文献类型：期刊文献

中文题名：滇中安宁地区火烧迹地光叶石栎灌木林的火行为模拟

英文题名：Simulation on Fire Behaviors of Lithocarpus mairei Shrubs in Large Forest Fire Sites in Anning, Yunnan

作者：王秋华[1] 赵凤君[2] 肖慧娟[3] 李世友[1] 刘世远[1] 杨潇[1]

第一作者：王秋华

机构：[1]西南林业大学土木工程学院/云南省森林灾害预警与控制重点实验室;[2]中国林业科学研究院森林生态环境与保护研究所/国家林业局森林保护学重点实验室;[3]西南林业大学林学院

年份：2015

卷号：0

期号：1

起止页码：105-109

中文期刊名：沈阳农业大学学报

外文期刊名：Journal of Shenyang Agricultural University

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：国家自然科学基金项目(31300553)

语种：中文

中文关键词：火焰高度;辐射热;火行为;火烧迹地;光叶石栎;安宁

外文关键词：flame height;;radiation heat;;fire behaviors;;fire sites;;Lithocarpus mairei;;Anning,Yunnan

分类号：S762.3

摘要：为评估火烧迹地灌木林再次发生火灾的可能性以及火灾发生后的危险性,在滇中安宁地区2006年"3·29"重大森林火灾火烧迹地没有人为干扰的光叶石栎过火灌木林设置样地,通过外业调查、采集样品,并在自制燃烧床内测定火行为,包括活灌木(带枝条和叶)、死灌木和粗木质残体(course woody debris,CWD)的引燃时间、熄灭时间、辐射热、火焰高度和火强度等。结果表明:活灌木的最大火焰高度为70cm,死灌木为60cm,CWD为40cm;活灌木的火强度最大,达到5251.14k W·m-1,为高强度火,是死灌木(2001.74 k W·m-1)的2.62倍,是CWD(2651.28k W·m-1)的1.98倍,死灌木和CWD都为中强度火。从实验室内小尺度模拟的火行为可见,火烧迹地上的光叶石栎灌木林仍具有很大的燃烧能量,一旦着火,很有可能释放出大量的热量,仍有可能再次发展成重大森林火灾,扑救也将会非常困难。
The evaluation was made for the possibility whether the shrubs in the fire sites would burn out again and the risk once it really happened. After selecting little man-made shrub field samples of fire sites from large forest fire burned on 29,March, 2006 in Anning, Yunan, where Lithocarpus mairei is the dominant species and its degree of dominance is a key element in behavior of fire, field investigating and lab experiments of fire behaviors, including ignite time, extinguishing time, heat values of radiation, flame height and fire intensity of live shrubs with branches and leaves, dead shrub fuel and CWD(course woody debris), the index of fire behaviors were conducted. The maximal flame height of live shrub, dead shrub fuels, and CWD were70cm, 60cm, and 40cm, respectively, while the maximal fire intensity was live fuel, which was 5251.14kW·m-1, 2.62 times as that of dead shrub(2001.74kW·m-1), and 1.98 times of that of CWD(2651.28kW·m-1). The live shrubs become the high intensive fire, while the dead shrubs and CWD were medium fires. Inferred rom small scale simulation studies on lab experiments, shrubs on fire sites still have large combustible energy, once on fire, they will release massive heat energy, possible to forma large forest fire, and with extinguishing difficulties.