Hydrochemical relationships in groundwater from central São Paulo State, Brazil
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/05/2005
|
Resumo |
Groundwater samples from different aquifers occurring at center/northeast portion of São Paulo State, Brazil, were collected and chemically analyzed. The waters leaching Mesozoic sediments are generally more acid (pH(average) = 5.9) and have lower values for total dissolved solids (TDSaverage = 105 mg/L) than those obtained for waters leaching Paleozoic sediments of Tubarao Group. First-degree trend surfaces revealed that the deeper tubular wells occur towards east/southeast and exploit Paleozoic sediments as well fractured/fissured diabases/basalts, whereas the tubular wells in the west/northwest region are shallower. Piper diagrams indicated that the majority of the waters are a blend of waters from different lithologies. Significant correlations were found among nitrate, chloride and bicarbonate, suggesting the occurrence of some anthropogenic inputs, whereas elevated alpha activity of geogenic Ra-226 indicated the need of a broad radiometric survey in the area. |
Formato |
942-955 |
Identificador |
http://dx.doi.org/10.1007/s00254-005-1224-3 Environmental Geology. New York: Springer, v. 47, n. 7, p. 942-955, 2005. 0943-0105 http://hdl.handle.net/11449/31446 10.1007/s00254-005-1224-3 WOS:000229765500007 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
Environmental Geology |
Direitos |
closedAccess |
Palavras-Chave | #hydrochemistry #water quality #water-rock interaction #aquifers at central São Paulo State in Brazil #Rio Claro city and adjacent municipalities |
Tipo |
info:eu-repo/semantics/article |