Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Anuário do Instituto de Geociências (Online) |
Texto Completo: | https://revistas.ufrj.br/index.php/aigeo/article/view/6772 |
Resumo: | The oceanic area of Maricá, in the east coast of the Rio de Janeiro State, relies on groundwater as its main source of fresh water supply along with the use of water tank trucks. With the increasing demand of water resources, water supply and contamination problems are foreseen, and sea water intrusion phenomenon is also expected in these aquifers. The groundwater resource of the target area has been submitted to quality degradation due to the advance of the saline wedge, the excess of pumping without control and also the pollution of organic origin. Considering this situation, the study aims to contribute to a better knowledge of the hydrogeological characteristics in order to assist the aquifer management of the coastal area under study. The area comprises a granular aquifer and local geology consists basically of marine and fluvio-marine Quaternary sandbar deposits, overlying a crystalline basement of variable depth. The study included the evaluation of previously existing hydrological data in the area, rainfall data, and a field survey in 41 wells, with measurements of hydrodynamic and physical-chemical parameters (temperature, electric conductivity, hydraulic head). Furthermore, an automatic instrumentation was installed to evaluate the response of the aquifer to recharge. Results indicate that aquifer salinity levels tend to rise in the SE portion, and also, apparently, there has been an increase in aquifer salinization in recent years, demanding urgent management actions. The automatic instrumentation shows that Maricá coastal aquifer gives a rapid response to seasonal factors and climate, showing some vulnerability, but also rapid recharge and dilution capacity. |
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Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, BrazilFatores hidrogeológicos no estudo da intrusão salina em aqüíferos costeiros da região litorânea do município de Maricá - RJThe oceanic area of Maricá, in the east coast of the Rio de Janeiro State, relies on groundwater as its main source of fresh water supply along with the use of water tank trucks. With the increasing demand of water resources, water supply and contamination problems are foreseen, and sea water intrusion phenomenon is also expected in these aquifers. The groundwater resource of the target area has been submitted to quality degradation due to the advance of the saline wedge, the excess of pumping without control and also the pollution of organic origin. Considering this situation, the study aims to contribute to a better knowledge of the hydrogeological characteristics in order to assist the aquifer management of the coastal area under study. The area comprises a granular aquifer and local geology consists basically of marine and fluvio-marine Quaternary sandbar deposits, overlying a crystalline basement of variable depth. The study included the evaluation of previously existing hydrological data in the area, rainfall data, and a field survey in 41 wells, with measurements of hydrodynamic and physical-chemical parameters (temperature, electric conductivity, hydraulic head). Furthermore, an automatic instrumentation was installed to evaluate the response of the aquifer to recharge. Results indicate that aquifer salinity levels tend to rise in the SE portion, and also, apparently, there has been an increase in aquifer salinization in recent years, demanding urgent management actions. The automatic instrumentation shows that Maricá coastal aquifer gives a rapid response to seasonal factors and climate, showing some vulnerability, but also rapid recharge and dilution capacity.A área costeira de Maricá, no litoral leste do estado do Rio de Janeiro, tem na água subterrânea sua principal fonte de abastecimento, juntamente com o abastecimento por carros-pipa. Com a crescente demanda dos recursos hídricos subterrâneos, são esperados problemas de abastecimento e contaminação, além do fenômeno da intrusão de água marinha nesses aqüíferos. O recurso hídrico subterrâneo da área-alvo vem sofrendo uma degradação de sua qualidade devido ao provável avanço da cunha salina marinha, pelo excesso de bombeamento sem controle e também pela poluição de origem orgânica. Considerando o exposto, este estudo visa contribuir para um melhor conhecimento das características hidrogeológicas de modo a auxiliar o gerenciamento do aqüífero costeiro da área estudada. A região é composta por um aqüífero do tipo granular e a geologia local é constituída basicamente por depósitos de restinga, marinhos e flúvio marinhos de idade quaternária que ocupam a faixa litorânea, sobrepostos a um embasamento cristalino de profundidade variável. Além do estudo de dados hidrológicos previamente existentes na área gerados pelos próprios autores, realizou-se um levantamento de dados hidrogeológicos de campo em 41 poços, com medições de parâmetros físico-químicos e hidrodinâmicos (temperatura, condutividade elétrica, nível d'água). Ademais, instalou-se uma instrumentação automática para avaliação da resposta do aqüífero quanto à recarga e quanto à