摘要
内蒙古大兴安岭森林火灾频发,研究其季节性变化趋势及空间动态分布特征,对今后该地区森林防火期划分和防火资源的合理分配具有重要意义。利用Mann-Kendall趋势检验法、滑动t检验法对1981—2018年内蒙古大兴安岭森林火灾数据进行趋势和突变分析,使用分位数回归法研究影响森林火灾过火面积的时间与空间因素,得出内蒙古大兴安岭森林火灾在时间和空间上的动态变化特征。结果表明:内蒙古大兴安岭森林火灾整体呈先下降(1981—1999年)再上升(2000—2007年)又下降(2008—2018年)的趋势。森林火灾主要发生在春、夏、秋三季,春季森林火灾变化较复杂,波动明显,在1991年发生突变;秋季森林火灾波动较平缓,但在1994年发生突变;2004—2011年期间夏季森林火灾明显增长,火险期向夏季发生偏移和延长;冬季发生火灾较少。森林火灾过火面积与火灾持续时间呈正相关,尤其在高分位点处,正相关性更加显著。内蒙古大兴安岭森林火灾主要发生在鄂伦春自治旗等地,从空间横向动态变化来看,整体呈现由西南向东北递增的趋势;从空间纵向动态变化来看,海拔对森林火灾过火面积的影响并不显著。建议应加强内蒙古大兴安岭东北地区及春、夏两季的林火监测和防火宣传,适当调整森林防火期和防火资源时空分配,将有助于减少内蒙古大兴安岭森林火灾的发生。
Forest fires occur frequently in Daxing an Mountains of Inner Mongolia,and the study of its seasonal trend and spatial dynamic distribution characteristics of forest fires is of great significance for the division of forest fire prevention periods and the rational allocation of fire prevention resources.Mann-Kendall trend test and sliding t-test were used to analyze the trend and abrupt change of forest fire data in Daxing an Mountains of Inner Mongolia from 1981 to 2018,and the quantile regression method was used to study the spatio-temporal factors affecting the burned area and finally obtained the spatio-temporal dynamic characteristics of forest fires in Daxing an Mountains,Inner Mongolia,China.The results showed that the overall forest fires in Daxing an Mountains of Inner Mongolia had a trend of first decreasing(from 1981 to 1999),then increasing(from 2000 to 2007)and then decreasing(from 2008 to 2018).Forest fires mainly occur in spring,summer and autumn.The changes of forest fires in spring are more complex,with obvious fluctuations,and an abrupt change occurred in 1991.Forest fires in autumn fluctuated more gently,but an abrupt change occurred in 1994.Forest fires increased significantly in summer during 2004-2011,the fire risk period was shifted and extended to summer,and there were fewer fires in winter.The burned area is positively correlated with fire duration,especially at high quantile points,with significant positive correlation.Forest fires in Daxing an Mountains of Inner Mongolia mainly occurred in the Oroqen Autonomous Banner and other places.From the perspective of spatial horizontal dynamic changes,the overall trend of forest fire is increasing from southwest to northeast.From the perspective of spatial vertical dynamic changes,the impact of altitude on the burned area is not significant.The findings in this study suggest that the forest fire monitoring and fire prevention publicity should be enhanced in the northeastern Daxing an Mountains of Inner Mongolia and in the spring and summer,and p
作者
班擎宇
贾超
王悦宇博
张恒
BAN Qingyu;JIA Chao;WANG Yueyubo;ZHANG Heng(School of Forestry,Inner Mongolia Agricultural University,Hohhot 010019,China;National Field Scientific Observation and Research Station of Greater Khingan Forest Ecosystem,Genhe 022350,China;Sangganhe Poplar High-yield Forest Bureau of Shanxi,Datong 037000,China)
出处
《林业工程学报》
CSCD
北大核心
2024年第2期116-123,共8页
Journal of Forestry Engineering
基金
内蒙古自治区高校科研项目(NJZY23109)
国家自然科学基金(32060344)
内蒙古自治区高等学校青年科技英才支持计划(NJYT24042)
内蒙古农业大学双一流项目(DC2100001175)。
关键词
内蒙古大兴安岭
森林火灾
过火面积
时空分布
林火监测
防火期
Daxing an Mountains,Inner Mongolia
forest fire
burned area
spatio-temporal distribution
forest fire monitoring
fire prevention period
