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针对水文模型的输入误差直接影响模型模拟精度的问题,以两参数月水量平衡模型为研究对象,探讨了模型的两个重要输入因子降雨与蒸发误差对模型模拟精度的影响,并以岳城子流域为例,研究了输入因子系统误差、随机误差的影响,选取各季节的代表月探讨了输入误差的影响规律,分析了参数率定对误差影响的补偿效果。结果表明,在设定情景下,系统误差的影响程度高于随机误差、降雨误差的影响显著高于蒸发误差、误差水平与模拟精度不呈等比例关系,且参数率定对误差影响存在不可忽视的补偿作用。
Aiming at the problem that the input error of hydrological model directly affects the simulation accuracy of the model, taking the two-parameter monthly water balance model as the research object, the effects of rainfall and evaporation error of two important input factors on model simulation accuracy are discussed. As an example, the influence of system error and random error of input factors was studied. The influence law of input error was investigated by selecting the representative month of each season, and the compensation effect of parameter calibration on error was analyzed. The results show that the influence of system error is higher than that of random error in setting scenarios, and the influence of rainfall error is significantly higher than that of evaporation error. The error level and simulation accuracy are not proportional. The influence of parameter rate on error can not be neglected The compensation effect.