Based on Min Qian power function formula of flood grade, one method for classifying flood grades by standardized value of flood peak discharge or flood peak stage is put forward in this paper.

• 在闵骞幂函数洪水等级公式基础上,提出了利用洪峰流量或洪峰水位的标准化值进行洪水等级划分,并对嘉陵江北碚站洪水等级进行了划分。