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André Rodrigues, Domingos Xavier Viegas, Miguel Almeida, Carlos Ribeiro, Jorge R. Raposo, Jorge André
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Cataloging Information

Fire Behavior
Extreme Fire Behavior
Fire Safety Zones

NRFSN number: 25778
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An experimental study at a laboratory scale that aims to compare the fire behaviour in two configurations: a regular flat slope and a slope with an embedded canyon. In configurations of slope with an embedded canyon, a rapid increase in the rate of spread and intensity of the fire is noticed when the fire enters the canyon. So, in this study we aimed better understand the situations that occurred in some fatal accidents (Olival Novo and S. Marcos accidents, Portugal). The tests show that the presence of the canyon induces a change in fire behaviour on the slope after the fire enters the canyon. Usually, a rapid increase in the intensity and rate of spread of the fire is observed, in comparison to the regular flat slope case. It was realized that the orientation of the maximum rate of spread of fire is not coincident with the orientation of maximum slope in the case of the slope with canyon, showing that the canyon changes the fire behaviour in the slope. The results of this study contribute to a better understanding of fire behaviour on slopes with and without canyon, thus improving fire safety.


Rodrigues A, Viegas DX, Almeida M, Ribeiro C, Raposo J, André J. 2023. Fire propagating laterally over a slope with and without an embedded canyon, Fire Safety Journal Volume 138, July 2023, 103791.

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