基于Simulink的可视模块化地面径流汇流过程仿真

Visual and Modularized Simulation of Surface Flow Concentration Processes Based on Simulink

以Simulink为模块化建模手段实现对流域的净雨-地面径流过程的可视模块化仿真。使用的汇流方法为瞬时单位线(IUH)法,据此理论建立IUH-Simulink地面径流汇流仿真模型。并对建立的Simulink模型参数进行校准,采用的优化算法为将遗传算法和直接搜索法结合在一起的模式搜索法。在两个运用实例中与传统矩法估计参数的方法进行了比较,结果表明:建立的Simulink可视模块化地面径流汇流仿真模型是一种有效可靠的仿真方法;模式搜索法估计的参数,其模拟精度较传统矩法有较大幅度的提高,特别是均方根误差,降低幅度可达55.42%。

The visual and modularized simulation of net rainfall - surface runoff processes based on Simulink was realized. The simulation method of concentration was instantaneous unit hydrograph （IUH）, IUH-Simulink convergence of surface runoff model was established according to this theory. And the pattern search method together with genetic algorithm and direct search method was used to calibrate the Simulink model parameters. Compared with the traditional moment method to estimate the parameters method in the two application examples, the results show that the Simulink based method is an effective and reliable way to simulate the processes. For the 2 parameter estimation methods used, the estimation accuracy by using the interactive pattern search method is much higher than that by the moment method, and the root mean squared error has been increased by a rate of 55.42%.