Caracterização físico-química do estuário de Barra do Una, Peruíbe/SP
Abstract
Palavras-chave: oxigênio dissolvido, salinidade, temperatura, pH.
The aim of this work was the characterizing of physical-chemical characteristics of Una do Prelado River, estuary and the beach of Barra do Una in the Sustainable Development Reserve in Peruibe, at the Ecological Estation of Juréia-Itatins, southern coast of São Paulo. Measurements of superficial water temperature (Cº), salinity, pH and dissolved oxygen concentration (OD) were taken during a low neap tide in 10 points at the river, estuary, river mouth and beach. The data collected were analyzed through the Analysis of Variance (ANOVA), clustering and principal component analyses (PCA) to evaluate differences among the points. The salinity presented a great variation characterizing as brackish water in the river points and stabilizing in the beach. The OD values were low between the river and beach points. ANOVA test showed significant difference among the points. A point at the mouth river can be considered the intersection point between the river and the beach, and the last point ate the beach obtained the same values, indicating the values stability.
Keyword: dissolved oxygen, salinity, temperature, pH.
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