Hidroquímica das águas subterrâneas no calcário Jandaíra - Chapada do Apodi

• Autor(a) principal: Fernandes, Maria Aparecida Belém
• Data de Publicação: 2002
• Outros Autores: Santiago, Maria Marlúcia Freitas, Mendonça, Luiz Alberto Ribeiro, Lima, José Ossian Gadelha de, Mendes Filho, Josué, Frischkorn, Horst
• Tipo de documento: Artigo de conferência
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/9287
• topic: Hidroquímica; Oxigênio-18; Chapada do Apodi

Six drilled wells in the eastern part of Ceara, on the top of the Apodi Plateau, exploiting the limestone of the Jandaira aquifer, were sampled during the dry season (in August and November, 2001) and during the rainy one (in January and April, 2002). During all periods, dry or wet, waters are of the Cl-/ mixed type. Oxygen-18 was measured in samples from August and November, 2001. The results show that these waters are marked by elevated 18O, indicating evaporation before recharge. As these waters are being used in large scale irrigation, we classified them according to the American Salinity Laboratory System. With the exception of one single sample, all are of the C3S1 type.