海西湾潮流、COD扩散运动的数值模拟

Numerical Modelling of the Tidal Current and the Diffusion of COD in Haixi Bay

本文采用 ADI 方法模拟了海西湾的潮流、水位场和 COD 扩散运动,所得结果与观测值符合较好。计算结果表明:海西湾自净稀释能力良好;扩建后的薛家岛码头,若以0.5t/d 的 COD 负荷量排放,整个海湾水均属一类水质;如果以二类水质标准来评价距离码头500m 以外的海域,薛家岛码头的最大 COD 负荷量可达2.3t/d.

In this study,the tide,the tidal current and the diffusion of COD in Haixi Bay is simulated by using ADI method.The simulation results show fairly good agreement with the observed field date.Computations reveal that the physical self—purification capabitity of Haixi Bay is quite fine.If COD is discharged at a rate of 0.5t/d from the extended Xuejiadao pier,the water quali- ty in the whole bay can be assessed as the first—class standard.If the water quality in the sea area beyond 500m from the pier is assessed within the second—class standard,the maximum COD discharge will amount to 2.3t/d.