Multi-time scale analysis of high/low precipitation characteristics in Handan Plain area

High/low precipitation characteristics are important content of precipitation process research. We conducted multi-time scale analysis on the high/low precipitation characteristics of each water resource zone on the Handan Plain using wavelet analysis. The research results showed that: (1) There is a 5 years’ or 9 years’ periodicity in the precipitation processes of all zones on the plain. There is also a 2 years’ or 13 years’ periodicity in the precipitation processes of all zones except for Fuxi Plain. A 21 years’ periodicity is also prominent in the precipitation processes of Zhangweihe and Heilonggang Plains. (2) The high/low precipitation alternation is prominent in all zones on the 5-year and 9-year scales. (3) The high/low precipitation responses of different zones vary on different time scales, and show varied high/low characteristics and evolution trend. The results can provide reference for the local water management and early warning of regional droughts and floods.

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