| 樟子松针叶床层结构对失水过程中含水率参数的影响 |
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| 引用本文： | 金森,陈鹏宇.樟子松针叶床层结构对失水过程中含水率参数的影响[J].林业科学,2011,47(4). |
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| 作者姓名： | 金森 陈鹏宇 |
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| 作者单位： | 东北林业大学林学院,哈尔滨,150040 |
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| 基金项目： | 国家自然科学基金项目(30771743); 中央高校基本科研业务费专项资金(DL09CA15); 林业公益性行业科研专项200804002 |
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| 摘 要： | 以樟子松针叶床层为例,初步研究可燃物结构床层结构特征对其失水过程中时滞和平衡含水率参数(基于Nelson模型)的影响。通过对15个不同厚度、载量、密度的樟子松可燃物床层的失水过程的分析,估计这些床层的时滞和平衡含水率参数,利用这些参数进行可燃物含水率模拟的平均绝对误差和均方根误差均不超过0.01,所估计的可燃物含水率参数有效。对可燃物床层结构特征对这些参数的影响的研究表明,可燃物床层厚度和载量对时滞和平衡含水率的2个参数a、b具有有显著影响,与时滞和平衡含水率参数b正相关,与平衡含水率参数a负相关,据此建立可燃物含水率参数的预测模型。该模型高估了时滞和平衡含水率参数b,低估了平衡含水率参数a。所得结果还有一些不确定性,特别是可燃物结构特征对平衡含水率参数的影响,需要在更宽的温湿度范围内、针对其他平衡含水率模型和在失水吸水2个过程上进一步研究。
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| 关 键 词： | 可燃物 含水率 时滞 平衡含水率 结构 樟子松 |
Effects of Structure Features of Fuelbed Composed of Scots Pine Needles on Equilibrium Moisture Content Parameters during Desorption Process |
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| Jin Sen,Chen Pengyu.Effects of Structure Features of Fuelbed Composed of Scots Pine Needles on Equilibrium Moisture Content Parameters during Desorption Process[J].Scientia Silvae Sinicae,2011,47(4). |
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| Authors: | Jin Sen Chen Pengyu |
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| Institution: | Jin Sen Chen Pengyu (College of Forestry,Northeast Forestry University Harbin 150040) |
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| Abstract: | Prediction of fuel moisture content based timelag and equilibrium moisture content is a accurate method,which is commonly employed in the American National Fire Danger Rating System and the Canadian Forest Fire Danger Rating System.The timelag and equilibrium moisture content constants vary with fuel types and structure.A preliminary study was conducted on the effects of fuelbed structure features on these parameters in desorption process of fuelbeds composed of Scots pine needles.The results indicated that... |
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| Keywords: | fuel moisture content timelag equilibrium moisture content Scots Pine structure |
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