ANÁLISE DA COBERTURA DO SOLO NA REGIÃO DO RIO PARDO, RS, COM BASE EM IMAGENS ESPECTRAIS DO MAPEADOR TEMÁTICO DO LANDSAT 5
Abstract
Este trabalho teve por objetivo determinar o balanço de radiação à superfície com base nas sete bandas espectrais do Mapeador Temático do Landsat 5. Duas imagens da região do município do Rio Pardo, RS, para os dias 16/08/1988 e 16/03/2008, foram processadas utilizando-se Surface Energy Balance Algorithm for Land (SEBAL). Amostras das áreas com vegetação nativa, solo exposto, água superficial e parte da área urbana da área de estudo foram utilizadas na diferenciação dos pixels. Foram obtidos para cada data analisada o albedo e o Índice de Vegetação da Diferença Normalizada (IVDN), com base na radiância dos canais reflectivos (1, 2, 3, 4, 5 e 7), bem como a temperatura de cada pixel com o canal termal (6) do Landsat 5 – TM. Os resultados indicaram que o saldo de radiação em 1998 atingiu o valor médio de 370 W m-2, no horário da passagem do satélite, bastante inferior daquele encontrado para 2008, que foi de 510 W m-2. A cobertura vegetal da superfície predominante na área de estudo é do tipo vegetação rala, ocupando um pouco mais de 700 km2 da área territorial durante as datas analisadas.Downloads
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Copyright (c) 2021 Madson Tavares Silva, Stephanny C. F. do E. Costa, Armando de S. Santos, Alessandro F. dos Santos

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