Título :	Spatio‑temporal study of water quality variables in the Rio de Ondas Hydrographic Basin, west of Bahia, Brazil using multivariate analysis
Autor :	Rego, Enoc Lima do Portela, Joelma Ferreira Ribeiro, Camila de Lima Souza, João Pedro Rudrigues de Tonhá, Myller de Sousa Peres, Lucas Garcia Magalhães Nakamura, Thamilin Costa Silva, José Domingos Santos da Souza, Jurandir Rodrigues de
metadata.dc.contributor.affiliation:	University of Brasília, Institute of Chemistry Federal University of the West of Bahia, Center of Exacts and Technological Sciences Baiano Federal Institute of Education, Science and Technology, Campus Guanambi University of Brasília, Institute of Chemistry University of Brasília, Institute of Chemistry University of Brasília, Institute of Chemistry University of Brasília, Institute of Geosciences University of Brasília, Institute of Geography University of Brasília, Institute of Chemistry Federal University of the West of Bahia, Center of Exacts and Technological Sciences Federal University of the West of Bahia, Center of Exacts and Technological Sciences University of Brasília, Institute of Chemistry
Assunto::	Análise multivariada Água - qualidade Sazonalidade Bacias hidrográficas - Ondas, Rio - Bahia (BA) Transporte de contaminantes
Fecha de publicación :	9-sep-2023
Editorial :	Springer
Citación :	Rego, E. L. et al. Spatio-temporal study of water quality variables in the Rio de Ondas Hydrographic Basin, west of Bahia, Brazil using multivariate analysis. Environmental Monitoring Assessment, v. 195, art. n. 1175, 2023. DOI: https://doi.org/10.1007/s10661-023-11823-4
Abstract:	Water bodies are containers that receive a large load of water quality variables through the release of domestic, industrial, and agricultural efuents. With this focus, this work aimed to conduct a temporal-spatial variability study in the Rio de Ondas Hydrographic Basin through multivariate statistical analysis. For this, seventeen collection sites were established in four stations along the Rio de Ondas and its tributaries between 2017 and 2018. Ionic chromatography with suppressed conductivity was used for ions determination, while ICP-OES determined metals’ total concentrations. The land use and occupation assessment between 1985 and 2021 was using data from MapBiomas were used andthe descriptive and multivariate analysis of the data using version free of the Statistica software. The results showed that, in 30 years, there was a growth of 569% of agricultural activities in the watershed area, with signifcant suppression of native vegetation, favoring the transport of contaminants to rivers. Ca2+, PO4 2−, Al, Cu, and Zn concentrations showed a statistically signifcant diference between the seasons, with higher medians in the rainy season. Rainy season infuenced the formation of three groups in the PCA, consisting of electrical conductivity, salinity, TDS, and PO4 2− (group 1); temperature, Fe, SO4 2−, and Cl− (group 2); and Ca2+, Mg2+, Na+, and HCO3 − (group 3). The strong correlation between parameters of each group indicates anthropic infuence on the watershed’s water quality. However, levels are within the potability standard.
metadata.dc.description.unidade:	Instituto de Química (IQ) Instituto de Geociências (IG)
metadata.dc.description.ppg:	Programa de Pós-Graduação em Química
DOI:	https://doi.org/10.1007/s10661-023-11823-4
metadata.dc.relation.publisherversion:	https://link.springer.com/article/10.1007/s10661-023-11823-4
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