Groundwater chemical characterization of a Rio de Janeiro coastal aquifer, SE – Brazil

Silva-Filho, Emmanoel V.; Barcellos, Renato Gomes Sobral; Emblanch, Christophe; Blavoux, Bernard; Sella, Sílvia M.; Daniel, Michel; Simler, Roland; Wasserman, Julio César

doi:10.1016/j.jsames.2008.11.004

Cited by 51 publications

(19 citation statements)

References 20 publications

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“…A number of studies (e.g. Melloul and Collin, 1992;Güler and Thyne, 2004;Silva-Filho et al, 2009) have shown that the hydrogeological context, combined with hydrogeochemical and isotopic characterization of an aquifer can help to identify different types of groundwater (Ca-HCO 3 , Na-HCO 3 and Na-Cl types) as well as the main factors that influence the chemical composition of groundwater. Other studies (Cloutier et al, 2008;Beaudry, 2013;Montcoudiol et al, 2014) have demonstrated a significant correlation between the hydrogeological context and the groundwater chemistry in regions of the Canadian Shield.…”

Section: Introductionmentioning

confidence: 99%

Scenarios of groundwater chemical evolution in a region of the Canadian Shield based on multivariate statistical analysis

Ghesquière

Walter

Chesnaux

et al. 2015

Journal of Hydrology: Regional Studies

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a b s t r a c tStudy region: The study of groundwater chemistry of the Charlevoix/HauteCôte-Nord (CHCN) region in the province of Quebec in Canada is part of a regional hydrogeological characterization project. Study focus: Groundwater was sampled in 113 wells over the 4500 km 2 study area and analyzed for 39 parameters including major, minor, trace and inorganic constituents, plus stable isotopes 2H and 18O. Two multivariate statistical methods, hierarchical cluster analysis (HCA) and R-mode factor analysis (RFA) were combined with graphic methods to classify the samples according to plausible levels of groundwater evolution in that region. New hydrological insights for the region: Four sample clusters were identified. Cluster 1 is composed of low-salinity Ca-HCO 3 groundwater corresponding to recently infiltrated water in surface granular aquifers in recharge areas. Cluster 4 Na-(HCO 3 -Cl) groundwater is more saline and corresponds to more evolved groundwater probably from confined bedrock aquifers. Cluster 2 and Cluster 3 (Ca-Na)-HCO 3 and Ca-HCO 3 groundwater, respectively, correspond to mixed or intermediate water between Cluster 1 and Cluster 4 from possibly interconnected granular and bedrock aquifers. This study identifies groundwater recharge, water-rock interactions, ion exchange, solute diffusion from marine clay aquitards, saltwater intrusion and also hydraulic connections between the Canadian Shield and the granular deposits, as the main processes affecting the hydrogeochemical evolution of groundwater in the CHCN region.

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Section: Introductionmentioning

confidence: 99%

Scenarios of groundwater chemical evolution in a region of the Canadian Shield based on multivariate statistical analysis

Ghesquière

Walter

Chesnaux

et al. 2015

Journal of Hydrology: Regional Studies

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“…[19][20][21] Entretanto, o grau de conhecimento do estado qualitativo e a avaliação adequada das características dos aquíferos costeiros ainda é uma incógnita para muitas regiões da América do Sul. 22 Este trabalho é o primeiro a avaliar a relação do aquífero com as lagoas na região costeira na América do Sul, a partir dos fluxos de nutrientes associados aos aportes subterrâneos.…”

Section: Introductionunclassified

“…22 Este trabalho é o primeiro a avaliar a relação do aquífero com as lagoas na região costeira na América do Sul, a partir dos fluxos de nutrientes associados aos aportes subterrâneos.…”

