Numerical simulation of three-dimensional pollutant transport in a narrow bay, Xiangshan Bay

In order to study the pollutant transport characteristics in a narrow bay, Xiangshan Bay, the residual currents and characteristics of the pollutant transport have been calculated and analyzed based on a three-dimensional hydrodynamic numerical model. The results reveal that residual currents are different in different areas. In the fjord, the residual currents in vertical direction divide into two lays at 0.4~0.5 depth in summer. Currents of the upper layer flow to the bay mouth and those of the lower layer flow to the opposite. The main residual current direction in the outer area is horizontal. Then the trajectories of pollutant in Xiangshan Bay are simulated based on the Lagrangian particle tracking method. The pollutant transport rule is discovered which can provide the basis for the drain location and the management of estuarine environment.