珠江三角州河网与伶仃洋一、三维水动力学模型联解研究

Coupling solution of 1-D hydrodynamic model for the river network of Pearl River Delta and 3-D hydraulic model for Lingding Sea

建立了珠江三角州河网区一维非恒定流水动力学数学模型,并根据实测资料对模型进行了率定验证;利用伶仃洋水域三维水动力学模型的研究成果,采用时段交替法对一、三维模型进行了耦合计算;利用1978年7月在珠江三角州河网区和伶仃洋区同步实测的水文资料对耦合模型的计算结果进行率定验证,结果表明,模型计算值无论在珠江三角州河网区、交接断面以及伶仃洋区均与实测资料吻合较好,该模型可用来描述珠江三角州河网区和伶仃洋区的水动力学过程.

A 1-D unsteady flow hydrodynamic numerical model is developed for the river network region of the Pearl River Delta, and the model is calibrated with the measured data. The research result of the 3-D hydrodynamic model for the Lingding Sea is used and coupled with the 1-D model for the Pearl River Delta network, and a coupling model is generated. Then, the time interval alternative method is used for model calculation. The calculated results by the coupling model are calibrated with the hydrological data synchronously measured in the Pearl River Delta region and Lingding Sea region in July, 1978. The good agreement of the calculated results with the measured data of the Pearl River Delta network region, Lingding Sea region, and their intersecting regions shows that the model can be used to describe the hydrodynamic process of these regions.