胶州湾COD、N、P污染物浓度数值模拟

在已建潮流模型的基础上，建立了胶州湾三维变边界污染物平流-扩散模型，模拟了胶州湾COD、N、P污染物现状浓度分布。结果表明，胶州湾主要污染因子为N，海湾东北部污染较为严重，东岸形成一条狭长的带状污染区，模拟结果与实测资料符合良好。本文统计了COD、N、P超标面积，N超一类水域面积为253km^2，占整个胶州湾面积的64％，COD和P大部分水域满足一类海水水质标准。模拟结果可为胶州湾水质管理、入海污染物总量控制提供依据。

Numerical simulation on concentration of pollutants COD, N and P in Jiaozhou Bay

Based on the established tidal current model, a tree-dimensional variable boundary advection-dispersion model was built up. The concentrations of COD, N and P were simulated. The results showed that the main factor of pollution is nitrogen in Jiaozhou Bay. Northeast of Jiaozhou bay has been polluted badly, especially there was a narrow band polluted zone on the east bank. The simulated results are consistent well with the observations. The area of nitrigen concertration below the first class standard is 253 km~2, which is about 64% of Jiaozhou Bay, as for COD and phosphate, the most of the sea area is satisfied for the first class seawater quality standard. The simulated results provide the evidence for the management of marine environment quality, and the total mass control of pollutants in Jiaozhou Bay.