建昌县1998—2018年夏季暴雨特征分析

利用建昌县国家基本站1998—2018年6—8月降水量和暴雨出现日数的观测资料,采用统计学方法及对比分析,对建昌县夏季降水量、暴雨量、暴雨出现日数、暴雨预警发布等变化特征进行了分析。结果表明,2018年夏季降水量较历年偏多,出现2次暴雨,1998—2017年建昌县夏季降水量有明显的年际变化特征,夏季暴雨量和降水总量波动频率基本一致,夏季暴雨量偏多的年份降水总量也偏多。2015—2018年年均发布暴雨预警信号25次,7月发布预警信号最多,橙色预警信号发布最多。

Characteristics of Summer Rainstorm in Jianchang County from 1998 to 2018

Based on the observed data of precipitation and rainstorm days from June to August during 1998-2018 at the national basic weather station of Jianchang County, the characteristics of summer precipitation, rainstorm amount, rainstorm days, rainstorm warning and release in Jianchang County were analyzed by statistical methods and comparative analysis. The results showed that the precipitation in summer of 2018 was more than that in previous years, and there were two rainstorms. The summer precipitation in Jianchang County from 1998 to 2017 had obvious interannual variation characteristics. The fluctuation frequencies of summer rainstorm and total precipitation were basically the same. From 2015 to 2018, 25 rainstorm warning signals were issued annually, the most were issued in July and the orange warning signal was released most frequently.