径流和潮汐对长江口盐水入侵影响数值模拟研究

Numerical Simulation Study of Effect of Runoff and Tide on the Changjiang River Mouth Saltwater Intrusion

影响长江口盐水入侵的主要动力要素是上游径流和外海潮汐。利用盐度实测资料验证了平面二维盐度数学模型。结果表明,实测资料和模拟结果相符,在此基础上进行了4种不同水文组合的模拟计算。通过计算结果分析,取得了长江口地区盐水入侵平面分布的基本规律。

The main dynamic factors affecting the Changjiang River mouth saltwater intrusion are upstream runoff and outsea tide. In this paper, the observed salinity data are used to verify the two-dimensional mathematical salinity model, it is shown from the simulated results that the simulated results are consistent with the observed data, and the simulation computations for 4 kinds of hydrographic condition combination are made based on the above-mentioned mathematical model. Finally, the basic regularities of the horizontal distributions of the Changjiang River mouth saltwater intrusion are obtained by analyzing the computed results.