洪水演进实时计算系统研究——以卫河右堤防洪保护区为例

Flood evolution real-time computing system——taking protection zone on the right bank of Weihe River as an example

针对复杂的实时水、雨、工情条件,开展任意水文及溃口条件下洪水演进实时计算模型研究与系统开发,对实际防汛工作具有重要的作用。程序稳定性、计算效率是洪水演进实时计算的关键点。基于二维浅水方程,运用Godunov型非结构有限体积法,建立了适应复杂地形的洪水演进水动力学模型;针对溃堤洪水演进特点,通过优化模型算法,显著提高了程序计算效率。海河流域卫河右堤溃堤洪水模拟案例表明,本模型基本满足实时计算要求。

Studies on modelling and system development for flood evolution real-time computing system under any hydrological and breach conditions have great significance to flood control in practice, especially when real-time water, rainfall and working conditions are complicated.The key point for real-time calculation of flood evolution relies on stability of program and computing efficiency. Based on two-dimensional shallow water equations, a hydrodynamic model of flood evolution that suits to complex landform is established by means of Godunov type unstructured finite volume method. Considering the features of flood evolution during embankment breach, it is found that optimization model and algorithm can greatly increase the efficiency of program calculation. Simulation on protection zone on the right bank of Weihe River demonstrates that the model can satisfy the needs of real-time computing.