运河水网水量数学模型的研究和应用

Development and Application of a Mathematical Model for Computing Water Quantity in the Grand Canal Network

本文分析了运河水网的水文和水力学特性,并针对这些特性建立了运河水网水量计算的混合模型.该模型兼含结点-河道模型和单元划分模型的优点,适用于大型复杂平原河网地区的水量计算.本文还对河网的概化和产流分配计算、用水量计算等问题提出了一系列具体处理措施,保证了水网水量计算的顺利进行.计算结果表明,本文提出的混合模型和相应的处理措施能够很好地适应象运河水网系统这样大型复杂水网的水量计算,计算结果能满足工程实际的要求.

Based on the analysis of hyhrological and hydraulic characteristics of the network of Grand Canal, a hybrid mathematical model is established to compute water quantity of the network. The model has the advantages of both node-channel model and element-division model and can be applied in water quantity computation for complex networks in plain areas with large scale. A series of measurements have been fulfilled for skeletonization strategy, rain fall-runoff calculation used-water quantiey calculation, etc. , thus providing a solid foundation for water quantity computation of the network. Computational results show that the hybrid model and those measurements presented in this paper are suitable for water quatity computation of complex networks with large scale, like the Grand Canal network system, and that computation results are satisfactory to engineering practice.