Biophysical parameters from remote sensing in semiarid region of Rio Grande do Norte state, Brazil/ Parametros biofisicos obtidos por sensoriamento remoto em regiao semiarida do estado do Rio Grande do Norte, Brasil

• Published in: Revista brasileira de engenharia agrícola e ambiental 2014-01, Vol.18 (1), p.73
• Main Authors: Bezerra, Joel M, Moura, Geber B. de A, da Silva, Bernardo B, Lopes, Pabricio M.O, Silva, Enio F. de F
• Format: Article
• Language: Spanish
• Subjects: Algorithms; Digital mapping; Earth resources technology satellites; Protection and preservation; Remote sensing
• ISSN: 1415-4366

Despite being the single Brazilian biome whose limits are restricted to the national territory, little attention has been given to the conservation of the diverse landscape of 'Caatinga'. Given the scarcity of field data to monitor the biophysical parameters of vegetation of 'Caatinga' in semiarid regions of northeastern Brazil, this study aimed to evaluate the seasonality of spatial dynamics, by means of techniques and products of Remote Sensing. The study area included the conservation unit of the National Park of the Furna Feia and its adjacencies, being situated in the municipalities of Mossoro and Barauna (RN, Brazil). Six orbital images of TM LANDSAT 5, orbit 216 and paragraph 63 taken during the period 2007 to 2010 were used. With the aid of the tool Geographic Information System algorithms were implemented with the generation of thematic maps expressing the variability of the parameters of surface albedo, Normalized Difference Vegetation Index (NDVI) and surface temperature. The results were consistent with literature data for different soil uses and climatic variations. These results demonstrate the potential of the geotechnologies for understanding the dynamics of the spatial and temporal patterns of biophysical processes of interaction soil-plant-atmosphere of the semi-arid 'Caatinga'. Key words: Landsat modeling climate change land use and occupation Apesar de ser o unico bioma brasileiro cujos limites estao restritos ao territorio nacional, pouca atencao tem sido dada a conservacao da diversificada paisagem da Caatinga. Em virtude da carencia de dados de campo para monitorar os parametros biofisicos da Caatinga em regiao semiarida do Nordeste brasileiro, este trabalho teve como objetivo avaliar a dinamica espaco-temporal por meio de tecnicas e produtos de Sensoriamento Remoto. A area de estudo compreendeu a Unidade de Conservacao do Parque Nacional da Furna Feia e suas adjacencias, situada entre os municipios de Mossoro e Barauna (RN, Brasil). Utilizaram-se seis imagens orbitais do TM LANDSAT 5, orbita 216 e ponto 63, no periodo de 2007 a 2010. Com auxilio da ferramenta Sistema de Informacao Geografica se implementaram os algoritmos com geracao das cartas tematicas expressando a variabilidade dos parametros de albedo da superficie, NDVI e temperatura de superficie. Os resultados obtidos nao so foram consistentes com dados da literatura para os diferentes usos do solo e variacoes climaticas. Alem de demonstrar o potencial das geotecnologias, a