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Relationships between the moisture content of fine woody fuels in lodgepole pine slash and the fine fuel moisture code of the canadian forest fire weather index system



Relationships between the moisture content of fine woody fuels in lodgepole pine slash and the fine fuel moisture code of the canadian forest fire weather index system



Canadian Journal of Forest Research 18(1): 128-131



Unsuccessful attempts to ignite slash resulting from the mechanical knocking down of lodgepole pine [Pinus contorta] in west central British Columbia led to a short-term investigation of the relationship between the Fine Fuel Moisture Code of the Canadian Forest Fire Weather Index System and the moisture content of various fine fuel components < 1 cm in diameter. Of the types of fuel sampled, the moisture contents of B.C. Forest Service fuel moisture sticks and aged slash were similar to, and well correlated (r = 0.79 and 0.81, respectively) with, the equivalent moisture content calculated from the Fine Fuel Moisture Code. The Fine Fuel Moisture Code was not designed to relate to the moisture content of uncured fuels. Thus, the moisture contents of fresh living slash (material from knocked down trees still attached to living roots) and of fresh dead slash (material unattached to living trees that had not yet experienced a complete fire season in which to fully cure) were poorly correlated with moisture content (r = 0.16 and 0.42, respectively). The moisture content of the progressively curing, needle-bearing fresh dead slash was relatively high at the beginning of the fire season, but became similar to the moisture content during the first half of July. This suggests that the Fine Fuel Moisture Code can also be used to preduct the moisture content of such fine slash after these fuels have cured for approximately 3 months during the snow-free period.

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Accession: 006303029

Download citation: RISBibTeXText

DOI: 10.1139/x88-019


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