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流域汇流曲线都可视为圣维南方程组的简化,简化假定的优劣,最终都以对实测洪水的的还原及验算精度为标准。列入设计洪水规范的瞬时单位线,本身存在着一些缺陷:例如矩法参数的还原精度不高,擒而用电算优选值;有时为提高还原精度,对基流作偏高切割,也给确定参数带上了任意性;此外它的流域汇流模型是假定全部净雨从串联水库的最上游进
The confluence curves in the basin can all be regarded as simplifications and simplifications of the Saint-Venant equations. Finally, both the reduction and the verification accuracy of measured floods are taken as standard. The instantaneous unit line included in the design flood standard has some defects in itself: for example, the accuracy of the method of moment method is not high, and the optimal value of the calculation is used. Sometimes, in order to improve the reduction accuracy and cut the base flow at a high level, The parameters are determined arbitrarily. In addition, its catchment model assumes that the entire net rain travels from the most upstream of the tandem reservoir