These outputs include several variables relevant to carbon accounting and quantification, such as estimations of carbon stores for different fuelbeds, carbon flux from fire (before/after carbon estimations), and carbon emissions. The FFT suite of tools uses fuels data classified into fuelbeds to predict a suite of outputs related to prescribed and wildland fire. Revised versions of the Fire Weather Index System were issued in 19.Fuel & Fire Tools (FFT) Overview & Applicabilityįuel and Fire Tools (FFT) is a software application that integrates several fire management tools, including the Fuel Characteristics Classification System (FCCS - version 4.0), Consume (version 5.0), Fire Emission Production Simulator (FEPS - version 2.0), Pile Calculator, and Digital Photo Series into a single user interface.įuelbeds vary widely in their physical attributes, potential fire behavior, and fire effects. The development of the Fire Weather Index, the concepts behind it, and its mathematical structure are described in this paper. Its components are determined every day from noon weather readings: temperature, relative humidity, wind speed, and rain (if any). The FWI System refers primarily to a standard pine fuel type but is useful as a general measure of forest fire danger in Canada. The system consists of six components: three primary subindexes representing fuel moisture, two intermediate subindexes representing rate of spread and fuel consumption, and a final index representing fire intensity as energy output rate per unit length of fire front. The FWI is based on the moisture content of three classes of forest fuel plus the effect of wind on fire behavior. The best features of the former fire danger index were incorporated in the FWI, and a link was preserved between old and new. The Canadian Forest Fire Weather Index (FWI) System was first issued in 1970 after several years' work by a number of fire researchers in the Canadian Forestry Service.

Series: Forestry Technical Report (CFS - Ottawa)Īvailability: Order paper copy (free), PDF (download)

Canadian Forestry Service, Headquarters, Ottawa.

Development and structure of the Canadian Forest Fire Weather Index System.

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