Factors affecting fuel break effectiveness in the control of large fires on the Los Padres National Forest, California

International Journal of Wildland Fire
By: , and 

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Abstract

As wildfires have increased in frequency and extent, so have the number of homes developed in the wildland-urban interface. In California, the predominant approach to mitigating fire risk is construction of fuel breaks, but there has been little empirical study of their role in controlling large fires.We constructed a spatial database of fuel breaks on the Los Padres National Forest in southern California to better understand characteristics of fuel breaks that affect the behaviour of large fires and to map where fires and fuel breaks most commonly intersect. We evaluated whether fires stopped or crossed over fuel breaks over a 28-year period and compared the outcomes with physical characteristics of the sites, weather and firefighting activities during the fire event. Many fuel breaks never intersected fires, but others intersected several, primarily in historically fire-prone areas. Fires stopped at fuel breaks 46% of the time, almost invariably owing to fire suppression activities. Firefighter access to treatments, smaller fires and longer fuel breaks were significant direct influences, and younger vegetation and fuel break maintenance indirectly improved the outcome by facilitating firefighter access. This study illustrates the importance of strategic location of fuel breaks because they have been most effective where they provided access for firefighting activities.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Factors affecting fuel break effectiveness in the control of large fires on the Los Padres National Forest, California
Series title International Journal of Wildland Fire
DOI 10.1071/WF10065
Volume 20
Issue 6
Year Published 2011
Language English
Publisher International Association of Wildland Fire
Publisher location Australia
Contributing office(s) Western Ecological Research Center
Description 12 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title International Journal of Wildland Fire
First page 764
Last page 775
Country United States
State California
Other Geospatial Los Padres National Forest