摘要
蔓延速度是反映林火行为的重要指标之一,森林可燃物的混合比例、载量和地形坡度等对林火蔓延速度都具有非常重要的影响。通过室内点烧试验,分析可燃物混合比例、载量及坡度对油松、辽东栎凋落可燃物火烧蔓延速度的影响。结果表明;(1)可燃物火烧蔓延速度的变化范围在0.17~2.85m min^(-1)之间。(2)载量对蔓延速度有极显著影响,载量越大,蔓延速度越快;(3)坡度对火蔓延速度有显著影响,并呈显著正相关关系;(4)可燃物的针阔混合比例对火蔓延速度无显著影响,随着可燃物中针叶比例的增大,可燃点烧蔓延速度有加快的趋势。
The spread speed is an important index to study the forest fire behavior,and the mixed ratio of forest fuel,load and slope have a very important impact on the spread speed.In this study,the effects of mixing ratio,load and slope on spread speed of fallen leaves of Pinus tabulaeformis and Quercus wutaishanica were analyzed by indoor burn test.Result shows that:(1)In this burning test,the spread speed of varies is from0.17to2.85m min-1;(2)The load has a very significant impact on spread speed.The greater the load,the faster the spread speed.(3)The slope has a significant influence on spread speed,and has a significant positive correlation;(4)The flammable mixing ratio have no significant effect on spread speed,but under certain conditions,it shows that with the increase of the mixing ratio,the rate of spread is accelerating.
作者
乔虹
白晋华
南宏伟
李东昌
李浩培
郭晋平
Qiao Hong;Bai Jinhua;Nan Hongwei;Li Dongchang;Li Haopei;Guo Jinping(College of Forestry,Shanxi Agricultural University,Jinzhong 030801,China)
出处
《防护林科技》
2018年第1期6-8,共3页
Protection Forest Science and Technology
基金
国家自然科学基金(31470630)
山西农业大学引进人才博士科研启动费项目(2013YJ17)
关键词
点烧
蔓延速度
油松
辽东栎
凋落叶
混合比例
载量
坡度
forest fire
spreading speed
Pinus Tabulaeformis
Quercus wutaishanica
fallen leaves
mixing ratio
load
slope
