Fuel bulk density and fuel moisture content effects on fire rate of spread: a comparison between FIRETEC model predictions and experimental results in shrub fuels
2012
Marino, Eva | Dupuy, Jean-Luc | Pimont, François | Guijarro, Mercedes | Hernando, Carmen | Linn, Rodman | Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria = National Institute for Agricultural and Food Research and Technology (INIA) | Ecologie des Forêts Méditerranéennes (URFM) ; Institut National de la Recherche Agronomique (INRA) | Los Alamos National Laboratory (LANL) | National Institute for Agricultural Research (INIA) from the Spanish Ministry of Science and Innovation; European Commission [FIRE PARADOX FP6-018505]
International audience
Afficher plus [+] Moins [-]anglais. Fuel bulk density and fuel moisture content effects on fire rate of spread were assessed in shrub fuels, comparing experimental data observed in outdoor wind tunnel burns and predictions from the physically-based model FIRETEC. Statistical models for the combined effects of bulk density and fuel moisture content were fitted to both the experimental and the simulated rate of spread values using non-linear regression techniques. Results confirmed a significant decreasing effect of bulk density on rate of spread in a power law in both laboratory burns and simulations. However, experimental data showed a lesser effect than simulations, suggesting a difference in the effective drag. Fuel moisture content effect was highly consistent, showing a similar exponential relationship with rate of spread in laboratory and in simulations. FIRETEC simulations showed similar orders of magnitude with predictions of two field-based empirical models, finding a significant correlation between rate of spread values. The study confirms the efficacy of the combined approach through experimental data and simulations to study fire behaviour.
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