SPATIAL AND TEMPORAL DYNAMICS OF LAND USE AND NORMALIZED DIFFERENCE VEGETATION INDEX EM SETOR DE CABECEIRA DO RIO SAO LOURENCO, CAMPO VERDE, MT

• Published in: Ra'e ga no. 33; p. 94
• Main Authors: Candido, Anny Keli Aparecida Alves, Silva, Normandes Matos da, Barbosa, Domingos Savio
• Format: Journal Article
• Language: Spanish
• Published: Editora da UFPR 01.04.2015
• ISSN: 1516-4136

There was an analysis of spatial and temporal dynamics of land use over a period of 26 years in the watershed located in headwaters of Sao Lourenco River, located in the Cerrado biome. The images used to conduct the study were obtained by the sensor Thematic Mapper (TM) Landsat 5, referred to path/row 226/71 of the years 1985, 1997 and 2011, with a spatial resolution of 30 meters. The land use map was generated from supervised classification using Maximum Likelihood algorithm. The Normalized Difference Vegetation Index (NDVI) was generated from 4 and 3 bands corresponding to the near infrared and red, respectively. It was verified that over 78% of the watershed area is intended to agriculture. The forest class increased over the years analyzed, which is explained by the plantation of eucalyptus forest in the northern part of the watershed. The NDVI showed areas with little biomass, differing them from areas with dense vegetation cover. By analyzing the NDVI of an area in the process of environmental recovery, called ecological restoration demonstration unit, it was noted that in nine months of implantation, the area still does not show spectral features that are similar to the riparian forest. The riparian forests of the watershed represent potential dispersal corridors of biological flow, which connect the upland areas located in the Cerrado to the lowlands of Pantanal, located in the southwest of Mato Grosso. The research provides grant for environmental adaptation of the rural properties along with the relevant environmental legislation. Keywords: Environmental Planning; Recovery of Degraded Areas; Remote Sensing. Avaliou-se a dinamica espacial e temporal do uso do solo na microbacia que contem a nascente do Rio Sao Lourenco, situada no bioma Cerrado. Foram utilizadas imagens orbitais obtidas pelo sensor Mapeador Tematico (TM) do Landsat 5, referentes a orbita/ponto 226/71 dos anos de 1985, 1997 e 2011, com resolucao espacial de 30 metros, compreendendo um periodo de 26 anos. O mapa de uso das terras foi gerado a partir de classificacao supervisionada, utilizando o algoritmo Maximo Verossimilhanca. O Indice de vegetacao por diferenca normalizada (NDVI) foi gerado a partir das bandas 4 e 3 correspondentes ao infravermelho proximo e ao vermelho, respectivamente. Verificou-se que mais de 78% da area da microbacia e destinada a agricultura. A classe floresta aumentou no decorrer dos anos analisados, fato este explicado pelo plantio de floresta de eucalipto, no setor norte da microbacia. O NDVI evidenciou areas que estavam com pouca biomassa vegetal, diferenciando-as das areas com cobertura vegetal densa. Considerando o NDVI de uma area em processo de recuperacao ambiental, denominada de unidade demonstrativa de restauracao ecologica, observouse que com nove meses de implantacao, a mesma ainda nao apresenta resposta espectral semelhante a mata ciliar adjacente. As matas ciliares da microbacia representam potenciais corredores de dispersao de fluxo biologico, que conectam areas de planalto situadas no bioma Cerrado a planicie sedimentar do Pantanal situada no sudoeste de Mato Grosso. A pesquisa fornece subsidios para a adequacao ambiental das propriedades rurais junto a legislacao ambiental pertinente. Palavras-chave: Planejamento Ambiental, Recuperacao de Areas Degradadas, Sensoriamento remoto.