综合误差系数在新安江模型参数全局优化中的应用

Application of comprehensive error coefficient to global parameter optimization in Xin'anjiang model

采用SCE-UA算法以及综合误差系数的方法构建考虑多因素的单目标函数,并将其应用于新安江模型的参数率定。以皖南山区芦溪流域为例,分别对流域的日径流过程及次洪过程进行模拟,均取得良好的应用效果。研究结果表明,在目标函数中考虑多个精度评定指标,能够使新安江模型模拟结果的整体效果很好,进而更准确地描述流域的水文过程。

A single objective function with consideration of multiple factors was established using the SCE-UA algorithm and the comprehensive error coefficient method,and was applied to parameter calibration in the Xin＇anjiang model.A case study was conducted in the Luxi Basin,which is located in the southern mountainous area of Anhui Province.The daily runoff process and hourly flood process in this basin were simulated,and reasonable results were obtained.The research results show that,by considering multiple precision evaluation indices in the objective function,the simulation results of the Xin＇anjiang model are optimal.In this case,the hydrological processes can be accurately simulated.