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本文在外高桥顺岸码头工程水环境现状评价的基础上,采用沿水深积分平均的二维水流水质数学模型,结合一定的定解条件,建立了预测该项工程对周围水环境影响的水质数学模型。采用ADI数值计算方法离散控制方程,考虑到顺岸码头下游3km的上海合流污水竹园排放口工程,预测计算工程建成后产生的污染源对评价区水域的水质影响。计算时,主要讨论了化学耗氧量(COD_(Mn))的浓度增量。本模型也可以推广应用于其他河口、海岸流场和浓度场的计算预测研究。
Based on the evaluation of the present situation of the water environment in the Waigaoqiao Shun-wharf project, this paper uses the two-dimensional water quality mathematical model integrated with the water depth and the mathematical model of the two-dimensional water quality with a certain set of conditions to establish a water quality forecasting impact on the surrounding water environment mathematical model. Adopting ADI numerical method to discretize the governing equation, taking into account the 3km downstream of Chuxian sewage Chuk Yuen Estuary downstream of the Shunde Wharf, the impact of the pollution sources after the project is completed on the water quality of the waters in the assessment area is predicted. Calculation, the main discussion of the chemical oxygen demand (COD Mn) concentration increase. The model can also be applied to other estuaries, coastal flow field and concentration field calculation and prediction research.