Risk Mapping of Fires in Vegetation in the Serra Do Brigadeiro State Park (Mg) and Surroundings

Abstract

-The aim of this study is to analyze the factors that affect the occurrence of fires in the vegetation, in the area of the Serra do Brigadeiro State Park (PESB) and its surroundings, and through this information to establish the most appropriate methodology to generate a risk map for fires in the place. A risk cartogram for fires was developed with the help of the ArcGIS 10.1 software, by the generation of maps of slope, aspects and land use. These maps were intercrossed, enabling the determination of the areas most susceptible to fires. Tested methodologies varied in the form of assigning grades to each predictor class of fire as well as in the division of risk classes. According to the results, the assignment of notes to each predictor class, depending on the size of the burned area and taking into account the history of events, reflected the risk of fires in vegetation in the region more satisfactorily.Keywords: Map; Fire; GIS. MAPEAMENTO DO RISCO DE INCÊNDIOS EM VEGETAÇÃO NO PARQUE ESTADUAL DA SERRA DO BRIGADEIRO (MG) E ARREDORESRESUMO -O objetivo deste estudo foi analisar os fatores que condicionam as ocorrências de incêndios em vegetação na área do Parque Estadual da Serra do Brigadeiro (PESB) e arredores, e através destas informações estabelecer a metodologia mais adequada para a geração de um mapa de risco de incêndios para o local. A elaboração do cartograma de risco de incêndios foi feita a partir do software ArcGIS 10.1, com a geração dos mapas de declividade, exposição das vertentes e de uso e cobertura do solo. Estes mapas foram intercruzados, possibilitando a determinação das áreas mais suscetíveis aos incêndios. As metodologias testadas variaram a forma de atribuição de notas para cada classe de previsão de incêndios, bem como a delimitação das classes de risco. De acordo com os resultados, a atribuição das notas de cada classe de previsão, em função do tamanho de sua área queimada, ou seja, levando-se em conta o histórico das ocorrências, refletiu mais satisfatoriamente o risco de incêndios em vegetação na região.Palavras-chave: Mapa; Fogo; SIG. 2Revista Árvore. 2017;41(4):e410409Torres FTP et al.

Susceptibility to wildfire in a conservation unit located in the transition region of Cerrado and Atlantic Forest Biomes, Brazil

“…Similar to this research, with the same method and variables for preparing the ignition, propagation and fire risk maps, TORRES et al (2017a;2017b) compared the methods based on multicriteria analysis and the history of burned areas (polygonal area) in the Serra of Brigadeiro State Park (SBSP) and in the municipality of Viçosa, in Minas Gerais state, and noted that the occurrence history had better efficiency in the Conservation Unit and multicriteria analysis in the municipality. In the Himalayan region of Bhutan (TSHERING et al, 2020), the prediction by models based on the AHP method and frequency rate was compared and, the second method, respectively, obtained greater efficiency.…”

“…In conservation units in the Brazilian territory (AGUIAR et al, 2015;SOARES NETO et al, 2016;TORRES et al, 2016;2017b) the anthropic presence decisively influences the occurrence of wildfire. Despite this, the high density of roads and trails in and near the parks, as it is the case of the SGNP, can facilitate the suppression of fires by brigade members, as well as serve as curbs to prevent the spread of fire on the surface.…”

“…The spatial models are based on different approaches and probabilistic statistical algorithms, such as the most advanced ones, based on machine learning, whose use has been growing since 2000 and obtaining extremely high accuracy (SAYAD; MOUSANNIF; MOATASSIME, 2019), but also simpler and more easily reproducible models, such as by weighting fire occurrences (TORRES et al, 2017b) and multicriteria analyzes (POURGHASEMI; BEHESHTIRAD; PRADHAN, 2016;MOAYEDI et al, 2020).…”

Fire danger in the supply areas of hydroelectric reservoirs under the restoration process in the south of Minas Gerais, Brazil

“…Beyond the influence of slope, the Aspect modulates the desiccation rates of fuel moisture, thereby increasing ignition susceptibility and facilitating the propagation of fire. In the Southern Hemisphere, north-facing slopes, which receive the most solar energy, are the most susceptible to fire occurrences, followed by west, east, and south-facing slopes (Torres et al, 2017a). The topography of the study area predominantly aligns in a north-south direction, explaining the prevalence of west and east-facing slopes.…”

“…The delineation of regions highly vulnerable and temporal windows where an ignition source is likely to initiate and propagate a fire significantly enhances the precision of preventive, detection, and suppression strategies in wildfires (Torres et al, 2018). These strategies can be tailored to specify the exact location, optimal timing, and effective intervention methods (Torres et al, 2017a).…”