Variabilidade espaçotemporal das águas subterrâneas do aquífero bauru impróprias para o consumo humano: Concentrações de bário, crômio total e vanádio

Autor: Lima, César Gustavo da Rocha [UNESP], de LOLLO, José Augusto [UNESP], Bacani, Vitor Matheus, Costa, Nídia Raquel [UNESP]
Přispěvatelé: Universidade Estadual Paulista (UNESP), Universidade Federal de Mato Grosso do Sul (UFMS)
Jazyk: portugalština
Rok vydání: 2020
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Made available in DSpace on 2022-04-28T19:29:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 Among the parameters of water quality can be highlighted Barium, Total Chromium and Vanadium, due to the possible harmful effects on human health. Data from the Environmental Company of São Paulo State have pointed to wells at the Bauru Aquifer System (BAS) with concentrations of these elements above of the maximum permissible values (MPV). This work aims to characterize the spatial and temporal variability of waters unfit for human consumption in the BAS as a function of the concentrations of Barium, Total Chromium and Vanadium. The triennial groundwater quality data (2013-2015) were used, considering 74 (in 2013), 82 (in 2014) and 88 (in 2015) monitoring wells at BAS. The descriptive statistical analysis was performed and the spatial dependence was evaluated through the experimental variogram. The integration of the kriging maps was done through simple map algebra operations. The descriptive analysis indicated that all parameters/ periods studied presented occurrences of values above the MPV. The most critical situations were for Total Chromium that presented between 11-16 wells with values above 50 μg L-1 and Vanadium which presented between 4-7 wells with values above 50 μg L-1. It was verified the spatial dependence for all parameters studied, whose variograms adjustments presented R2 between 0.707 to 0.966 and cross-validation correlation coefficient (r) ranging from 0.606 to 0.902, indicating appreciable estimation maps by kriging. The ranges varied from 52.6-79.5 km (Barium), 81.0-120.3 km (Total Chromium), and 44.6-55.7 km (Vanadium). The area of greatest attention is in the Presidente Prudente region, with estimates above the MPV combined for Total Chromium and Vanadium. The results deserve attention from the responsible authorities, mainly due to the fact that there are numerous private wells in these areas. Programa de Pós-graduação em Engenharia Civil Faculdade de Engenharia Universidade Estadual Paulista, Alameda Bahia, 550 Programa de Pós-Graduação em Geografia Campus de Três Lagoas Universidade Federal de Mato Grosso do Sul, Avenida Ranulpho Marques Leal, 3484 Programa de Pós-graduação em Agronomia Faculdade de Ciências Agronômicas Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780 Programa de Pós-graduação em Engenharia Civil Faculdade de Engenharia Universidade Estadual Paulista, Alameda Bahia, 550 Programa de Pós-graduação em Agronomia Faculdade de Ciências Agronômicas Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780
Databáze: OpenAIRE