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Europhysics Letters PREPRINT

By Percolation In Real Wildfires, Guido Caldarelli, Raffaella Frondoni, Andrea Gabrielli, Marco Montuori, Rebecca Retzlaff and Carlo Ricotta


PACS. 89.75.Fb – Structures and organization in complex systems. Abstract. – This paper focuses on the statistical properties of wild-land fires and, in particular, investigates if spread dynamics relates to simple invasion model. The fractal dimension and lacunarity of three fire scars classified from satellite imagery are analysed. Results indicate that the burned clusters behave similarly to percolation clusters on boundaries and look more dense in their core. We show that Dynamical Percolation reproduces this behaviour and can help to describe the fire evolution. By mapping fire dynamics onto the percolation models the strategies for fire control might be improved. In recent times the introduction of satellite imaging facilitated the coarse-scale analysis of wildfires [1]. Being inspired by the self-similar aspect of the fire scars, we want here to provide an explanation for this lack of characteristic length scale. We want to link wildfires spreading with the evolution of diffusive systems whose scale invariance has been widely analyzed [2]. In particular we focus here on the simplest example of fractal growth model, the model of percolation [3]. Percolation has been extensively studied, and it proved to be extremely successful in explaining some of the statistical properties of several propagation phenomen

Year: 2001
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