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O desmatamento, a baixa fertilidade, a erosao, a salinizacao, e a compactacao do solo sao fatores de degradacao ambiental, e com intervencoes inadequadas das atividades humanas sobre o meio ambiente, como a supressao da cobertura vegetal para a introducao de praticas agricolas e pecuarias, a exploracao de bens minerais e implantacao de nucleos urbanos, os processos erosivos se intensificam e passam a comprometer os principais recursos naturais do planeta, em particular, o solo e a agua superficial. Este trabalho objetivou o mapeamento da deterioracao ambiental do municipio de Sume utilizando o Indice de Deterioracao das Terras Semiaridas para a realizacao de diagnosticos atraves de tecnicas de geoprocessamento. No mapeamento foi estimada a erodibilidade dos solos, a cobertura vegetal e a declividade utilizando a linguagem algebrica do SPRING para o cruzamento das informacoes. Observou-se que 82,77% das terras apresentaram relevo plano e suave ondulado; os solos apresentaram erodibilidade alta em 73,3% da area; as classes baixa e muito baixa de cobertura do solo ocupam 48,6%. Os resultados demonstram que 39,59% das terras apresentam niveis medios de deterioracao. A B S T R A C T The inappropriate use and management of lands have degraded soils, accelerating the impact of human activities on the environment, particularly in semi-arid regions and integrated knowledge of the landscape and acting processes is important to interpret the environment in a perspective that admits interrelationships the various attributes of the land. This study aimed at mapping the environmental deterioration of the municipality of Sume-PB using the Index Deterioration of semiarid lands to perform diagnoses using GIS techniques. In the mapping we estimated the erodibility of soils, land cover and slope using the algebraic language for the SPRING crossing information. It was observed that the lands of the study area is predominantly flat to mild wavy, with slopes less than 6%. The class is represented by High erodibility Entisols and chromic Luvisols. The very high and high class due to lower soil protection by vegetation totaling 6.34% of the area. The results demonstrate that the high and very high levels of deterioration of land are associated with high erodibility of chromic Luvisols vertics and the low level of protection of ground vegetation of the area. Keywords : Degradation, Modeling, Geoprocessing.

Mapeamento da Deterioração Ambiental em Área de Vegetação de Caatinga (Mapping of Environmental Deterioration in Vegetation Caatinga Area)