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疏伐对北京西山油松林可燃物特征及潜在火行为影响

宋洁 朱敏 刘晓东 任云卯 王奇峰 金莹杉

宋洁, 朱敏, 刘晓东, 任云卯, 王奇峰, 金莹杉. 疏伐对北京西山油松林可燃物特征及潜在火行为影响[J]. 北京林业大学学报, 2017, 39(5): 41-47. doi: 10.13332/j.1000-1522.20160353
引用本文: 宋洁, 朱敏, 刘晓东, 任云卯, 王奇峰, 金莹杉. 疏伐对北京西山油松林可燃物特征及潜在火行为影响[J]. 北京林业大学学报, 2017, 39(5): 41-47. doi: 10.13332/j.1000-1522.20160353
SONG Jie, ZHU Min, LIU Xiao-dong, REN Yun-mao, WANG Qi-feng, JIN Ying-shan. Effects of thinning on fuel characteristics and potential fire behaviors of Pinus tabuliformis forest in Beijing West Mountain[J]. Journal of Beijing Forestry University, 2017, 39(5): 41-47. doi: 10.13332/j.1000-1522.20160353
Citation: SONG Jie, ZHU Min, LIU Xiao-dong, REN Yun-mao, WANG Qi-feng, JIN Ying-shan. Effects of thinning on fuel characteristics and potential fire behaviors of Pinus tabuliformis forest in Beijing West Mountain[J]. Journal of Beijing Forestry University, 2017, 39(5): 41-47. doi: 10.13332/j.1000-1522.20160353

疏伐对北京西山油松林可燃物特征及潜在火行为影响

doi: 10.13332/j.1000-1522.20160353
基金项目: 

国家自然科学基金项目 31270696

详细信息
    作者简介:

    宋洁。主要研究方向:森林防火。Email:1046304287@qq.com  地址:100083  北京市海淀区清华东路35号北京林业大学林学院

    责任作者:

    刘晓东,副教授。主要研究方向:生态学。Email: xd_liu@bjfu.edu.cn   地址:同上

  • 中图分类号: S762.1

Effects of thinning on fuel characteristics and potential fire behaviors of Pinus tabuliformis forest in Beijing West Mountain

  • 摘要: 本研究在北京西山林场选择不同疏伐强度油松林,疏伐强度分别是未疏伐林分(CK)、低强度疏伐15%(L)、中强度疏伐35%(M)、高强度疏伐50%(H)。通过野外样地调查和室内试验,研究不同疏伐强度对林分可燃物载量及分布特征影响;应用BehavePlus林火软件,研究不同林分潜在火行为特征。结果表明:1)油松林地表可燃物载量随疏伐强度加大而增加,即H>M>L>CK;2)各林分可燃物负荷量垂直分布均以0~2 m层最大,随着高度的增加呈现减少的趋势;3)不同疏伐强度对林分潜在火行为指标(火蔓延速率、火线强度、火焰高度及单位面积发热量)影响显著,趋势为L>CK>M>H。研究结果可为研究地区的森林可燃物管理提供科学依据。

     

  • 图  1  不同种类地表可燃物负荷量比较

    Figure  1.  Comparison in fuel loads under different types of surface (mean ± standard error)

    图  2  不同疏伐强度油松林可燃物垂直分布情况

    Figure  2.  Fuel loading vertical distribution in fuel loading of Pinus tabuliformis stands under different thinning intensities

    表  1  油松林疏伐强度基本特征

    Table  1.   Basic characteristics of Pinus tabuliformis stands with different thinning intensities

    疏伐强度
    Thinning intensity
    海拔
    Altitude/m
    林龄
    Forest
    age/a
    坡度
    Slope
    degree/(°)
    坡向
    Slope
    aspect
    平均胸径
    Average
    DBH/cm
    平均高度
    Average
    height/m
    密度/(株·hm-2)
    Density/
    (plant·ha-1)
    郁闭度
    Canopy
    density
    CK 309 32 25 N 12.7 8.6 1 359 0.90
    L 312 32 27 N 13.9 9.1 1 159 0.85
    M 325 32 25 N 16.1 7.3 901 0.65
    H 302 32 22 N 14.5 6.2 717 0.50
    注:CK为空白对照;L为疏伐强度15%;M为疏伐强度35%;H为疏伐强度50%。下同。Notes: CK, control; L, thinning intensity is 15%; M, thinning intensity is 35%; H, thinning intensity is 50%. The same below.
    下载: 导出CSV

    表  2  不同疏伐强度油松林不同种类地表可燃物载量

    Table  2.   Surface fuel load and types of Pinus tabuliformis stands with different thinning intensities

    kg·m-2
    疏伐强度
    Thinning intensity
    1 h时滞
    1-hour time lag
    10 h时滞
    10-hour time lag
    100 h时滞
    100-hour time lag
    草本层
    Herb layer
    灌木层
    Shrub layer
    地表可燃物总和
    Total surface fuel
    CK 0.479 9±0.152 1 0.301 4±0.038 1 0.108 7±0.026 0 0.076 8±0.004 0 1.576 2±0.464 9 1.360 8±0.879 5
    L 0.502 6±0.116 5 0.192 8±0.037 5 0.078 6±0.009 6 0.104 0±0.005 8 1.712 6±0.341 9 1.306 2±0.964 6
    M 0.446 5±0.022 0 0.433 1±0.043 0 0.254 9±0.013 5 0.143 2±0.010 4 2.542 8±0.407 1 1.913 4±0.949 7
    H 0.265 8±0.073 5 0.208 2±0.031 8 0.171 3±0.014 9 0.173 7±0.014 5 3.278 5±0.552 2 1.638 6±1.388 0
    下载: 导出CSV

    表  3  油松林不同疏伐强度地表火行为指标

    Table  3.   Fire behavior indicators of Pinus tabuliformis stands with different thinning intensities

    项目Item CK L M H
    火蔓延速率Speed of fire propagation/(m·min-1) 4.8 5.7 2.4 0.3
    火线强度Fire line intensity/(kW·m-1) 1 697 2 570 31 9
    火焰高度flame height/m 2.4 2.9 0.4 0.1
    单位面积发热量Heat per unit area/(kJ·m-2) 25 876 27 018 4 009 589
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-11-24
  • 修回日期:  2017-01-13
  • 刊出日期:  2017-05-01

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