Derivation of the 1- and 10-hour timelag fuel moisture calculations for fire-danger rating
Fosberg, M.A. ; Deeming, J.E.
Procedures for calculating the moisture contents of 1- and 10-hour timelag fuels have been developed based on theoretical calculations of the rate of moisture transport in wood. The 1-hour timelag calculation is superior to fine fuel moisture calculations developed previously because there is no regional bias, making it valid over a wider range of conditions, and because it separates out the effects of the environmental factors of temperature, humidity, and solar radiation. The 10-hour timelag calculation produced values reasonably consistent with observations obtained from 1/2-inch ponderosa pine fuel sticks exposed under field conditions.
Fosberg, M. A., and J. E. Deeming. 1971. Derivation of the 1- and 10-hour timelag fuel moisture calculations for fire-danger rating. Research Note RM-207. Fort Collins, CO, USDA Forest Service, Rocky Mountain Forest and Range Experiment Station.
abstract okay; climatology; fine fuels; fire behavior; fire danger rating; fire management planning; fire models; fire weather; forest management; fuel management; fuel models; fuel moisture; fuel types; fuels; humidity; moisture; Pinus ponderosa; radiation; rate of spread; temperature; weather observations
Administration; Climate; Fire Behavior; Fuels; Hazard and Risk; Models; Planning; Weather
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August 21, 2015
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