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A B S T R A C T The state of Paraiba is characterized by striking climatic irregularities, both its spatial and temporal rainfall, since 86.6% of its territory is part of the Brazilian semiarid region. The vegetation of caatinga, enough already impacted by human activity, has different features related to soil and climatic factors, among these, the precipitation, which influenced by the relief, tends to increase with altitude within the different spaces hidrogeografic. The lower rainfall, increased aridity and the irregularity of rainfall distribution. In the dry season, most plants of the caatinga lose foliage, recovering quickly, as soon as you start a new period of rain. Generally, the quantity and persistence of hardwood biomass from caatinga vegetation is related to soil water availability. This study aimed to analyze the influence of antecedent moisture on multispectral image captured by the sensor and medium resolution satellite used for mapping of

revista brasileira de geografia física

Mapeamento da Caatinga com Uso de Geotecnologia e Análise da Umidade Antecedente em Bacia Hidrográfica (Mapping of Caatinga with Use of Geotechnology and Analysis of Antecedent Humidity in Hydrographic Basin)