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以汉江上游向家坪水文站以上流域为研究对象,通过对集总式模型Hymod的参数敏感性分析和多目标参数优化,分析了Hymod模型5个主要参数的敏感性特征,体现了该模型描述降雨径流过程特点的全面性,采用多目标遗传优化算法(NSGA-Ⅱ)对模型参数作多目标自动参数优化。结果表明,Hymod模型能较好地描述流域降雨径流过程特征,并能通过参数自动优化得到最优参数并取得理想的验证效果。
Taking the watershed above Jiajia Hydrographic Station in the upper reaches of the Hanjiang River as the research object, the sensitivities of the five major parameters of the Hymod model were analyzed by parametric sensitivity analysis and multi-objective parameter optimization of the Hymod model. The model description The characteristics of rainfall-runoff process are comprehensive. The multi-objective genetic algorithm (NSGA-Ⅱ) is used to optimize the model parameters automatically. The results show that Hymod model can describe the characteristics of rainfall-runoff process well, and can get the optimal parameters through automatic optimization of parameters and obtain the ideal verification results.