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Open AccessArticle

Measuring Initial Attack Suppression Effectiveness through Burn Probability

1
Parks Canada, Kootenay National Park Operations Centre, Radium Hot Springs, BC V0A 1M0, Canada
2
Northern Forestry Centre, Canadian Forest Service, Natural Resources Canada, Edmonton, AB T6H 3S5, Canada
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USDA Forest Service, Pacific Northwest Research Station, Wenatchee Forestry Sciences Lab, Wenatchee, WA 98801, USA
4
Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN 37830, USA
*
Author to whom correspondence should be addressed.
Received: 3 November 2019 / Revised: 27 November 2019 / Accepted: 5 December 2019 / Published: 7 December 2019
Most wildfires in North America are quickly extinguished during initial attack (IA), the first phase of suppression. While rates of success are high, it is not clear how much IA suppression reduces annual fire risk across landscapes. This study introduces a method of estimating IA effectiveness by pairing burn probability (BP) analysis with containment probability calculations based on initial fire intensity, spread rate, and crew response time. The method was demonstrated on a study area in Kootenay National Park, Canada by comparing burn probabilities with and without modeled IA suppression. Results produced landscape-level analyses of three variables: burn probability, suppression effectiveness, and conditional escape probability. Overall, IA reduced mean study area BP by 78% as compared to a no-suppression scenario, but the primary finding was marked spatial heterogeneity. IA was most effective in recently burned areas (86% reduction), whereas mature, contiguous fuels moderated its influence (50%). Suppression was least effective in the designated wildfire exclusion zone, suggesting supplementary management approaches may be appropriate. While the framework includes assumptions about IA containment, results offer new insight into emergent risk patterns and how management strategies alter them. Managers can adopt these methods to anticipate, quantify, and compare fine-scale policy outcomes. View Full-Text
Keywords: wildfire suppression; initial attack; burn probability; fire intensity; risk analysis wildfire suppression; initial attack; burn probability; fire intensity; risk analysis
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MDPI and ACS Style

Reimer, J.; Thompson, D.K.; Povak, N. Measuring Initial Attack Suppression Effectiveness through Burn Probability. Fire 2019, 2, 60.

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