南水北调中线工程总干渠水力学 仿真模型研究

以节制闸为边界将南水北调中线总干渠分为若干子段，采用闸门过闸流量公式、能量方程、圣维南（Saint-Venant）方程组和低压管流方程分别计算闸门水位流量关系、明渠恒定流、明渠非恒定流和有压建筑物非恒定流，以此建立总干渠水力学计算模型。通过双重迭代方法对水流方程、过闸流量方程进行联合求解，以模拟总干渠运行调度动态过渡过程，以京石段2008年输水实测数据对水力学模型进行验证，结果表明模型具有良好的收敛性和较高的精度。

Study on hydraulic simulation model of main canal of Mid-route of South-to-North Water Transfer Project

The main canal of Mid-route of South-to-North Water Transfer Project is divided into several sub-sections by check gates, and then the stage discharge relation at gate, steady flow in open channel, unsteady flow in open channels and unsteady flow through pressure diversion structure are respectively calculated by gate flow equation, energy equation, Saint-Venant equations. On the basis of this, the hydraulic calculation model of the main canal is established. Through the dual iterative method, the water flow equation and the gate flow equation are jointly solved, so as to simulate the dynamic process of the operation of the main canal. Moreover, this hydraulic model is certified with the measured data of the water conveyance through Beijing-Shijiazhuang section of the canal in 2008. The result shows that the model has perfect convergence and high accuracy.