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Revista chilena de historia natural

Print version ISSN 0716-078X


NAVARRO CERRILLO, RAFAEL M et al. Characteristics of areas affected by fire in 2005 at Parque Nacional de Torres del Paine (Chile) as assessed from multispectral images. Rev. chil. hist. nat. [online]. 2008, vol.81, n.1, pp.95-110. ISSN 0716-078X.

The use of remote sensors is one of the most important aspects in the study of large fires for an assessment of their severity, as well as the application of the results to the restoration process. This work has studied the application of images from the Landsat ETM + ASTER sensors in order to evaluate the prior vegetation, the surface burned and the damage caused by a fire occurring in 2005 in the National Park of Torres del Paine (Chile). The results obtained indicate that the delta NBR index is reasonably versatile for evaluating the affected surface, in this case estimated at 17.138 ha, as well as the damage severity (Reliability = 81.5 %; k = 0.73). In addition, the suitability of using Landsat ETM+ images to improve the quality of maps of vegetation prior to the fire (Reliability = 79.5 %; k = 0.75.) has been confirmed. It has been possible to apply a combination of this information to assist in the restoration of the fire-affected area. However, the results have also shown some limitations in the sensors, particularly in the definition of ecosystems with small and/or fragmented surface representations, which suggests that the use of sensors with a greater spatial resolution could improve the final cartographic products, and, therefore, the quality of the restoration works

Keywords : incendios forestales; vegetación patagónica; severidad; Normalized Burn Ratio; forest fires; Patagonian vegetation; severity; Normalized Burn Ratio.

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