delimitação de sítios ambientais homogêneos no estado do espírito santo, com base no relevo, solo e clima definition of environmental sites in espírito santo state based on relief, soil and climate

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ID: 211704
2010
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Abstract
Este trabalho teve como objetivo definir sítios ambientais homogêneos no Estado do Espírito Santo, a fim de indicar o uso potencial do solo de todo o seu território. Técnicas estatísticas multivariadas foram empregadas sobre informações do relevo, coordenadas geográficas, dados do solo e clima. A disponibilidade hídrica e a evapotranspiração real e potencial foram determinadas a partir do resultado do balanço hídrico climatológico. Inicialmente, foi executada a análise de componentes principais (ACP) sobre os dados climáticos e, em seguida, a de agrupamento nas informações do relevo, solo, nos escores climáticos provenientes da ACP e nas coordenadas geográficas. Os dois primeiros eixos da ACP explicam cerca de 85,3% da variância total acumulada. Após a rotação dos componentes principais, as melhores variáveis correlacionadas ao primeiro eixo foram a amplitude térmica, a temperatura média anual, seguida da evapotranspiração real. Foram definidos seis sítios ambientais para o Estado do Espírito Santo e alguns apresentaram similaridades ao clima. As variáveis topográficas foram os fatores de maior influência na diferenciação dos sítios. A metodologia se mostrou adequada na definição dos sítios.
The objective of this study was to define homogeneous environmental sites in the state of Espírito Santo, Brazil which may possibly be used to indicate potential soil use for the entire state. Multivariate statistics techniques were employed using information of the relief and geographical coordinates, as well as soil and climatic data. Water availability and real and potential evapotranspiration were determined from the results of the climatological water balance. Initially a principal component analysis (PCA) for the climatological data was performed. Subsequently, a grouping analysis was executed on the relief, soil and climatic data provided by the PCA and geographical coordinates. The first two axes of the PCA define roughly 85.3% of the total accumulated variance. After rotation of the principal components, the variables that best correlated to the first axis were the thermal amplitude, average annual temperature, followed by real evapotranspiration. Six environmental sites were defined for the state of Espirito Santo, some presenting climatic similarities. The topographic variables were the factors of greatest influence on the sites differentiation. The methodology was appropriate in defining the sites.
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Authors Yhasmin Paiva Rody, André Quintão de Almeida, Aristides Ribeiro, Gilberto Chohaku Sediyama, José Eduardo Macedo Pezzopane
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Journal Trials
Year 2010
DOI
10.1590/S0103-84782010001200009
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010001200009
Keywords
multivariate statistics

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