Research on the environment influence of land pollution sources on LianYungang sea area

On the basis of the depthaveraged 2D tidal model, the tide feature in LianYungang sea area is studied. Pollutant dispersion in the area is simulated according to the depthaveraged 2D dispersion equation. The halfexchangeperiod of the water body is presented, based on which the effects of West Embankment are probed. The Lagrange residual current field of the area is presented, the effects of which on pollutant dispersion are analysed and the Lagrange track of some typical positions in the area is calculated. The tidal capacity is also calculated and the synthetical analysis on physical selfpurification capability of the water body is conducted.