Numerical simulation of pollutant transport in Xiangshan bay

In this paper,a hydrodynamic model was built based on FVCOM.And the calculated results were in agreement with the measured data.Then a contaminant transport model was made,and the diffuse process of contaminants from major land-based outlets was simulated and discussed in Xiangshan harbor.Furthermore,the drift-diffusion rules of pollutant were given.The results show that the pollutant is at a low level in the wide area at Xiangshan bay' s entrance,where the residual current is relatively weaker,however the tidal current is the active force of pollutant transport,and pollutant density can be thinned at a high rate of speed.Due to joint effect of residual current and tidal current,the pollutant levels become a little higher,which are quite lower at a low tide in the middle of the bay.And the region at the bottom of Xiangshan harbor is close,and there obviously is a couple of eddies at the entrance of Tie port,where the tidal exchange is weak and the pollutant level is the highest.