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| Chaves,Luiz Carlos Guerreiro; Lopes,Fernando Bezerra; Maia,Anthony Rafael Soares; Meireles,Ana Célia Maia; Andrade,Eunice Maia de. |
| ABSTRACT The semi-arid region of Brazil is characterised by the irregular temporal and spatial distribution of the rainfall, which together with anthropogenic action causes degradation of the water quality. The aim of this study was to evaluate water quality in surface reservoirs in the Brazilian semi-arid region due to rainfall variability and the degree of anthropisation of the watersheds. Water samples were collected at the Orós, Trussu and Muquém reservoirs during August and December of 2012, April, October and December of 2013, and March and June of 2014 (dry and rainy periods). The following limnological attributes were analysed: electrical conductivity, pH, turbidity, transparency and chlorophyll-a, with the results evaluated using box plots, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthropised area; Surface water; Spatial and temporal variability of precipitation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200223 |
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| Neto,José Ribeiro de Araújo; Andrade,Eunice Maia de; Palácio,Helba Araújo de Queiroz; Sales,Maria Monaliza de; Maia,Anthony Rafael Soares. |
| ABSTRACT The growing pressure on water resources has reduced its availability as regards quality. Data was investigated for two different periods, with the aim of evaluating the influence of the use and occupation of space on the temporal dynamics of the quality of surface and groundwater in the perennialised valley of the Trussu River in the State of Ceará, Brazil. The first period was from September 2002 to February 2004 and the second from April 2013 to April 2014. Twenty-two water samples were taken from nine sampling stations, five on the surface and four underground. The same stations were considered, monitoring 12 attributes of water quality for a total of 2,376 analyses. Temporal dynamics were characterised employing a technique of multivariate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water contamination; Multivariate analysis; Semi-arid region. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100059 |
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