珠江出海口咸潮数值模拟技术

The Numerical Simulation Model of Predicting the Salt Intrusion in the Pearl River Delta

珠江三角洲是中国经济发展速度最快的地区之一,但珠江出海口咸潮上溯的情况日益严重,已经严重影响珠江口的取水安全;对每年枯水期珠江口咸潮上溯的情况进行预警预报,从而采取相应的抑咸措施具有重大意义。文章通过建立珠江三角洲的二、三维嵌套水流盐度数学模型,采用2005年1月的枯水期实测潮流盐度资料对模型进行率定,数学模型的计算结果与实测拟合较好,说明该模型运用于珠三角咸潮数值模拟的可靠性,为咸潮预警预报技术的下一步研究奠定基础。

The Pearl River Delta is one of the most developed area in china,but the situation of the saltwater intrusion has become more and more serious.The saltwater intrusion has influenced the safety of getting freshwater.It is necessary to predict the situation of the saltwater intrusion in dry seasons and take some action to restrain the intrusion.The paper introduced 2-D and 3-D coupling flow and salinity mathematical models to study the tidal current fields and salt data in January,2005.The relatively well fit result between computation output and the field data indicated that the model could reasonably simulate the hydrodynamic and salt fields,which could be the base of the research on the saltwater intrusion prediction technology.