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    Author(s): Palaiologos Palaiologou; Alan A. Ager; Cody R. Evers; Max Nielsen-Pincus; Michelle A. DayHaiganoush K. Preisler
    Date: 2019
    Source: Natural Hazards and Earth System Sciences. 19(8): 1755-1777.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (2.0 MB)

    Description

    We report a fine-scale assessment of cross-boundary wildfire events for the western US. We used simulation modeling to quantify the extent of fire exchange among major federal, state, and private land tenures and mapped locations where fire ignitions can potentially affect populated places. We examined how parcel size affects wildfire transmission and partitioned the relative amounts of transmitted fire between human and natural ignitions. We estimated that 85% of the total predicted wildfire activity, as measured by area burned, originates from four land tenures (Forest Service, Bureau of Land Management, private, and state lands) and 63% of the total amount results from natural versus human ignitions. On average, one-third of the area burned by predicted wildfires was nonlocal, meaning that the source ignition was on a different land tenure. Land tenures with smaller parcels tended to receive more incoming fire on a proportional basis, while the largest fires were generated from ignitions in national parks, national forests, and public and tribal lands. Among the 11 western states, the amount and pattern of cross-boundary fire varied substantially in terms of which land tenures were mostly exposed, by whom, and to what extent.We also found spatial variability in terms of community exposure among states, and more than half of the predicted structure exposure was caused by ignitions on private lands or within the wildland-urban interface areas. This study addressed gaps in existing wildfire risk assessments that do not explicitly consider cross-boundary fire transmission and do not identify the source of fire. The results can be used by state, federal, and local fire planning organizations to help improve risk mitigation programs.

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    Citation

    Palaiologou, Palaiologos; Ager, Alan A.; Evers, Cody R.; Nielsen-Pincus, Max; Day, Michelle A.; Preisler, Haiganoush K. 2019. Fine-scale assessment of cross-boundary wildfire events in the western United States. Natural Hazards and Earth System Sciences. 19(8): 1755-1777.

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    Keywords

    cross-boundary wildfire, fine-scale assessment, modeling, risk mitigation

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