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为了探讨水文模型参数优化结果在不同流域上的稳定性,采用SCE-UA算法优化了抚河流域内的娄家村、南丰、沙子岭子流域新安江日模型参数,以径流总量误差最小和纳什效率系数最大为目标函数,分别对参数优化结果进行分析。结果表明,其中有3个新安江日模型参数(上层张力水容量W_(WUM)、下层张力水容量W_(WLM)、张力水容量W_(WDM))在三个子流域上的率定结果的稳定性相差较大,有1个参数(表层自由水容量曲线方次E_(EX))率定结果有波动,剩余的12个参数的率定结果均较稳定。通过分析新安江日模型参数的稳定性,可为未来新安江模型参数优化的理论研究提供重要参考依据。
In order to investigate the stability of hydrological model parameters in different basins, SCE-UA algorithm was used to optimize daily parameters of Xin’anjiang River in Loujiacun, Nanfeng and Shaziling sub-basins in the Fuhe Basin. The results showed that the total runoff error was the smallest and Nash The maximum efficiency coefficient is the objective function, and the parameter optimization results are analyzed respectively. The results show that there are three Xin’anjiang model parameters (WUM, W WLM and W WDM) in the three sub-basins of which the rate stability is stable There is a big difference between them. One parameter (E_ (EX)) of the free water capacity curve of the surface fluctuates and the remaining 12 parameters are more stable. By analyzing the stability of the daily parameters of Xin’anjiang model, it can provide important reference for the future theoretical research of Xin’anjiang model parameter optimization.