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Fine-Scale Fire Spread in Pine Straw

by 1,2, 1,2, 3 and 1,2,*,†
Department of Scientific Computing, Florida State University, Tallahasse, FL 32306, USA
Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, FL 32306, USA
Tall Timbers Research Station, 13093 Henry Beadel Road, Tallahassee, FL 32312, USA
Author to whom correspondence should be addressed.
Current address: 400 Dirac Science Library, Tallahassee, FL 32306, USA.
Academic Editor: Alexander I. Filkov
Received: 20 August 2021 / Revised: 28 September 2021 / Accepted: 4 October 2021 / Published: 10 October 2021
Most wildland and prescribed fire spread occurs through ground fuels, and the rate of spread (RoS) in such environments is often summarized with empirical models that assume uniform environmental conditions and produce a unique RoS. On the other hand, representing the effects of local, small-scale variations of fuel and wind experienced in the field is challenging and, for landscape-scale models, impractical. Moreover, the level of uncertainty associated with characterizing RoS and flame dynamics in the presence of turbulent flow demonstrates the need for further understanding of fire dynamics at small scales in realistic settings. This work describes adapted computer vision techniques used to form fine-scale measurements of the spatially and temporally varying RoS in a natural setting. These algorithms are applied to infrared and visible images of a small-scale prescribed burn of a quasi-homogeneous pine needle bed under stationary wind conditions. A large number of distinct fire front displacements are then used statistically to analyze the fire spread. We find that the fine-scale forward RoS is characterized by an exponential distribution, suggesting a model for fire spread as a random process at this scale. View Full-Text
Keywords: prescribed fire; infrared; computer vision; optical flow; rate of spread; stochastic prescribed fire; infrared; computer vision; optical flow; rate of spread; stochastic
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MDPI and ACS Style

Sagel, D.; Speer, K.; Pokswinski, S.; Quaife, B. Fine-Scale Fire Spread in Pine Straw. Fire 2021, 4, 69.

AMA Style

Sagel D, Speer K, Pokswinski S, Quaife B. Fine-Scale Fire Spread in Pine Straw. Fire. 2021; 4(4):69.

Chicago/Turabian Style

Sagel, Daryn, Kevin Speer, Scott Pokswinski, and Bryan Quaife. 2021. "Fine-Scale Fire Spread in Pine Straw" Fire 4, no. 4: 69.

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