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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%。
Visual Modularization Simulation of Net Rainfall - Surface Runoff in the Watershed with Simulink as a Modular Modeling Tool. The convergence method used is the instantaneous unit line (IUH) method. Based on this theory, IUH-Simulink ground runoff convergence simulation model is established. The calibration parameters of Simulink model are calibrated. The optimized algorithm is a pattern search method that combines genetic algorithm and direct search method. The results of comparison between the two methods and the traditional method of moment estimation indicate that the Simulink visual modular ground runoff simulation model is an effective and reliable simulation method. The estimated parameters of the pattern search method are Compared with the traditional moment method, the simulation accuracy is greatly improved, especially the root mean square error, with a reduction of 55.42%.