Analysis of the environmental factors in forest wildfires i Aznalcollar and Sierra Bermeja

摘要

Different natural factors make the Mediterranean ecosystme specially vulnerable to forest wildfires: the weather, with extremely long dry summers; the strong winds, which dry the soil and vegetation and spread the fire once it has begun; the abrupt topography and finally, the human factor. In late spring, May 30 to June 4 in 1995, a wildfire broke burning an area of 1800 ha called "El Maronalejo" (Sevilla). this area is characterized for his rough topography, with deep narrow valleys. One month and half later, an area of 1500 ha of forest was burnt in Sierra Bermeja, (Malaga). The development of temeprature and vegetation index maps from the daily NOAA-AVHRR sensor databases, and the synoptical meteorological maps analysis, enable the study of increase in themperature and the NDVI decrease of the previous days and during the fire, as well as the climatic conditions of those dates.