Avaliação dos sensores EOS/MODIS e NOAA/AVHRR na detecção e registro de incêndios e queimadas

• Autor(a) principal: Oliveira, Ana Luiza Santos de
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3045
• topic: Incêndios florestais; Calor; Sensoriamento remoto; Detectores infravermelhos; Forest fires; Heating; Remote sensing; Infrared detectors; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::CONSERVACAO DA NATUREZA

The efficiency of detection and monitoring of fire forests is fundamental for fire control and reduction of costs and damages in firefighting operations. Therefore the need for efficient methods for forest fire detection, allowing a faster action and better decision-making. Remote sensing can be a suitable tool for preventing and fighting forest fires. The objective of this work was to evaluate the efficiency of the EOS/MODIS and NOAA/AVHRR sensors in the detection and reporting of fires and burnings. Images of the product MODIS/AQUA THERMAL ANOMALIES (MYD14), from the OS/MODIS/AQUA satellite, were used to report the fire occurrences. Images of the product MODIS/AQUA VEGETATION ÍNDICES (MYD13) were used to evaluate the relationship between the fire and the probability of fire occurrence. Besides, heat focus data from NOAA/AVHRR 12 and 16 were collected in order to compare them with the obtained information from the images of the MODIS sensor. This information was compared with the forest risk calculated by the Monte Alegre (FMA) Formula to check fire occurrence and fire season. The study area involved part of Zona da Mata , Metropolitan Area of Belo Horizonte, Campo dos Vertentes and Vale do Rio Doce , in the state of Minas Gerais, between the coordinates: Latitude 1/South: 21º12'2,42 ''; Longitude 1/West: 43º36'59,65 ''; Latitude 2/South: 19º15'46,34 ''; Longitude 2/West: 41º51'10,74 '', totalizing approximately 38.372 km2. The municipality of Viçosa located in the Zona da Mata was one of the objects of this study. The results showed that the pro duct MYD14 was efficient to identify fire occurrences, providing a larger number of focuses detected in the three classes (578 for the year 2004) in relation to AVHRR/NOAA-12 and NOAA-16 (153 fires for the year 2004). The MYD 13 product was found not suitable for evaluating the fire risk due to divergences between their classes and the heat focuses detected by AVHRR/NOAA 12 and 16. The FMA index analised for the municipality of Viçosa, Belo Oriente, São Domingos do Prata, Antônio Dias e Santa Bárbara showed consistent with the largest probability of fire occurrence (July to Octobe), confirming the data from the sensor used, which showed a larger concentration of focuses from July to November, considered as a critical period in this work.