摘要
在云南省新平县照壁山云南松纯林分布区域设置样地,通过外业调查、采样,在实验室燃烧床内用热电偶等测定火行为,包括点着时间、熄灭时间、辐射热、火焰高度、长度和火强度等。结果表明,云南松纯林地表可燃物的含水率低于10%,容易被引燃。无论是上坡火还是下坡火,火焰高度都在70 cm以下,阴燃时间都未超过4 min,火强度都低于370 kW/m,热辐射在7.21 kW/m^2左右,烧除率低于60%,属于低强度火。上坡火比下坡火的最高温度高,维持和达到最高温度的时间较短,变化对比较显著。
A sample plot was set up in the continuous distribution area of pure Pinus Yunnanensis Franch in Zhaobi mountain,Xinping county,central Yunnan province.Fire behaviors,including ignition time,extinguish time,radiant heat,flame height,length and fire intensity,were measured by field investigation,sampling and laboratory test by thermocouple in the combustion bed.The results showed that the moisture content of surface combustibles in pure forest of Pinus Yunnanensis is less than 10%,which is easy to be ignited.For fire behavior of surface fuel of pure Pinus Yunnanensis Franch forest,either fire of uphill or downhill,flame height is less than 70 cm,fire intensity is less than 370 kW/m,thermal radiation is about 7.21 kW/m^2,the burn rate is less than 60%.It belongs to the low intensity burning.The maximum temperature of uphill fire is higher than that of downhill fire.The time of maintaining and reaching the maximum temperature is shorter and the change is more obvious.
作者
闫想想
王秋华
李晓娜
龙腾腾
普俊
丁宗达
韩永涛
李世友
YAN Xiang-xiang;WANG Qiu-hua;LI Xiao-na;LONG Teng-teng;PU Jun;DING Zong-da;HAN Yong-tao;LI Shi-you(Faculty of Fire Engineering,Southwest Forestry University,Yunnan Kunming 650224,China;School of Geography,Southwest Forestry University,Yunnan Kunming 650224,China;Forestry Bureau in Xinping County Yuxi City,Yunnan Yuxi 653400,China)
出处
《消防科学与技术》
CAS
北大核心
2019年第8期1078-1081,共4页
Fire Science and Technology
基金
国家自然科学基金资助项目(31660210)
关键词
地表可燃物
云南松
火强度
烧损率
火焰
surface fuel
Pinus Yunnanensis Franch
fire intensity
burning rate
flame
