Runoff forecasting model construction method and device, electronic equipment and medium

The invention belongs to the technical field of hydrological analysis, and particularly relates to a runoff forecasting model construction method and device, electronic equipment and a medium. The method comprises the steps of obtaining a historical hydrological sequence of a target drainage basin and a target distribution function used for fitting a hydrological distribution condition of the target drainage basin; substituting the historical hydrological sequence into the target distribution function to obtain a first probability sequence; obtaining a probability prediction model, a second probability sequence and a prediction error sequence according to the first probability sequence; generating an error probability correlation function according to an error threshold sequence and the prediction error sequence; and according to the inverse function of the target distribution function, the probability prediction model and the error probability correlation function, generating a runoff prediction model for pr