Fire intensity reported by Byram (1959) was originally and still is, to some extent, expressed in British thermal units per second per foot, (Btu/(s.ft)). The recommended International System (SI) units are kilowatts per metre (kW/m) (Van Wagner 1978). Fire intensity in kilowatts per metre is now used widely by forest fire researchers in Canada (e.g., Van Wagner 1977a; Stocks and Alexander 1980) and Australia (e.g.,Luke and McArthur 1978; Cheney 198 l), and is receiving
greater use in the United States (e.g., Nelson and Ward 1980; Rothermel and Deeming 1980).
Fire intensity reported by Byram (1959) was originally and still is, to some extent, expressed in British thermal units per second per foot, (Btu/(s.ft)). The recommended International System (SI) units are kilowatts per metre (kW/m) (Van Wagner 1978). Fire intensity in kilowatts per metre is now used widely by forest fire researchers in Canada (e.g., Van Wagner 1977a; Stocks and Alexander 1980) and Australia (e.g.,Luke and McArthur 1978; Cheney 198 l), and is receivinggreater use in the United States (e.g., Nelson and Ward 1980; Rothermel and Deeming 1980).
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