昆明森林可燃物燃烧机理研究  

Study on Combustion Mechanism of Forest Fuelin Kunming

作　　者：张运生 陈锋[3] 刘柯珍[2] 闫德民 ZHANG Yun-sheng;CHEN Feng;LIU Ke-zhen;YAN De-min(Institute of Forest Ecology,Environment and Nature Conservation,Chinese Academy of Forestry,Beijing 100091,China;Nanjing Forest Police College,Nanjing Jiangsu 210023,China;School of Ecology and Nature Conservation,Beijing Forestry University,Beijing 100083)

机构地区：[1]中国林业科学研究院森林生态环境与自然保护研究所,北京100091 [2]南京森林警察学院,江苏南京210023 [3]北京林业大学生态与自然保护学院,北京100083

出　　处：《林业机械与木工设备》2022年第5期54-56,67,共4页Forestry Machinery & Woodworking Equipment

基　　金：国家自然科学基金项目(31901321);中国民用航空局安全能力建设项目(民航局合同[2021]143号);民航警务研究中心项目(205432024)。

摘　　要：森林可燃物是森林火灾的物质基础,其含水率与林火发生和蔓延密切相关。鲜枝、鲜叶含水率的高低反映了树冠火蔓延的指标,而枯枝、枯叶含水率反映了地表可燃物的易燃性指标,以及火灾发生的概率和地表火的蔓延因素。通过数据分析发现,桉树、冲天柏、灯台树、华山松、桤木、银荆、圆柏、云南松、藏柏9个树种的鲜叶、鲜枝、枯叶、枯枝的相对含水率和绝对含水率逐渐降低,而草本植物紫茎泽兰不同状态的相对含水率和绝对含水率则不同,为鲜叶>鲜枝>枯枝>枯叶;圆柏、藏柏、紫茎泽兰鲜叶含水率较低,圆柏、冲天柏鲜枝含水率较低,发生火灾后易引发树冠火且蔓延较快。Forest fuel is the material basis of forest fire,and its moisture content is closely related to the occurrence and spread of forest fire.The moisture content of fresh branches and leaves reflects the index of canopy fire spread,while dead branches and leaves reflect the flammability of surface fuel,the probability of fire occurrence and the spreading factor of surface fire.Through data analysis,relative moisture content and absolute moisture content of fresh leaves,fresh branches,dead leaves,dead branches of 9 tree species including eucalyptus robusta,cupressus duclouxiana,bothrocaryum controversum,pinus armandii,alnus cremastogyne,acacia dealbata,sabina chinensis,pinus yunnanensis,cupressus torulosa,and tectona grandis gradually decreased.Relative water content and absolute water content of eupatorium adenophorum in descending order:fresh leaves>fresh branches>dead branches>branch leaves;The moisture content of fresh leaves of sabina chinensis,cupressus torulosa and eupatorium adenophorum was lower than that of others,the moisture content of fresh branches of sabina chinensis and cupressus duclouxiana was lower,which easily triggered crown fire and spread quickly after fire.

关 键 词：森林可燃物 相对含水率 绝对含水率 

分 类 号：S762[农业科学—森林保护学]