河池市闪电活动与下垫面植被类型关系分析

Analysis of the relationship between lightning activity and vegetation forms on underlying surface in Hechi

基于河池市2010年1月～2017年12月的闪电定位资料和地表植被数据、高程数据,分析闪电密度、强度分布与不同下垫面的关系。结果表明:河池市闪电密度与草地、居民建设用地面积呈正相关,与林地面积呈负相关;河池市闪电强度与水域地、林地面积呈正相关,与草地、居民建设用地面积呈负相关。各个植被类型上的闪电日变化呈现"双峰"型,其中居民建设用地的闪电日变化波动剧烈,林地的午后闪电变化呈现较均匀的波动增加。林地上的闪电密度值随海拔高度增加而减小,闪电强度随海拔高度增加而增大。

Based on the lightning location data,vegetation data and elevation data of Hechi City from January 2010 to December 2017,the relationships between lightning density,intensity distribution and different underlying surfaces were analyzed. The results show that lightning intensity is positively correlated with grassland and residential construction land area,and negatively correlated with forest land area. Lightning intensity in Hechi is positively correlated with water area and forest area,and negatively correlated with grassland and residential construction land area. In addition,the diurnal variation of lightning in each vegetation form presents a "double peak" type. The daily variation of residential construction land fluctuates violently while the afternoon lightning variation in forest land presents a more uniform fluctuation increase. The lightning density decreases with the increase of altitude,and the lightning intensity increases with the increase of altitude.