感潮河道分流比研究

Research on the Split Ratio of Tidal River

通过分析澡港河及老澡港河东支的现状水文情势,研究影响感潮河道分流比变化的主要水文因素。通过对澡港河开展不同潮流期的水文测验,结合圣维南方程组在感潮河道水文测验中的应用,进行水位、流量及潮量的计算,分析得出澡港河及其东支分流比的变化规律,两河分流比:大潮汛期7:3;小潮汛期5:5。从而为进一步开展引江济太工程的水资源调度、合理规划水利枢纽工程的建设、城市防洪及水环境容量等水文分析计算打下良好的基础。

Based on the analysis the current hydrological situation of the Zaogang River and the eastward branch of Laodaogang River, the main hydrological factors which affect the diversion ratio of the tidal waterway is studied in this paper. On the basis of the combination of hydrologic survey in Zaogang River at different tidal periods and the Saint-Venant equations, the water levels, flow discharges and tidal volumes at different are calculated and the temporal variation of the diversion ratio is obtain. The diversion ratios of the two rivers are 7：3 during the major flood tide and 5：5 during the small flood tide. The study lays a good foundation for the water resource management of the Taihu-Yangtze Water Diversion Project, the water conservancy project planning, urban flood control and water environmental capacity calculation et al. in the future.