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在一般的水动力模拟中,入湖河口的数量和位置基本是不变的。鄱阳湖水位高动态变化的特征,导致了入湖河口数量和位置变化等特殊的运动边界问题。本文在分析水动力模拟的湖泊形态结构特征的基础上,概化了高水位湖相型、中水位涨水型、中水位退水型和低水位河相型4种水动力形态结构模式,以解决高水位变幅导致的边界移动、入湖河口数量和位置变化等运动边界序列问题,4种水动力形态结构模式之间的运动边界问题,采用在计算流体力学领域中现有的干-湿网格法运动边界处理技术,从而形成浅水湖泊复杂边界高动态水位条件下复合模式的运动边界处理方法;并利用MapWinGIS开发控件,实现了不同模式的边界拟合正交曲线格网的生成与模拟结果的可视化;系统采用面向对象的Visual Studio C#和Visual Fortran编程语言,以松散耦合方式将数据前后处理与交互模块与水动力模拟的核心模块进行集成。利用集成的鄱阳湖水动力模拟系统并采用低水位河相型模式对1999年12月6-14日的鄱阳湖水动力进行了模拟,模拟结果表明系统具有较好的运动边界处理效果。
In general hydrodynamic simulation, the number and location of estuarine estuaries are basically unchanged. The characteristics of the high dynamic change of Poyang Lake water level lead to the special movement boundary problems such as the change of the number and location of the estuary. Based on the analysis of lake structural features of hydrodynamic simulation, this paper generalizes four hydrodynamic structural modes of high water level lake facies, middle water level water level, middle water level retreat type and low water level river facies to solve Boundary Movement Caused by High Water Level Fluctuations, Movement Boundary Sequences of Changes in the Number and Location of Intake Lakes, and Boundary Problems of Four Kinds of Hydrodynamic Structures and Structures. The existing dry-wet nets in the field of computational fluid dynamics Lattice movement boundary processing technology to form complex dynamic boundaries of shallow water lakes and complex dynamic boundary conditions processing methods; and the use of MapWinGIS development controls to achieve different modes of border fitting orthogonal curve grid generation and simulation results The system uses object-oriented Visual Studio C # and Visual Fortran programming languages to integrate data pre- and post-processing with interactive modules and core modules for hydrodynamic simulation in a loosely coupled manner. The integrated Poyang Lake hydrodynamic simulation system and the low water level river model were used to simulate the Poyang Lake hydrodynamic force from December 6 to December 14, 1999. The simulation results show that the system has a good motion boundary treatment effect.