【摘要】 针对平原感潮河网的水文和水力学特性,结合甬江流域实际,建立了平原河网水利计算混合模型,采用Preissmann四点隐式格式,合理选定权重系数,并运用河网最优节点编码法的3级解法进行求解;利用2000年桑美台风暴雨洪水对模型进行验证计算,结果表明模型是可靠适用的。考虑不同重现期暴雨和潮位的组合情况,采用研究建立的河网水利计算模型对规划防洪工程全面实施后甬江流域河网节点水位进行了合理计算。更多还原

【Abstract】 Based on hydrological and hydraulic characteristics of plain tidal river network,a hybrid hydro-calculation model for plain river network is established according to the actual conditions of the Yongjiang River Basin.By using 4-point Preissmann implicit scheme and reasonably selecting weight coefficient,the solution is obtained by use of the 3-level solution method of optimal node coding and verified by SAOMEI typhoon rain in 2000.It shows that the model is reliable and applicable.Considering storm of different recurrence interval in combination with tidal level of different recurrence interval,the hydro-calculation model for river network is used for reasonably calculating the node water level of river network in the Yongjiang River Basin on the basis of the complete implement of flood control projects in planning.更多还原