Stereovision For The Determination Of Fireline
Intensity In Vegetation Fire
Author(s)
L. Rossi, T. Molinier, P. Santoni, T. Barboni & F. Morandini
Abstract
Fireline intensity is one of the most relevant quantities in forest fire science. It
helps to evaluate the effects of fuel treatment on fire behaviour, to establish
limits for prescribed burning. It is also used as a quantitative basis to support fire
suppression activities. However, its measurement at field scale for actual fire
remains a challenge. Hence, it has been poorly used as a key quantity to test the
new generation of models of fire spread that have been developed these last ten
years. An inverse method to obtain fireline intensity is through the observation of
the flame length. This geometrical information is measured using a stereovision
system placed in the lateral position relative to the direction of the fire spread.
Algorithms were developed in order to automatically segment the fire area of the
images and estimate the 3D coordinates of salient fire points and then the flame
length. The three dimensions of the information permit to obtain the flame length
with metric measures. In the present work, we directly measure the fireline
intensity at laboratory scale by oxygen consumption calorimetry. The results are
then used to establish a relationship between fireline intensity and flame length
obtained by the stereovision system.
Keywords: stereovision, 3D coordinates, fireline intensity, flame length, oxygen
consumption calorimetry.
1 Introduction
Fires devastate regularly forests and shrublands as well as populated areas all
over the world. Foresters and fire fighters are faced with problems such as the
management of wildland/urban interfaces, the establishment of safety zones and
suppression strategies. An important concept helpful in fire mitigation and fight
is to scale fires in function of their potential threat. This scale is based on the
Keywords
stereovision, 3D coordinates, fireline intensity, flame length, oxygen
consumption calorimetry
Related Book
Other papers in this volume
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