Abstract
Water quality has degraded dramatically in the Chocancharava River (Río Cuarto, Córdoba, Argentina) due to point and non-point sources. This paper aims to assess spatial and temporal variations of physical and chemical parameters of the river. Six sampling sites and six sampling campaigns were developed. During the period 2007–2008, wet and dry seasons were included. A statistical analysis was carried out with 23 physical and chemical variables. Then, a new statistical analysis was carried out including the Riparian Corridors Quality Index and the physical and chemical variables (24 variables). Considering a multivariate system, analysis of variance, principal component analysis and cluster analysis were used. From the statistical analysis, the river was divided into two zones with different degrees of contamination. The most polluted zone is due to pollution inputs of urban, industrial and agricultural sources. This area showed a remarkable deterioration in water quality, mainly due to wastewater discharges. According to Riparian Quality, better results were found in sections of poor water quality, due to the fact that the river bank forest was less degraded downstream of the sewage discharge.
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The authors acknowledge the financial support of the Secretariats of Science and Technology of the Universidad Nacional de Río Cuarto (UNRC) and Universidad de San Luis (UNSL). The authors wish to thank the student Lucrecia Celli, Agricultural Engineering, Faculty of Agronomy and Veterinary (UNRC), for her technical support in the sampling campaigns, and student Miguel Avalos, Biological Sciences, Faculty of Chemical Physical and Natural Sciences (UNRC), for his assistance on ecological data collection.
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Gatica, E.A., Almeida, C.A., Mallea, M.A. et al. Water quality assessment, by statistical analysis, on rural and urban areas of Chocancharava River (Río Cuarto), Córdoba, Argentina. Environ Monit Assess 184, 7257–7274 (2012). https://doi.org/10.1007/s10661-011-2495-7
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DOI: https://doi.org/10.1007/s10661-011-2495-7