Skip to Main Content
A model of gas mixing into single-entrance tree cavities during wildland firesAuthor(s): A.S. Bova; G. Bohrer; Matthew Dickinson
Source: Canadian Journal of Forest Research. 40: 1659-1670.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: View PDF (975.26 KB)
DescriptionThe level of protection to fauna provided by tree cavities during wildland fires is not well understood. Here we present a model for estimating the transport of combustion gases into cylindrical, single-entrance cavities during exposures caused by different wildland fire scenarios. In these shelters, the entrance occurs near the top of the cavity. This empirical model was developed from a suite of numerical experiments using the National Institute of Standards and Technology's Fire Dynamics Simulator, which spanned a range of entrance diameters, wind speeds, gas temperatures, and vertical angles of incidence. To evaluate the model's predictions, it was used to replicate, with great accuracy, a time series of carbon monoxide (CO) concentrations in a controlled experiment where a fabricated cylindrical cavity was exposed to combustion products. The time constant for cavity filling is proportional to the ratio of cavity volume to entrance area. Hot gases lead to significant stratification within the cavity during exposures. To demonstrate the model's potential use in predicting faunal exposures in the context of land management, we show that the model can be used to estimate dosage within red-cockaded woodpecker (Picoides borealis Vieillot, 1809) cavities without requiring temporally detailed, local measurements of wind speed and combustion product concentrations.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationBova, A.S.; Bohrer, G.; Dickinson, M.B. 2011. A model of gas mixing into single-entrance tree cavities during wildland fires. Canadian Journal of Forest Research. 40: 1659-1670.
- Red-cockaded woodpeckers vs rat snakes: the effectiveness of the resin barrier
- Competition for red-cockaded woodpecker roost and nest cavities: effects of resin age and entrance diameter
- The response of adult red-cockaded woodpeckers to a fallen nestling
XML: View XML