory and methods above, the three-dimension current field of Maoming sea area is simulated. As the basis for the assumption that there would be a new repair shipyard in the area of Maoming, compute the spread of TBT around the new repair shipyard were calculated. Results show that the theory is correct and the method is suitable.