摘要
Abstract
Using the precipitation data of rainstorm in Sangui County ground meteorological observation station from 1986 to 2016,the interannual and seasonal distribution characteristics of rainstorm and heavy rainstorm were analyzed,combined with the use of wavelet analysis to analyze the cyclical characteristics of rainstorm intensity,and analyze the cause of the rainstorm in Sanshui County.The results showed that the total number of rainstorms in Sanshui County in recent 31 years was 67 times,and the annual average number of rainstorms was 2.23 times.The number of rainstorms was 64 times and the heavy rainstorms was three times.In the past 31 years,the number of rainstorms in Sanshui County appeared low-high-low-low fluctuations.The number of rainstorms in the 1990s had been the largest,and that had been flat in the 1980s and after 2010.The rainstorm in Sanshui County occurred in April-September,accounting for 92.5％ of the total number of rainstorms,concentrated in May-August,the highest number of occurrences in July,the lowest in November;and the number of heavy rainstorms in Sansui County less than normal,which appeared in the summer higher frequency.The special geographical location and terrain characteristics of Sansui County were favorable to the formation and development of rainstorm.The main weather systems affecting rainstorm were high-altitude trough,low vortex,rapid current,medium-low shear,ground cold front and so on.关键词
暴雨/年际变化/季节分布/成因分析/三穗县Key words
Rainstorm/Interannual variation/Seasonal distribution/Cause analysis/Sansui County分类
农业科技
