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International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire
RESEARCH ARTICLE

Pre-fire and post-fire surface fuel and cover measurements collected in the south-eastern United States for model evaluation and development – RxCADRE 2008, 2011 and 2012

Roger D. Ottmar A D , Andrew T. Hudak B , Susan J. Prichard C , Clinton S. Wright A , Joseph C. Restaino C , Maureen C. Kennedy C and Robert E. Vihnanek A
+ Author Affiliations
- Author Affiliations

A US Forest Service, Pacific Northwest Research Station, Pacific Wildland Fire Sciences Laboratory, 400 North 34th Street, Suite 201, Seattle, WA 98103, USA.

B US Forest Service, Rocky Mountain Research Station, 1221 South Main Street, Moscow, ID 83843, USA.

C School of Environmental and Forest Sciences, University of Washington, Box 352100, Seattle, WA 98195, USA.

D Corresponding author. Email: rottmar@fs.fed.us

International Journal of Wildland Fire 25(1) 10-24 https://doi.org/10.1071/WF15092
Submitted: 13 September 2014  Accepted: 11 August 2015   Published: 13 October 2015

Abstract

A lack of independent, quality-assured data prevents scientists from effectively evaluating predictions and uncertainties in fire models used by land managers. This paper presents a summary of pre-fire and post-fire fuel, fuel moisture and surface cover fraction data that can be used for fire model evaluation and development. The data were collected in the south-eastern United States on 14 forest and 14 non-forest sample units associated with 6 small replicate and 10 large operational prescribed fires conducted during 2008, 2011, and 2012 as part of the Prescribed Fire Combustion and Atmospheric Dynamics Research Experiment (RxCADRE). Fuel loading and fuel consumption averaged 6.8 and 4.1 Mg ha–1 respectively in the forest units and 3.0 and 2.2 Mg ha–1 in the non-forest units. Post-fire white ash cover ranged from 1 to 28%. Data were used to evaluate two fuel consumption models, CONSUME and FOFEM, and to develop regression equations for predicting fuel consumption from ash cover. CONSUME and FOFEM produced similar predictions of total fuel consumption and were comparable with measured values. Simple linear models to predict pre-fire fuel loading and fuel consumption from post-fire white ash cover explained 46 and 59% of variation respectively.

Additional keywords: ash, fire effects, fuel consumption, fuel loading, longleaf pine, prescribed fire.


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