Geoprocessameto

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934
Anais XIII Simpósio Brasileiro de Sensoriamento Remoto, Florianópolis, Brasil, 21-26 abril 2007, INPE, p. 2621-2628.

Geoprocessamento aplicado ao planejamento e gestão ambiental na Área de Proteção Ambiental de Cafuringa, Distrito Federal Parte 3: risco de rebaixamento e contaminação de aqüíferos na Chapada da Contagem Paulo de Tarso Ferro de Oliveira Fortes 1, 2 Gustavo Isac Monteiro de Oliveira 1 Edison Crepani 3 José Simeão de Medeiros 3 Universidade de Brasília - Instituto de Geociências - UnB/IG Campus Universitário Darcy Ribeiro - Asa Norte - 70.910-900 - Brasília - DF, Brasil [e-mail] [e-mail]
2 1

Universidade Federal do Espírito Santo - Centro de Ciências Agrárias - UFES/CCA Alto Universitário s/n - Centro - 29.500-000 - Alegre - ES. Brasil

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Instituto Nacional de Pesquisas Espaciais - Divisão de Sensoriamento Remoto - INPE/DSR Av. dos Astronautas, 1.758 - Jardim Granja - 12.227-010 - São José dos Campos - SP, Brasil [e-mail] simeã[e-mail]

Abstract. The Contagem tableland is the most favorable aquifer recharge region in the Cafuringa Environmental Protection Area and it is strongly affected by agricultural and urban occupation, especially at its southeastern portion. Spatial analysis was applied to generate digital terrain model and derived slope map; to calculate tubular wells and non-septic tanks density maps by using the Kernel density estimator. The density maps were combined with occupation and soil maps were weighted by the Analytical Hierarchical Process with arbitrary values for each class and generated aquifer lowering and contamination risk maps. The analysis of the aquifer lowering map indicates the Grande Colorado Villages and the Vila Basevi urban areas and the initial portion of the Lago Oeste rural area as the most critical areas, while the aquifer contamination risk map indicates the Vila Basevi and the parceled out regions of the Lago Oeste rural