variações temporais. Os resultados indicam que os níveis de salinidade do aqüífero local tendem a ser mais elevados na sua porção SE, e também que, aparentemente, tem havido um aumento da salinização do aqüífero nos últimos anos, o que demanda ações urgentes de gestão. A instrumentação automática mostra que o aqüífero costeiro de Maricá apresenta rápida resposta aos fatores sazonais e climáticos, denotando certa vulnerabilidade, mas também rápida recarga e poder de diluição.Universidade Federal do Rio de Janeiro2007-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/677210.11137/2007_2_104-117Anuário do Instituto de Geociências; Vol 30, No 2 (2007); 104-117Anuário do Instituto de Geociências; Vol 30, No 2 (2007); 104-1171982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJporhttps://revistas.ufrj.br/index.php/aigeo/article/view/6772/5369Copyright (c) 2007 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessAlmeida, Ghislaine M. deSilva Junior, Gerson Cardoso da2017-01-23T21:48:24Zoai:www.revistas.ufrj.br:article/6772Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2017-01-23T21:48:24Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false |
dc.title.none.fl_str_mv |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil Fatores hidrogeológicos no estudo da intrusão salina em aqüíferos costeiros da região litorânea do município de Maricá - RJ |
title |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil |
spellingShingle |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil Almeida, Ghislaine M. de |
title_short |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil |
title_full |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil |
title_fullStr |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil |
title_full_unstemmed |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil |
title_sort |
Hydrogeological factors in the study of saline intrusion of the coastal aquifers of Maricá city, Rio de Janeiro, Brazil |
author |
Almeida, Ghislaine M. de |
author_facet |
Almeida, Ghislaine M. de Silva Junior, Gerson Cardoso da |
author_role |
author |
author2 |
Silva Junior, Gerson Cardoso da |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Almeida, Ghislaine M. de Silva Junior, Gerson Cardoso da |
description |
The oceanic area of Maricá, in the east coast of the Rio de Janeiro State, relies on groundwater as its main source of fresh water supply along with the use of water tank trucks. With the increasing demand of water resources, water supply and contamination problems are foreseen, and sea water intrusion phenomenon is also expected in these aquifers. The groundwater resource of the target area has been submitted to quality degradation due to the advance of the saline wedge, the excess of pumping without control and also the pollution of organic origin. Considering this situation, the study aims to contribute to a better knowledge of the hydrogeological characteristics in order to assist the aquifer management of the coastal area under study. The area comprises a granular aquifer and local geology consists basically of marine and fluvio-marine Quaternary sandbar deposits, overlying a crystalline basement of variable depth. The study included the evaluation of previously existing hydrological data in the area, rainfall data, and a field survey in 41 wells, with measurements of hydrodynamic and physical-chemical parameters (temperature, electric conductivity, hydraulic head). Furthermore, an automatic instrumentation was installed to evaluate the response of the aquifer to recharge. Results indicate that aquifer salinity levels tend to rise in the SE portion, and also, apparently, there has been an increase in aquifer salinization in recent years, demanding urgent management actions. The automatic instrumentation shows that Maricá coastal aquifer gives a rapid response to seasonal factors and climate, showing some vulnerability, but also rapid recharge and dilution capacity. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-12-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/6772 10.11137/2007_2_104-117 |
url |
https://revistas.ufrj.br/index.php/aigeo/article/view/6772 |
identifier_str_mv |
10.11137/2007_2_104-117 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/6772/5369 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2007 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2007 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro |
publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro |
dc.source.none.fl_str_mv |
Anuário do Instituto de Geociências; Vol 30, No 2 (2007); 104-117 Anuário do Instituto de Geociências; Vol 30, No 2 (2007); 104-117 1982-3908 0101-9759 reponame:Anuário do Instituto de Geociências (Online) instname:Universidade Federal do Rio de Janeiro (UFRJ) instacron:UFRJ |
instname_str |
Universidade Federal do Rio de Janeiro (UFRJ) |
instacron_str |
UFRJ |
institution |
UFRJ |
reponame_str |
Anuário do Instituto de Geociências (Online) |
collection |
Anuário do Instituto de Geociências (Online) |
repository.name.fl_str_mv |
Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ) |
repository.mail.fl_str_mv |
anuario@igeo.ufrj.br|| |
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1797053542300647424 |