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EVALUATION OF THE INFLUENCE OF MACACOS STREAM IN THE WATER QUALITY OF MOGI GUAÇU RIVER, IN THE COUNTY OF MOGI GUAÇU, STATE OF SÃO PAULO, BRAZIL

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Author(s): Fernando Verdenacci Madruga | Fábio Augusto Gomes Vieira Reis | Gerson Araujo de Medeiros3 | Lucilia do Carmo Giordano

Journal: Engenharia Ambiental : Pesquisa e Tecnologia
ISSN 1678-2178

Volume: 5;
Issue: 2;
Start page: 152;
Date: 2008;
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Keywords: Water quality | Water resources | Micro basin.

ABSTRACT
The continuous and disorganized growth of the population and of the cities, associated to the absence of sanitation has caused to a degradation of the water resources at the main brazilian watersheds. The main goal of this research is to evaluate the influence of the Macacos stream on water quality of the Mogi Guaçu river, at county of Mogi Guaçu, state of São Paulo, Brazil. The experiment was carried out on months of July and August of 2006, by means of the analysis of the water quality in the Mogi Guaçu river, upstream and downstream of the confluence with the Macacos stream, and in him referred stream. The following biological and chemical parameters of the water quality were evaluated: total solids dissolved (TDS), dissolved oxygen (DO), biochemical demand of oxygen (BDO), chemical demand of oxygen (CDO), sulphite (S), ammonia (NH3), nitrate (NO3), phosphorus (P), iron (Fe) and total coliforms. The results showed that the water quality of the Mogi Guaçu river is changed after confluence with the Macacos stream. The daily load of TDS, S, NH3, NO3, P e Fe, dumped in the Mogi Guaçu river from Macacos stream, reached 1,077; 45; 14.8; 18.1; 1.8 and 3.0 kg.
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