Rainfall forecasting device, rainfall forecasting method, and recording medium

摘要

It is possible to perform prediction with excellent robustness while guaranteeing the prediction accuracy for the entire prediction period to a certain extent. The rainfall amount prediction apparatus executes, for the first period in the prediction period, prediction of rainfall according to the first prediction model capable of prediction with the first accuracy to create a first prediction pattern, and (1) A first prediction means for calculating a first total rainfall amount, which is a total rainfall amount in a prediction pattern, and a second prediction model capable of prediction with a second accuracy lower than the first accuracy over the entire prediction period The forecast of rainfall is performed to create a forecast pattern, the total rainfall amount which is the total rainfall amount in the forecast pattern in the entire forecast period is determined, and the first total rainfall amount is subtracted from the total rainfall amount, The second total rainfall amount which is the total rainfall amount of the second period other than the first period in the prediction period is determined, and under the restriction of the second total rainfall, the prediction pattern for the second period and the rainfall pattern is Create different second prediction patterns 2 comprises a prediction unit, and a pattern generating means for generating a plurality of rainfall predicted pattern for the entire prediction period by combining the first predicted pattern and a plurality of second prediction pattern on the time axis.