Abstract
The occurrence of flood disasters is related to persistent heavy rainfall anomalies. Under the influence of climate anomalies, the rainfall, rainfall intensity and frequency in Zhengzhou have been rising in recent decades. In order to further describe the rainfall characteristics in Zhengzhou area, Pearson correlation analysis and moving average method are used to analyze the characteristics of precipitation in Zhengzhou from 1973 to 2020 from the Total amount, intensity and duration of precision. The results show that during this period, the average annual precision in Zhengzhou was 660 mm, and the top three years were 2003, 2016 and 1983. The annual average precipitation intensity in Zhengzhou is 3.12 mm/d, And the linear tendentiousness trends of heavy rain and torrential rain are -0.0008 d/a and -0.005 d/a respectfully. The above research in this paper can provide reference for the urban response plan and long-term construction planning under extreme precipitation conditions.
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