青岛市城阳区强降水极端气候阈值研究

根据青岛市城阳区2008—2015年汛期(6—9月)日降水量资料,采用简单插值法、经验插值法、Z指数变换法、平方根变换法和立方根变换法等5种计算阈值的方法,比较分析得到适用于城阳区的阈值确定方法,并计算分析了精细化的城阳区极端降水阈值。结果表明,5种方法中,Z指数变换法更适于城阳区实际情况;城阳区极端降水阈值的分布大致呈南部阈值偏大、中部阈值偏小、北部的棘洪滩阈值也偏大。

Study on Threshold of Extreme Climate of Heavy Rainfall in Chengyang District of Qingdao

According to the daily precipitation data in the flood season (June-September) in Chengyang District of Qingdao City from 2008 to 2015,the threshold method of simple interpolation method,empirical interpolation method,Z index transformation method,square root transformation method and cubic root transformation method were used to calculate the threshold value,threshold determination method of Chengyang District was compared and analyzed,and the extreme precipitation threshold of Chengyang District was calculated and analyzed.The results showed that the Z index transformation method was more suitable for the actual situation in Chengyang District.The distribution of extreme precipitation thresholds in the Chengyang District was roughly larger than the southern threshold,the central threshold was too small and the threshold of the spike flood in the north was too large.