摘要
采用森林火灾实例分析法,通过对2场特大森林火灾林火蔓延规律与火场热力学变化规律研究,得出主防火林带宽度S,至少应达到S≥VM*(2H/G)1/2,VM为防火林带建设处最大风速最大值,H为平均火焰高度,G为万有引力常数;利用前式计算副防火林带防火林带宽度S时,M应为防火林带建设处最大风速平均值;生物防火林带最佳结构为疏透型。
Case method was adopted to the analysis of forest fire. By investigating two extraordinary forest fires occurred in Shanxi, the spread regularities and thermodynamic variations of the forest fires were ex amined presents stant. W It was concluded that the width of the main fire belt should be at least , VM re the maximum wind speed in fire belt, H is the average height of flame, O is the gravitational con hile calculating the the width of the secondary firebreak belt,Mm should be changed into the mean value of the maximum wind speed VM. The best structure of the biological firebreak belt was the sparse structure.
出处
《西北林学院学报》
CSCD
北大核心
2013年第5期139-142,共4页
Journal of Northwest Forestry University
基金
山西省科技攻关项目(20080311011)
关键词
生物防火林带
林带有效宽度
林带结构
biological firebreak belt
effective width of forest belt
forest belt structure
