Abstract:

Abstract: We use the precipitation documentation in the flood season over the year of 1954-2007 of Puyang to analyze the time scale changing characteristic of more precipitation of Puyang flood season in a linear method. It is found that the total precipitation of flood season shows a reducing trend in the later 30 years. There is a largest precipitation and most rainstorms in July. The most rainstorm strength takes place in August. The rainstorm has a characteristic of taking place continuously, even every year!