小洋口附近污染物的扩散输运计算

Computation of diffusion and transportation of contaminations around Xiaoyangkou

应用水动力数学模型对江苏省如东县小洋口附近海域水质因子COD进行扩散场的模拟。模型采用正交曲线网格对整个计算区域进行剖分,对大、小潮情况下的流速、潮位及扩散场进行了研究,并利用排放口附近的现场实测水文资料进行验证。结果表明:水动力模拟结果与实测资料吻合较好,在大、小潮时各个阶段中,流速与流向对COD的迁移扩散起着决定作用,且小潮落憩时刻污水的影响范围最大。

The hydrodynamic model was applied to simulate COD of sewage around Xiaoyangkou, Rudong City, Jiangsu Province in this paper. The curvilinear orthogonal grid is used in interesting area, and hydrodynamics and water quality model are used to the current velocity field and tidal level field both on case of the spring and the neap tide. The computational results are compared with the field data around drain. It shows that the simulation results are consistent with the field data, In each case of spring and neap tide, velocity and direction play an important pole in transportation and diffusion, and the maximum effect to sewage is in neap tide period.