Open AccessEvaluation of the quality of groundwater in the municipality of Ji-Paraná, Rondônia, in the Brazilian Amazon region
Author(s) -
Caryne Ferreira Ramos,
Josilena de Jesus Laureano,
Ana Lúcia Denardin da Rosa,
Beatriz Machado Gomes,
João Paulo de Oliveira Gomes,
Gislayne Alves Oliveira,
Andreza Pereira Mendonça,
Wanderley Rodrigues Bastos,
Elisabete Lourdes do Nascimento
Publication year - 2021
Publication title -
revista ibero-americana de ciências ambientais
Language(s) - English
Resource type - Journals
ISSN - 2179-6858
DOI - 10.6008/cbpc2179-6858.2021.007.0021
Subject(s) - nitrate , turbidity , environmental science , groundwater , water quality , hydrology (agriculture) , total dissolved solids , environmental engineering , chemistry , geology , ecology , oceanography , geotechnical engineering , organic chemistry , biology
Groundwater quality can be affected by many factors. The objective of this study was to assess the quality of groundwater and map the flow direction, to identify possible sources of contamination in the districts of Nova Londrina and Nova Colina (Ji-Paraná, Rondônia). Water samples were collected in September 2015 and February 2016 in 20 wells in Nova Londrina and in December 2016 and April 2017 in 15 wells in Nova Colina. The turbidity, pH and electrical conductivity (EC) were measured in loco. The microbiological parameters were determined by the membrane filtration method in a chromogenic medium, and the total dissolved solids (TDS) were measured by the gravimetric method. The nutrients ammonia, nitrite, nitrate, dissolved phosphorus and total phosphorus were ascertained by the spectrophotometric method and the underground flow was obtained by applying the Surfer 8.0 software. Through principal component analysis (PCA) it was possible to detect that the TDS, total coliforms, pH and EC had important contributions to formation of the groundwater axes in Nova Londrina, while the variables EC, nitrate and well and cesspit depths contributed in Nova Colina. The groundwater flow did not differ among the months studied, and was mainly in the northwest-southeast direction in Nova Londrina and from the southeast to other regions in Nova Colina.