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Propiedades físicas químicas em dois pontos fixos na Enseada do Flamengo, Ubatuba (SP), no período de 03 a 07/04/77

1980; SciELO; Volume: 29; Issue: 1 Linguagem: Inglês

10.1590/s0373-55241980000100002

2316-8951

Marister da Silva Gonsalves, Rosane Gonçalves Ito, Linda Nishihara, Eduardo Antônio Pinheiro, Waldemar Tavares, Oswaldo Ambrósio, Inês Joekes,

Water Quality and Pollution Assessment

Temporal variation of some physical and chemical observations was performed during four days with six hour of intervals at two fixed stations at the Enseada do Flamengo, Ubatuba, Sao Paulo. The salinity (34.3‰ - 35.1‰) and temperature values (about 26oC) are typical of local coastal waters. The dissolved oxygen shows super saturation content with some exceptions. The nitrogen (nitrite and nitrate) forms have very low values, with a maximum of 1.0 µg-at/l (nitrate). Other nutrients, like phosphates (0.15 - 0.80 µg-at/l) and silicates (5.0-21.5 µg-at/l) and the relationship N:P (1:3)3 show the poor terrigenous contribution and small bioproductivity. The pH and alcalinity was normal for sea water.