云南山地野火分布空间格局探讨

Discussion on the Spatial Distribution Patterns of Wildfirein Yunnan Mountains

以2016~2019年云南省NPP/VIIRS火点数据集为数据源,对火点数据从归一化植被指数(NDVI)、土地利用、置信度三方面剔除异常值,并以标准差椭圆方法对处理后火点进行了火点分布方向格局分析。结果表明:①云南省2016~2019年火点发生具有明显空间动态性,逐年变化;②火点分布趋势主要在滇东南、滇南一带,以及滇中地区的昆明安宁等区域方向上,应该加强对这些区域林火的科学防控。

Taking the NPP/VIIRS fire data set of Yunnan Province from 2016 to 2019 as the data source,the outliers of the fire data are excluded from the normalized vegetation index(NDVI),land use and confidence.The fire distribution direction pattern was analyzed by using standard deviation ellipse method.The results show that:①The occurrence of fires in Yunnan Province from 2016 to 2019 has obvious spatial dynamics and changes year by year;②The distribution trend of fires is mainly in the areas of southeastern and southern Yunnan,and Kunming and Anning in central Yunnan.The scientific prevention and control of forest fires in these areas should be strengthened.