摘要
利用伊春市1953—2006年的森林火灾历史资料,对该区林火时空分布特点进行了分析,并探讨了气象因素与火灾发生的关系。结果表明:森林火灾次数、面积随时间的持续呈下降趋势,进入20世纪80年代,伊春市实现连续22年(1981—2002年)没有发生重特大森林火灾;但进入21世纪,森林火灾次数、面积明显增加。利用相关性分析表明,年平均相对湿度及年降水与林火发生次数相关性较大。雷击火发生次数与年度气象因子相关性不明显,而与雷击火多发月(5—6月)平均相对湿度相关性较为显著。
Statistics data of forest fires from 1953 to 2006 in Yichun City were used to analyze the spatial and tempo-ral distribution .The relationship of the meteorological element the fire was discussed .Result shows that ：the frequency the areas of the forest fire appear downward trend .No serious fire disaster occurred from 1981 to 2002 .The forest fire frequency burned area increase significantly in the 21 century .The correlation analysis shows that the average relative humidity and precipitation are correlated with the forest fire frequency .Lightning fire occurrence have no obvious correlation with the annual meteorological factors .The average relative humidity from May to June is correlated with the lighting forest fire frequency .
出处
《防护林科技》
2014年第6期48-50,62,共4页
Protection Forest Science and Technology
关键词
林火
气象因子
相关分析
伊春林区
forest fires
meteorological factors
correlation analysis
Yichun forest zone
