Fluxes evaluation of main chemical species dissolved in the Sorocaba river (SP)

Autor: Alexandre Martins Fernandes, Jefferson Mortatti, Eder Paulo Spatti Junior, Edvaldo Guedes Junior, Diego de Souza Sardinha, Fabiano Tomazini da Conceição
Přispěvatelé: Universidade Estadual Paulista (UNESP), Universidade Federal de Alfenas, Universidade de São Paulo (USP)
Jazyk: portugalština
Rok vydání: 2017
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Made available in DSpace on 2022-04-29T08:14:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) FLUXES EVALUATION OF MAIN CHEMICAL SPECIES DISSOLVED IN THE SOROCABA RIVER (SP). This study aimed to characterize the hydrochemistry of the main chemical species dissolved in the Sorocaba River, as well as evaluate their fluxes in a hydrological cycle and during dry and rainy periods. Between June 2009 and June 2010, twelve river water samples were collected, which showed near neutral pH (6.9 to 7.3) and a marked seasonal variation of conductivity, temperature and concentration of chemical species studied. The regression models adjusted to concentration x discharge relationship were significant (p < 0,01) and indicated an association of Ca2+, Mg2+, K+, HCO3 - and TDS to diffuse sources and Na+, NO3 - and PO4 3- the punctual sources, without clearly identifying the predominant contributions of SiO2, Cl- and SO4 2-. A comparative analysis of the exponents of the adjusted models proposed, which confirmed previous associations and related SiO2, Cl- and SO4 2- to a mix of sources. The dissolved load contribution of the Sorocaba River to Middle Tietê basin was 392.16 x 103 t a-1, the most significant being those of HCO3 - and SiO2, followed by Ca2+, Na+, Cl-, SO4 2-, NO3 -, K+, Mg2+ and PO4 3-, order maintained in the dry and rainy periods, with exception of NO3-which showed similar charge in the three periods. Departamento de Engenharia Civil Faculdade de Engenharia de Bauru Universidade Estadual Paulista “Júlio de Mesquita Filho, Avenida Engenheiro Luiz Edmundo Carrijo Coube, 14-01 Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista “Júlio de Mesquita Filho, Avenida 24-A, 1515, Caixa Postal 178 Instituto de Ciência e Tecnologia Universidade Federal de Alfenas, BR 267, km 533, Rodovia José Aurélio Vilela, 11.999, Cidade Universitária Centro de Energia Nuclear na Agricultura Universidade de São Paulo, Avenida Centenário, 303, Caixa Postal 96 Departamento de Engenharia Civil Faculdade de Engenharia de Bauru Universidade Estadual Paulista “Júlio de Mesquita Filho, Avenida Engenheiro Luiz Edmundo Carrijo Coube, 14-01 Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista “Júlio de Mesquita Filho, Avenida 24-A, 1515, Caixa Postal 178 CAPES: 08/09369-9 FAPESP: 08/57104-4 CNPq: 134169/2009-3
Databáze: OpenAIRE
Externí odkaz: