In order to reveal the distribution characteristics and occurrence patterns of lightning disasters,scientifically and effectively guide disaster prevention and reduction work,the statistical data of lightning disasters and lightning lo-cation monitoring data in Ningbo Zhenhai district from 2010 to 2022 were used.Mathematical statistics and GIS geo-graphic information technology were used to analyze and study the spatiotemporal distribution characteristics of light-ning disasters and ground lightning activities in the jurisdiction,in order to provide important scientific reference for the lightning prevention and reduction work in the jurisdiction.Research shows that from 2010 to 2022,a total of 91 lightning disasters occurred in Zhenhai District,with a frequency of 21 130 ground flashes;There is no simple corre-sponding relationship among the number of annual lightning disasters,thunderstorm days,and ground lightning fre-quency,and there is no rule to follow between them;The monthly variation is relatively consistent,showing a clear single peak distribution,reaching its peak in July,and all indicators have slightly increased in November;The num-ber of lightning accidents from June to September accounted for 82.42%of the year,direct economic losses accounted for 94.67%,and ground flash frequency accounted for 94.90%.The number of thunderstorms and the monthly changes in direct economic losses are closely related to ground flash activity;The lightning disaster is characterized by a scat-tered distribution of points,which overlaps with the high value area of ground lightning density in the central region to a certain extent.The average ground lightning density is 3.56 times/(a·km2),and the maximum value is 9.59 times/(a·km2);The main type is negative ground lightning,with the highest probability of 10-20 kA lightning current reaching 31.16%.The concentration of positive ground lightning intensity amplitude distribution is relatively low,and the cumulative probability of lightning current above 80 kA is slightly higher than negative ground lightning.In terms of industry distribution,agriculture,forestry,animal husbandry,and fishing(agricultural household appliances)are the most severely affected,accounting for 52.75%.Rural areas and advanced manufacturing industries should focus on lightning protection.The research results aim to provide reference basis for various departments in the jurisdiction to promote lightning disaster prevention management and improve lightning disaster prevention technology.
lightning disasterground flashfeatures analysisNingbo Zhenhai district
NETL
NSTL
万方数据
