感潮河道引江工程综合调度应用研究

以长江中下游地区感潮河道引江调水为实验基础，建立了适合感潮河网的非稳态水量水质耦合模型，分别采用Preissmann隐式差分格式和新的迎风全隐格式求解水动力方程及流扩散方程，改进了河道节点污染物质量浓度的平衡连接和边界污染物质量浓度的处理方法．根据实际水力、水质条件以及引江调水工况，重点模拟了市区包括感潮入河口及出河口水系水流水质变化规律，经过率定与验证，提出了一套参数稳定的感潮河道工程调度方案，并分析了各种引水方案下河段污染物质量浓度过程，最大限度地解决了环境容量在空间和时间上的重新分配．模型在实际工程综合调度中运行稳定，结果可靠，实现了地区水资源的有效利用．

Study on synthetic tidewater-river engineering operation on the Yangtse River

Based on practical engineering operation experiments in the downstream region of the Yangtse River, an unsteady coupling model on water quantity and quality was set up to accomodate the river networks influenced by tidewater. In the model hydro-dynamic and convection-diffusion equations were separately solved by the numerical Preissmann implicit difference format and upwind implicit scheme. Forthermore connection on the river-node concentration and the calculation on boundary concentration were improved. According to practical hydro-dynamic conditions and engineering operations, hydrodynamic and water quality changing trends of urban water systems including river entrances and exit caused by tidewater were modeled. A series of river engineering operation schemes with steady parameters were developed by model calibration and validation. The modeling and running results are reasonable and the model could be operated steadily and environmental capacity could be reallocated in maximum extent at time and space. A basis for the effective utilization of water resources was provided.