Portal de Periódicos da CAPES

Artigo Produção Nacional

BIBTEX RIS

Avaliação de balanço anual de cátions e ânions na bacia do Alto Sorocaba (SP)

2008; Sociedade Brasileira de Geologia; Volume: 38; Issue: 4 Linguagem: Inglês

10.5327/rbg.v38i4.1431

2317-4889

Diego de Souza Sardinha, Fabiano Tomazini da Conceição, Daniel Marcos Bonotto, Mauro Henrique Dourador de Salles, Vivian Andréa Angelucci,

Water Quality and Resources Studies

This work evaluated the annual balance of cations and anions at Alto Sorocaba basin, indicating how anthropogenic influences are affecting these values. Eight sampling points were established and it was realized six field campaigns in 08/13/06, 09/20/06, 10/18/06, 11/23/06, 12/10/06 and 01/10/07, that involved the dry and wet period. The analyses were executed for discharge, temperature, pH, conductivity, dissolved oxygen, total dissolved and suspended solids, calcium, magnesium, sodium, potassium, alkalinity, chloride, sulfate, phosphate and nitrate. The results indicated that some points at the Una (P1), Sorocabucu (P2) and Sorocamirim (P3) rivers possess characteristics closer to the natural behavior of dissolved cations and anions in waters due to the weathering of the rocks. However, the absence of treatment of domestic waste at Ibiuna city and the strong agricultural activities reduced the water quality downstream of these points, increasing the eutrophic process in the Itupararanga Reservoir.