摘要
以云南省昆明市妥吉林区为研究地点,分析了箐沟内的植物类型、影响森林火灾的气象要素,使用定性和定量方法,对箐沟的阻火机理进行了研究,结果表明:防火关键期内,沟内温度比沟上低,不易达到可燃物的着火点;沟内相对湿度比沟上的大,火环境发生了变化,火蔓延到沟内可能变;沟内的风速比沟上的小,使火蔓延减缓;箐沟内以海桐花科昆明海桐为主的常绿阔叶树已郁闭成林,发生火灾的可能性小,也有一定的阻火能力。
The study was conducted in Tuoji Forest Area of Kunming City in Yunnan Province.The type of plants,meteorological elements and fire barrier were analyzed in the lower parts of gullies.Forest fires were affected by them.The laboratory tests were carried out.Qualitative and quantitative methods were used.The mechanism of fire retardation was studied in the lower parts of gullies.Result shows that:in the fire prevention period,the temperature of the lower parts of gullies is lower than the upper part.It is not easy to reach the ignition point of the fuel.Water flow rate is 0.5m·s-1 in mountain gullies.The relative humidity of the lower parts of gullies is higher than that of the upper part.There were moss ferns.The fire environment changed in mountain gullies.The fire spread to the lower parts of gullies may be smaller or it could go out naturally.The wind speed of the lower parts of gullies is lower than the upper part.The fuel of the lower parts of gullies slow down the fire spread or it could go out in a certain enclose space.Evergreen deciduous trees of mainly Pittosporum have closed into a forest in the lower parts of gullies.There is little chance of fire.It has certain fire resistance ability.
作者
闫想想
王秋华
李晓娜
李世友
仝艳民
Yan Xiangxiang;Wang Qiuhua;Li Xiaona;Li Shiyou;Tong Yanmin(Southwest Forestry university,Kunming 650224,China;Yunnan Institute of Biodiversity,Southwest Forestry University,Kunming 650224,China)
出处
《防护林科技》
2018年第10期21-23,33,共4页
Protection Forest Science and Technology
基金
国家自然科学基金项目(31660210)
关键词
火环境
集水区
林火阻隔
箐沟
昆明
environment of fire
catchment area
fire barrier
mountain gullies
Kunming City
