Abstract
The study and knowledge of the depuration capacity of the water resources, is necessary to preserve them. This study was objective identify the attenuation capacity of the Belo stream - Caxias do Sul - RS / Brazil, through the evaluation of physicochemical parameters, distance and slope between 4 points located along the stream. Were collected five samplings, bimonthly. The data were analyzed through descriptive statistics, one-way Analysis of Variance (ANOVA "one way"), Tukey’s test e Pearson’s correlation. The results showed that there is an improvement in the quality of water resources from upstream to downstream of the stream. However, despite the stream have a high attenuation potential, is necessary the development of control actions to input of industrial and domestic effluents, to prevent the ecological impairment of the same. http://dx.doi.org/10.18226/23185279.v3iss1p1
Highlights
Scarcity of good water quality poses one of the major and most important problems to be faced by humanity
Considering the variation of physicochemical parameters in the five samplings for the four points (Table II), there is a tendency of increment from upstream (P1) at downstream (P4) of the average concentration for ORP, dissolved oxygen (DO), NO3—N and chemical oxygen demand (COD)/BOD5
The points sampled upstream (P1 and point 2 (P2)), where there is a greater amount of organic matter, the OD resulted in lower concentrations
Summary
Scarcity of good water quality poses one of the major and most important problems to be faced by humanity This problem is occurring due to rapid population growth and consequent increase in water demand, generation of waste water and improper disposal of domestic and industrial solid waste [1]–[4]. This could causing qualitative and quantitative deterioration of water quality in different regions around the world [5], compromising its current and desired uses. Water pollution resulting from contamination by point or nonpoint sources. Nonpoint sources are a result of superficial runoff in urban and rural areas, distributed along the receiving water bodies [6]–[8]
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