Numerical investigation of aggregated fuel spatial pattern impacts on fire behavior

Parsons, Russell A.; Linn, Rodman Ray; Pimont, Francois; Hoffman, Chad; Sauer, Jeremy; Winterkamp, Judith; Sieg, Carolyn H.; Jolly, W. Matt

doi:10.3390/land6020043

Title: Numerical investigation of aggregated fuel spatial pattern impacts on fire behavior

Journal Article · Sun Jun 18 00:00:00 EDT 2017 · Land

DOI:https://doi.org/10.3390/land6020043· OSTI ID:1369208

Parsons, Russell A. ^[1];

^[2]; Pimont, Francois ^[3]; Hoffman, Chad ^[4]; Sauer, Jeremy ^[5]; Winterkamp, Judith ^[2]; Sieg, Carolyn H. ^[6]; Jolly, W. Matt ^[1]

U.S. Forest Service, Missoula, MT (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Ecologie des Forets Mediterraneennes, Avignon Cedex 9 (France)
Colorado State Univ., Fort Collins, CO (United States)
National Center for Atmospheric Research, Boulder, CO (United States)
U.S. Forest Service, Flagstaff, AZ (United States)

Here, landscape heterogeneity shapes species distributions, interactions, and fluctuations. Historically, in dry forest ecosystems, low canopy cover and heterogeneous fuel patterns often moderated disturbances like fire. Over the last century, however, increases in canopy cover and more homogeneous patterns have contributed to altered fire regimes with higher fire severity. Fire management strategies emphasize increasing within-stand heterogeneity with aggregated fuel patterns to alter potential fire behavior. Yet, little is known about how such patterns may affect fire behavior, or how sensitive fire behavior changes from fuel patterns are to winds and canopy cover. Here, we used a physics-based fire behavior model, FIRETEC, to explore the impacts of spatially aggregated fuel patterns on the mean and variability of stand-level fire behavior, and to test sensitivity of these effects to wind and canopy cover. Qualitative and quantitative approaches suggest that spatial fuel patterns can significantly affect fire behavior. Based on our results we propose three hypotheses: (1) aggregated spatial fuel patterns primarily affect fire behavior by increasing variability; (2) this variability should increase with spatial scale of aggregation; and (3) fire behavior sensitivity to spatial pattern effects should be more pronounced under moderate wind and fuel conditions.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDA Forest Service; USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1369208

Report Number(s):: LA-UR-17-23015

Journal Information:: Land, Vol. 6, Issue 2; ISSN 2073-445X

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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54 ENVIRONMENTAL SCIENCES
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Title: Numerical investigation of aggregated fuel spatial pattern impacts on fire behavior

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