Flood Peak and Heavy Rainfall in the Shuiyang River

The climatic characteristics of area precipitation and flood peak in Shuiyang River are analyzed using the water level and precipitation data from 1964 to 1999.The results show that in June,July and August,the average area rainfall are 241.5mm,186.5mm and 155.7mm,respectively.There are 13 and 25 times of over alerting water level in Xuancheng and in Xinhezhuang of Anhui Province,respectively.There is weekly continuous rain days before the flood peak,the weekly area precipitation is 164.5mm.Moreover,the results also show that the area precipitation within a season undergoes 60-day quasi-period,and the water level 60-and 120-day quasi-period in Xinhezhuang.And,by using the wavelet analysis,it is found that the mean daily water level in Xuancheng in 1999 undergoes 60-day quasi-period.It is consistent with that in Xinhezhuang by using the spectral analysis.

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