基于Landsat 8 OLI数据的地表植被覆盖类型与江西省雷电活动相关性分析

The Statistical Analysis of Correlation between the Surface Vegetation Coverage Type and the Lightning Activity in Jiangxi Based on Landsat 8 OLI Data

利用2006—2015年江西省闪电定位系统监测资料和地表植被遥感数据,通过数理统计、线性回归等方法,分析江西省不同地表植被覆盖类型的雷电活动特征分布。结果表明:1)江西省各年雷电活动最活跃区域主要在城乡建设用地、水域和未利用土地3类地表之间变化,其中发生在城乡建设用地的概率最高,闪电密度值高的区域其闪电强度相对较弱。2)江西省闪电密度随着地表覆盖度的增大而减小,而闪电平均强度随着覆盖度的增加总体呈增强的趋势。3)多雷区在城乡建设用地、水域、未利用土地和耕地所占比例较大;少雷区在草地所占比例最大,其次为林地,而城乡建设地所占比例最小。

Based on the 2006-2015 monitoring data of lightning location system in Jiangxi,the characteristics of lightning activity over different vegetation cover types in Jiangxi were analyzed by using the mathematical statistics,regression analysis and other methods.The results showed that：1）The lightning activity mainly occurred in urban and rural construction surface,waters and unutilized surfaces.The most active areas of lightning activity were urban and rural areas.The high density lightning areas always presented relative weak intensity lightning.2）The lightning density in Jiangxi decreased with the increase of surface vegetation coverage,while the average intensity of lightning increased with the increase of coverage.3）The largest proportion of the strong minefield and the multi-minefield was in urban and rural areas,next was in waters and unused areas.The largest proportion of less minefield was in grassland,next was in woodland,while the smallest proportion of less minefield was in urban and rural construction area.