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首页> 外文期刊>International Journal of Wildland Fire >The effect of woody fuel characteristics on fuel ignition and consumption: a case study from a eucalypt forest in south-west Western Australia
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The effect of woody fuel characteristics on fuel ignition and consumption: a case study from a eucalypt forest in south-west Western Australia

机译：木质燃料特征对燃料点火和消费的影响 - 以西南西南部桉树林的案例研究

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Coarse woody debris (&0.6cm in diameter) is an important component of the fuel complex in Australian eucalypt forests, influencing both fire behaviour, smoke production and post-fire ecological processes. We investigated how physical characteristics of woody fuel affected ignition and consumption during an experimental fire where the fuel complex characteristics, fire weather and fire behaviour varied within a narrow range. Decay status, bark condition, arrangement, suspension and extent of charring were classified for 2866 coarse woody fuel particles. We used generalised linear model (GLM) analysis to explain ignition success and the extent of consumption of individual particles, with a focus on larger diameter fuels (&7.5cm in diameter), which comprised 83% of the woody fuel load and 94% of the woody fuel consumed during the flaming and smouldering stages of combustion. Ignition success was best explained by a model that included fuel arrangement (a surrogate of fuel proximity), suspension and decay status. The extent of fuel consumption was greater for pieces in advanced stages of decay, but suspension (inversely related) and arrangement (directly related) also affected the outcome. Forest management practices, previous fire history and other natural disturbances are likely to influence the distribution of pre-fire diameters and suspension classes that characterise large woody fuels at a site, and will therefore influence woody fuel consumption. This has practical implications for quantifying heat release and atmospheric emissions from fires burning in forests with different management histories.
机译：粗木质碎片（＆amp;直径0.6cm）是澳大利亚桉树林燃料综合体的重要组成部分，影响火灾行为，烟雾生产和火灾后生态过程。我们调查了木质燃料的物理特性如何在实验火灾中受到点火和消费的影响，其中燃料综合特性，火灾天气和火灾行为在狭窄范围内变化。衰减状态，树皮状况，布置，悬架和炭化的程度被分类为2866粗木质燃料颗粒。我们使用广义的线性模型（GLM）分析来解释点火成功和单个颗粒的消耗程度，聚焦较大直径燃料（直径为7.5cm），其包括83％的木质燃料负荷和在燃烧和燃烧燃烧阶段的燃烧期间消耗的94％的木质燃料。点火成功最好是由包括燃料布置（燃料接近的代理），悬架和衰减状态的模型解释。腐烂的高级阶段的零件的燃料消耗程度越大，但悬浮液（反向相关）和安排（直接相关）也影响了结果。森林管理实践，以前的火灾历史和其他自然障碍可能会影响在遗址上表征大型木质燃料的火灾前径和悬架等级的分布，因此会影响木质燃料消耗。这对于量化在森林中燃烧的燃烧和不同的管理历史中的燃烧的热释放和大气排放具有实际意义。

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