黄浦江水环境模拟计算边界条件影响分析

在大系统多尺度耦合模型基础上，细化黄浦江干流二维模型，分析了边界条件对黄浦江干流水环境模拟计算的影响，认为：黄浦江干流水动力条件主要受上游米市渡边界潮汐流量和下游吴淞口边界潮汐水位的影响，各支流汇人流量（即侧边界）基本不产生影响．黄浦江干流水质主要受上游米市渡来水、沿岸排放污染源的共同影响，其中黄浦江上游松浦大桥断面水质主要受上游米市渡来水的影响；黄浦江干流中游临江、南市水厂断面水质受上游米市渡来水、沿岸排放污染源的共同影响；黄浦江下游杨浦大桥断面水质主要受沿岸排放污染源的影响．

Analysis of Boundary Conditions on Hydrodynamic and Water Quality Simulation for the Huangpu River

On the basis of coupled water environmental models of different spatial scales,the two-(dimensional) vertically averaged models suitable for tidal rivers with complex topography are further developed.Key hydrodynamic and water quality factors contributing to the Huangpu River's pollution are probed.For the hydrodynamic factors,the key factors are water inflow at upstream boundary at Mishidu and tidal water level at downstream boundary at Wusongkou,while other factors such as tributary inflow or outflow can be neglected.For the water quality factors,main factors include upstream water the quality boundary at Mishidu and local pollution discharge along the Huangpu River mainstream.However,these factors influence differently in different reaches:the upstream boundary is the basic factor influencing water quality of upstream reaches;the upstream boundary and local discharge jointly contribute to the water quality of midstream reaches;the local discharge is the basic factor influencing the water quality of the downstream reaches.The quantitative contribution ratios of water quality factors were also presented in this paper.