关键词: 雷电, 农村雷电灾害, 防御关键技术, 应用示范

Abstract: To improve the level of rural lightning disaster prevention science and technology as the goal, the lightning disasters were analysed in Hunan province. Key technical indexes and comprehensive technical methods for rural lightning disaster prevention had been established. National mandatory standards had been developed and issued. And the application and demonstration of comprehensive lightning disaster prevention technology had been successfully carried out. The following innovative results were obtained： ①The national standard for the lower limit of lightning strike frequency of rural residential lightning protection buildings and the corresponding key points of design and construction technology were determined; ②The symmetrical unequal spacing quadrupole method was proposed as the preferred method to measure the soil resistivity and a patent was applied, which can better reflect the actual stratification of natural soil and was more stable and more accurate; ③The distribution map of soil resistivity in Changsha region was drawn, and the analysis software was developed. It was found that the soil resistivity value was significantly positively correlated with precipitation; ④Integrated lightning protection facilities construction technologies, such as simulation trees, emergency shelters and single rural residential lightning protection facilities were used to create a regional protection system for thunderstorm path interception, and a new all-round and three-dimensional regional lightning protection and disaster reduction model in rural Hunan province was established.

Key words: lightning, rural lightning disaster, defense key technology, application demonstration