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Field test of a rate-of-fire-spread model in slash fuels

Author(s): James K. Brown
Year Published: 1972

Predicted rates of fire spread using a mathematical model were consistently greater but in reasonably close agreement with rates observed on test fires in ponderosa pine and Douglas-fir slash. Fuel loading, bulk density, particle density, particle surface-to-volume ratio, heat content, total plant salt content, silica-free salt, fuel moisture, and wind velocity were determined as input variables for the test on plots containing slash with and without needles, and at two loadings and three depths. Fuel discontinuities and inadequate knowledge of fuel moisture contents that limit ignition are discussed as the primary reasons for the deviations. One-half of the total fuel weight loss in the flame front was accounted for by particles less than 1 cm. in diameter. A multiple regression for predicting flame length is provided.

Citation: Brown, James K. 1972. Field test of a rate-of-fire-spread model in slash fuels. Res. Pap. INT-RP-116. Ogden, UT: USDA Forest Service, Intermountain Forest and Range Experiment Station. 24 p.
Topic(s): Fire Behavior, Data Evaluation or Data Analysis for Fire Modeling, Simulation Modeling
Ecosystem(s): Montane dry mixed-conifer forest, Ponderosa pine woodland/savanna
Document Type: Technical Report or White Paper
NRFSN number: 11945
FRAMES RCS number: 14075
Record updated: Jun 14, 2018