Flammability of litter sampled according to two different methods: comparison of results in laboratory experiments
Flammability of litter sampled according to two different methods: comparison of results in laboratory experiments
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DOI：
10.1071/wf13045
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发表时间：
2014-01-01
影响因子：
3.1
通讯作者：
Borgniet, Laurent
中科院分区：
文献类型：
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作者：
Ganteaume, Anne;Jappiot, Marielle;Borgniet, Laurent
在实验室中，不同类型的垃圾样品（构造与完整）可用于可燃性实验，但这些垃圾的采样方法可能会影响垃圾可燃性结果。为了评估这一影响，垃圾样品收集在法国东南部，根据两种不同的方法，以前在其他研究中使用，一个保持完整的结构的垃圾层（非构造垃圾）和其他需要的垃圾的建设，主要使用表面垃圾层（构造垃圾）。可燃性结果的比较表明，采样方法对凋落物的容重、扩散速率和消耗速率有显著影响，完整凋落物比人工压实的重建凋落物更易燃。植被的类型有一个显着的影响凋落物的深度，可燃性，可持续性，消费性和可燃性（除了传播速度）和凋落物的组成可以部分解释这种火灾行为。凋落物的可燃性参数及其大小的建设的影响也不同，根据植被类型。完整的凋落物结构似乎是其可燃性，特别是可燃性和消耗性的重要驱动因素。当使用构造的枯枝落叶样本而不是完整的枯枝落叶样本时，对这些易燃性成分的评估会有所不同，特别是根据植被类型。未来对凋落物可燃性的研究应考虑到由于凋落物取样方法的偏差时，凋落物构建。
In the laboratory, different types of litter samples (constructed v. intact) can be used in flammability experiments but the sampling method of these litters could affect litter flammability results. To assess this effect, samples of litters were collected in South-eastern France, according to two different methods previously used in other studies, one keeping intact the structure of the litter layers (non-constructed litter) and the other requiring the construction of the litter, using mainly the surface litter layer (constructed litter). The comparison of flammability results showed that the sampling method had a significant effect on litter bulk-density, rate of spread and rate of consumption, intact litter being more flammable than reconstructed litter that was artificially compacted. The type of vegetation had a significant effect on litter depth, ignitability, sustainability, consumability and combustibility (except on rate of spread) and the litter composition could explain in part this fire behaviour. The effect of the construction of litters on flammability parameters and its magnitude also differed according to vegetation types. Intact litter structure appeared to be an important driver of its flammability, especially of combustibility and consumability. The assessment of these flammability components will differ when using constructed litter samples instead of intact litter samples, especially according to vegetation types. Future research on litter flammability should take into account the bias due to the litter sampling method when the litter is constructed.