Produção Nacional
Hidrogeologia e geometria dos aquíferos das formações cretáceas Içá e Solimões, Bacia Paleozoica do Solimões, na região de Urucu, Amazonas
2012; Sociedade Brasileira de Geologia; Volume: 42; Issue: s1 Linguagem: Inglês
10.5327/z0375-75362012000500012
ISSN2177-4382
AutoresPaulo Galvão, José Geilson Alves Demétrio, Eliene Lopes de Souza, Cleane Do Socorro Da Silva Pinheiro, Marcus Paulus Martins Baessa,
Tópico(s)Groundwater and Isotope Geochemistry
ResumoGroundwater has a fundamental role in the water cycle in the Amazon region and constitutes a significant good-quality reserve of water, which can be used for various purposes. The hydrogeological information of this region are still very scarce, being restricted only to the aquifers of the Cenozoic deposits (Solimões and Alter do Chão Formations), with studies particularly concentrated in the region of Manaus, Amazonas State, and Belém, in Pará State. Thus, systematic studies are needed for analysis of the hydrogeological conditions, in order to optimize the exploitation and use of groundwater to ensure sustainability, as well as to characterize the aquifer geometry, productivity, recharge conditions, among others. This research was performed in Urucu Oil Province, Coari county, State of Amazonas, Brazil. The main objective was the hydrogeological characterization of the Içá-Solimões Aquifer System. The study showed that this system has a 50-meter average thickness, with a convex shaped geometry as revealed by isobaths mapping. The potentiometry showed that the behavior of the groundwater flow is consistent with the topographic surface, coming toward the river Urucu. The following average values of hydrogeological parameters were observed: transmissivity = 3 x 10-3 m2/s, storage coefficient = 5 x 10-4, and hydraulic conductivity = 1 x 10-4 m/s. It was concluded that this is an aquifer of the unconfined-confined type, which presents a good potential for exploitation, being already used by the province.
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