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推理公式法在国外称为“合理化”法,特点是给出最大流量值。因该方法的计算成果能够满足小流域面积的中小型工程的设计要求,已被水利、公路、铁路等部门广泛采用,也作为较大流域面积的大中型工程设计洪水计算的参考。用推理公式法推求设计洪水的基本公式比较复杂,常规计算需要用试算法或者应用诺模图求出设计频率年的洪峰流量等,计算过程比较麻烦。为简化计算,提高工作效率,下面把《河
Reasoning formula method in foreign countries known as “rationalization ” method, characterized by the maximum flow value is given. The calculation results of this method can meet the design requirements of small and medium-sized projects with small drainage area. It has been widely adopted by water conservancy, highways and railways as well as a reference for large and medium-sized engineering design flood calculation of large drainage area. The reasoning formula method to infer the basic formula of design flood is more complex, the conventional calculation needs to use the trial algorithm or the application of nomogram to calculate the peak frequency of the design frequency of the year, the calculation process is too much trouble. To simplify the calculation, improve work efficiency, the following "river