Resumo

HERNANDEZ-ALVAREZ, Urledys; PINEDO-HERNANDEZ, José; PATERNINA-URIBE, Roberth  e  MARRUGO-NEGRETE, José Luis. Water quality assessment in Quebrada Jui, tributary of the Sinú river, Colombia. rev.udcaactual.divulg.cient. [online]. 2021, vol.24, n.1, e1678.  Epub 21-Abr-2021. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v24.n1.2021.1678.

The micro-base of the Jui creek, framed within the upper Sinú River basin, Colombia Caribbean region, is one of the water resources used by the rural population for consumption, irrigation and sanitation. However, it receives contaminated loads from urban centers in its area of influence that correspond to the discharge wastewater, oxidation lagoon tributaries, livestock activities, sand extraction, agriculture and non-formal crops. The objective of this study was to determine the water quality index (ICA) and establish the relationship between the physical-chemical and microbiological parameters with the different anthropogenic sources to establish a common source of contamination. In addition, the analysis of organochlorinated and organophosphate pesticides to understand the influence of agricultural activities. Samples were taken in six seasons, in the dry and humid period of 2018. Concentrations of physical-chemical and microbiological parameters were analyzed using the American Public Health Association's standardized methods. The pesticides were quantified by the gas chromatography method with mass spectrometry (GC-MS). On average the WQI was 74.1 classifying the water source with good quality, except the seasons (E4 and E5) in the wet period, the classification of which was average, due to the contribution of fecal coliforms and turbidity. The concentration of pesticides was below the detection limit of the method. In general, multivariate statistical analysis indicates that sources of pollution are from domestic wastewater, agricultural runoff, pig excretions and sand mining.

Palavras-chave : Water quality index; Sinu river; Water resources; Contamination origin.

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