Análise multitemporal de áreas queimadas no Parque Estadual do Lajeado em Palmas (TO)

Abstract

The Cerrado biome, for thousands of years, has had periodic fire events, which made its fauna and flora resistant to these factors. In periods of drought it is common to increase the occurrence of fires, as it is a time of water scarcity. Through remote sensing it is possible to map and analyze changes in the earth's surface caused by these events. In this scenario, this work aimed to carry out a multitemporal analysis of the burned areas in the Lajeado State Park (PEL) in Palmas - TO, between 2015 and 2020. Thus, a mapping of the burned areas in images was performed of the Landsat-8 and Resourcesat-2 satellites, through the Visual Photointerpretation of Images technique. With the areas already identified, maps of the burned areas of each year were generated, where it was possible to identify the size of the areas and visually analyze the spatial distribution. With the polygons of the burnt areas, it was possible to build a map of fire recurrences, to analyze the recurrence of these events in the same area in the analyzed period. The results of this work showed that the years 2017, 2018 and 2019 had the lowest rates of burned area, and 2015 stood out with the highest rates of burned area, and it was possible to observe throughout the study that the causes The fires in the study area are possibly the origin of Integrated Fire Management actions, burning on land with pasture and agriculture activities around the Park, and intentional or accidental burning on the sides of the highway. Regarding the results of recurrence of fires over the period analyzed, it was observed that there was a maximum of 5 recurrences in just one area, and recurrences of 3 and 4 occurred mostly in areas that have pasture activity and on the margins of the highway, being an indication of the anthropic influence on the Park.