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Article

Influence of Rainfall Seasonality in Groundwater Chemistry at Western Region of São Paulo State—Brazil

Department of Chemistry and Biochemistry, School of Science and Technology—Sao Paulo State University (UNESP), Rua Roberto Simonsen 305, Presidente Prudente, SP 19060-900, Brazil
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Academic Editor: Aldo Fiori
Water 2021, 13(11), 1450; https://doi.org/10.3390/w13111450
Received: 18 February 2021 / Revised: 24 April 2021 / Accepted: 19 May 2021 / Published: 21 May 2021
(This article belongs to the Section Water Quality and Contamination)
The present study evaluated the spatiotemporal variation in concentration of cadmium, lead and copper ions in groundwater wells in the stratigraphic subdivision “Santo Anastácio” that belongs to the Bauru aquifer system in the western region of São Paulo State. Exploratory statistics methods were employed to investigate the response of the concentration of these metals in the aquifer through the pluviometric index of the region. The results show a direct dependence of the mean monthly flow of the metals in the groundwaters to the monthly rainfall flow. The observed behavior was cyclic with a gradual increase and decrease in the flow throughout time. Two groups of cyclic variation were identified. The seasonality of the mean monthly flow of Cd2+ and Pb2+ was inversely proportional to the magnitude of the pluviometric index of the region studied. Meanwhile, the seasonality of Cu2+ was directly correlated to the seasonable rainfall variability. These behaviors lead us to point out that cadmium and lead come from minerals present in the aquifer itself and the presence of copper in groundwater is associated with an anthropogenic action due to the region’s agricultural activity. The study helps us better comprehend the behavior of the whole groundwater system through a comparison with temporal hydrogeochemistry. View Full-Text
Keywords: spatiotemporal distribution; metal transport; correlation analysis; groundwater spatiotemporal distribution; metal transport; correlation analysis; groundwater
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MDPI and ACS Style

Maroubo, L.A.; Moreira-Silva, M.R.; Teixeira, J.J.; Teixeira, M.F.S. Influence of Rainfall Seasonality in Groundwater Chemistry at Western Region of São Paulo State—Brazil. Water 2021, 13, 1450. https://doi.org/10.3390/w13111450

AMA Style

Maroubo LA, Moreira-Silva MR, Teixeira JJ, Teixeira MFS. Influence of Rainfall Seasonality in Groundwater Chemistry at Western Region of São Paulo State—Brazil. Water. 2021; 13(11):1450. https://doi.org/10.3390/w13111450

Chicago/Turabian Style

Maroubo, Lais A., Marcos R. Moreira-Silva, José J. Teixeira, and Marcos F.S. Teixeira 2021. "Influence of Rainfall Seasonality in Groundwater Chemistry at Western Region of São Paulo State—Brazil" Water 13, no. 11: 1450. https://doi.org/10.3390/w13111450

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