河口潮流和水质数值模拟研究

河口与海岸环境中污染物质的稀释扩散，是环境流体力学研究的重要课题，同时也是城市污水排海工程建设的关键技术之一。该文采用沿水深积分的平面二维非定常流动数学模型，来计算污染物质降解影响的溶解物质输运扩散过程，并以长江口水域为例，对潮汐水流中溶解物质的稀释扩散过程，进行了细致的数值模拟。结果表明，潮型，排放量，污染物质的降解等，对污水排放口的远场水质有明显的影响。

Study of Estuarine Tidal Flow and Water Quality Mathematical Simulation

Dilution and diffusion of pollutants in the environment of estuary and seacoast are important themes of environmental fluid mechanics and one of the critical techniques of sea drainage works of municipal sewage. This paper adopting integral plane two-dimension indefinite flowing mathematical model along water depth to calculate the transporting diffusion process of dissolved substances impacted by pollutants degradation, and taking Changjjan Estuarine water region as examples to conduct mathematical simulation of the process of dilution and diffusion of dissolved substances in tidal water flow carefully. The result showed that the tidal type, emission amount and degradation of pollutants have remarketly impacted on water quality far away from sewage outlet.