摘要
通过室内模拟点烧试验,研究呼中国家级自然保护区主要可燃物类型地下火燃烧特征以及不同含水率和可燃物类型对燃烧峰值温度和蔓延速率的影响.结果表明:主要可燃物类型的地下火燃烧温度较高,最高可达713.99℃,蔓延速率缓慢,最快仅为25.45 cm/h,且随深度的波动较大;不同可燃物类型和含水率的交互作用对地下火燃烧峰值温度和蔓延速率的影响都存在显著差异(P<0.05);杜香-兴安落叶松林和偃松-兴安落叶松林的燃烧温度高;在含水率10%下,杜香-兴安落叶松林蔓延速率最快;杜鹃-兴安落叶松林燃烧温度低,燃烧过程缓慢;草类-兴安落叶松林在较高含水率下蔓延速率加快.
Through the indoor simulated ignition experiment,the combustion characteristics of underground fires with main fuel types in Huzhong National Nature Reserve and the effects of different moisture contents and fuel types on the peak combustion temperature and spread rate were studied.The results showed that the combustion temperature of underground fire with main fuel types is high,up to 713.99℃,and the spread rate is slow,the fastest is only 25.45 cm/h,and fluctuates greatly with depth.There are significant differences in the effects of the interaction of different fuel types and moisture contents on the peak temperature and spread rate of underground fire(P<0.05).The combustion temperatures of Ledum palustre-Larix gmelinii forest and Pinus pumila-Larix gmelinii forest are high.When the moisture content is 10%,the spreading rate of Ledum palustre-Larix gmelinii forest is the fastest.The combustion temperature of Rhododendron dauricum-Larix gmelinii forest is low and the combustion process is slow.Under the condition of higher moisture content,the spreading rate of grass-Larix gmelinii forest is accelerated.
作者
单延龙
王明霞
于渤
王晓迪
李威
赵凤君
高博
SHAN Yanlong;WANG Mingxia;YU Bo;WANG Xiaodi;LI Wei;ZHAO Fengjun;GAO Bo(Forestry College of Beihua University,Jilin 132013,China;Dunhua Forestry Limited Company,Dunhua 133714,China;Forest Fire Prevention Early Warning Monitoring Command Center of Jilin Province,Changchun 130022,China;Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China;Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Beijing 100091,China)
出处
《北华大学学报（自然科学版）》
CAS
2022年第6期815-823,共9页
Journal of Beihua University（Natural Science）
基金
国家自然科学基金项目(31971669)
中国林科院中央级公益性科研院所基本科研业务费专项资金资助项目(CAFYBB2021ZB001)
国家林业和草原局“森林雷击火防控应急科技项目”(202101).
关键词
森林地下火
燃烧特征
含水率
影响因素
forest underground fire
combustion characteristics
moisture content
influence factor
