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Evaluating regression model estimates of canopy fuel stratum characteristics in four crown fire-prone fuel types in western North America

Author(s): Miguel G. Cruz, Martin E. Alexander
Year Published: 2012
Description:

Two evaluations were undertaken of the regression equations developed by M. Cruz, M. Alexander and R. Wakimoto (2003, International Journal of Wildland Fire 12, 39-50) for estimating canopy fuel stratum characteristics from stand structure variables for four broad coniferous forest fuel types found in western North America. The first evaluation involved a random selection of 10 stands each from the four datasets used in the original study. These were in turn subjected to two simulated thinning regimes (i.e. 25 and 50% basal area removal). The second evaluation involved a completely independent dataset for ponderosa pine consisting of 16 stands sampled by T. Keyser and F. Smith (2010, Forest Science 56, 156-165). Evaluation statistics were comparable for the thinning scenarios and independent evaluations. Mean absolute percentage errors varied between 13.8 and 41.3% for canopy base height, 5.3 and 67.9% for canopy fuel load, and 20.7 and 71% for canopy bulk density. Bias errors were negligible. The results of both evaluations clearly show that the stand-level models of Cruz et al. (2003) used for estimating canopy base height, canopy fuel load and canopy bulk density in the assessment of crown fire potential are, considering their simplicity, quite robust.

Citation: Cruz, Miguel G.; Alexander, Martin E. 2012. Evaluating regression model estimates of canopy fuel stratum characteristics in four crown fire-prone fuel types in western North America. International Journal of Wildland Fire. 21(2): 168-179.
Topic(s): Fire Behavior, Data Evaluation or Data Analysis for Fire Modeling
Ecosystem(s): Montane wet mixed-conifer forest, Montane dry mixed-conifer forest, Ponderosa pine woodland/savanna
Document Type: Book or Chapter or Journal Article
NRFSN number: 8312
FRAMES RCS number: 11861
Record updated: Jun 14, 2018