武汉至广州高速铁路湖北段沿线雷电活动分析

利用湖北省地面雷暴日资料和闪电定位监测资料，采取数理统计方法，对武汉至广州高速铁路湖北段沿线雷电活动进行分析。结果表明：其沿线一年四季均有雷暴发生，且处在湖北省闪电高密度区；夏季平均雷暴日最多，冬季平均雷暴日最少，4-8月闪电次数占全年闪电总次数的91.5%，为闪电集中发生期；一天中闪电次数集中出现在15-19时，也是对流性雷电天气集中发生期和雷电防御关键时段；咸宁北站一带闪电密度最大，雷电活动较频繁，是雷电防御重点地段。

Analysis of lightning activity along the Wuhan-Guangzhou high-speed rail line in the section of Hubei province

Based on surface thunderstorm days and data collected by lightning detection network in Hubei, in this paper we discuss the lightning activities along the Wuhan-Guangzhou high-speed rail line in the section of Hubei province by using statistical analysis. The results indicate that thunderstorms occur frequently in the Hubei section along the railway line all year round, and the rail line is situated in the high lightning density zone of Hubei. The averaged number of thunderstorm days is the highest in summer, and the lowest in winter. The number of lightning days from April to August accounts for 91.5%of the annual total, indicating that this is the intensive lightning period. During a day, most of the lightning happen from 15 pm to 19 pm, when convective lightning weather occurs frequently, which make it the key period for lightning protection. The area centered the Xianning station has the highest lightning density, the most frequent lightning activities, and there-fore, is the most important area for lightning protection.