驾驭式洪水演进模型在蓄滞洪区联合防洪中的研究与应用

Research on Steering Flood Routing Model and Its Application in Flood Combined-Regulation in Detention Basin

基于一、二维非恒定流基本控制方程,建立了蓄滞洪区洪水演进数学模型.模型采用具有旁侧出流的河网独立计算的一、二维多口门嵌套衔接模式,将一维河道嵌套于二维分洪区中.通过混合编译方法实现了该模型的可视化驾驭功能.介绍了驾驭式模型的基本结构,讨论了该模型混合编译的不同实现方法的优缺点,提出了在保留计算模型独立性和完整性前提下具有通用性的可视化驾驭模型快捷建立方法.结合历史洪水资料,模拟了永定河蓄滞洪区百年一遇洪水演进过程.实现了模拟过程中对各分洪区口门开关和堤埝突发决口事件的监控.

A steering detention basin flood routing model is established based on the one-dimensional and twodimensional non-invariablenes flow control equation.Flood multi-entrances nested mode is proposed and used to couple the independent one-dimensional river mesh to two-dimensional flood-diversion area mesh.The model’s major structure is introduced,and its visualization and steering function is realized by mixed language programming method of Visual-Basic(VB)and Fortran.Then several different mixed programming methods with their merits and faults are discussed.Moreover a fast method to set up visual steering model with its independence,integrity,and universality is introduced.At last,by referring to the historical investigation data of the worst flood during the past 100 years,flood routing process in Yongding River detention basin is simulated with status of diversion entrances and dikes under steered.