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Fluxos de nutrientes associados às descargas de água subterrânea para a Lagoa Mangueira (Rio Grande do Sul, Brasil)

et al. 2012

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Recebido em 1/9/10; aceito em 19/5/11; publicado na web em 29/6/11 NUTRIENTS FLUXES FROM GROUNDWATER DISCHARGE INTO MANGUEIRA LAGOON (RIO GRANDE DO SUL, BRASIL). This study assesses the importance of groundwater discharge to dissolved nutrient levels in Mangueira Lagoon. A transect of an irrigation canal in the margin of Lagoon demonstrated a strong geochemical gradient due to high groundwater inputs in this area. Using 222 Rn as a quantitative groundwater tracer, we observed that the flux of dissolved inorganic nitrogen (DIN), silicate and phosphate (1178 and 1977; 26190 and 35652; 167 and 188 mol d -1 for winter and summer, respectively) can continually supply/ sustain primary production. The irrigation canals act as an artificial underground tributary and represent a new source of nutrients to coastal lagoons.Keywords: nutrients; coastal lagoons; submarine groundwater discharge. INTRODUÇÃOAs descargas de água subterrânea, apesar de serem consideradas por hidrólogos como uma das parcelas atuantes no abastecimento de água nos sistemas lacustres e costeiros, 1,2 apenas recentemente foram reconhecidas como uma das importantes fontes de elementos dissolvidos para as águas superficiais. 3-5Em geral, as concentrações dos nutrientes presentes nas águas subterrâneas são mais elevadas do que as encontradas em rios, lagos e estuários, compensando assim o menor fluxo das águas subterrâneas com relação ao escoamento superficial. 3,6,7 Uma vez que estes fluxos ocorrem ao longo de áreas muito extensas, o aporte total de nutrientes para um sistema lacustre ou costeiro pode ser significativo. 8A Planície Costeira do Rio Grande do Sul é privilegiada pelo grande número de rios e lagoas, destacando-se em volume de água, a Laguna dos Patos e as Lagoas Mirim e Mangueira. Como consequência do volume de água disponível, os ambientes costeiros como a Lagoa Mangueira, com uma baixa densidade demográfica em sua área de entorno, têm seus usos preferenciais ligados diretamente à agricultura, pecuária, pesca e à recreação. A restinga localizada entre essas lagoas e o mar é dominada por sedimentos permeáveis, formando uma zona de transição entre a água superficial e água subterrânea. 9O maior consumo de água da Lagoa Mangueira ocorre no período de verão, devido ao cultivo de arroz na área de entorno, onde a retirada de água aliada às perdas por evaporação diminuem drasticamente os níveis de água da Lagoa.10,11 O fornecimento da água para a irrigação requer a construção de canais na região marginal e de levantes que permitem o bombeamento e escoamento das águas até as lavouras. Estes canais são abertos na margem oeste da Lagoa e seu aprofundamento para uma melhor captação de água, inclusive nos períodos de estiagem, que coincide com o período de plantio realizado no verão, modifica a interface margem/lagoa. Santos et al.,12 usando ²²²Rn como traçador geoquímico, demonstraram importante advecção de água subterrânea, principalmente na região dos canais. O ²²²Rn é uma das formas de abordagem mais atuais para a quantificação de advecção de ág...

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“…Fluid inclusions are used regularly to gain insight on composition of wetland pore water in a wide range of geological environments (SHEPHERD et al, 2000), including mangrove ecosystems (Ridd and Stieglitz, 2002 ) may be brought about by diagenetic reactions in mangrove ecosystems, where fresh water and sea water interact (SILVA-FILHO et al, 2009). Such geochemical reactions may be heightened in tropical coastal systems where mangrove forests may increase salinity of shallow pore water through extensive evapotranspiration, as salinity commonly increases beyond sea water values (MCGOWAN; MARTIN, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Such geochemical reactions may be heightened in tropical coastal systems where mangrove forests may increase salinity of shallow pore water through extensive evapotranspiration, as salinity commonly increases beyond sea water values (MCGOWAN; MARTIN, 2007). The relationships between submarine groundwater discharge, relative sea level rise and diagenetic reactions in coastal wetlands have been documented (MOORE, 1999;SILVA-FILHO et al, 2009;SOTO-JIMÉNEZ;PÁEZ-OSUNA, 2010). Major element concentrations of cations and anions may be used to indicate the mixing among water masses and water source.…”

Section: Introductionmentioning

confidence: 99%

Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil

2012

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A B S T R A C TConcentrations of cations and anions of major elements (Na + , Ca 2+ , Mg 2+ , K + , Cl -, SO4 2-) were analyzed in the pore water of a mangrove habitat. Site specific major element concentrations were identified along a four piezometric well transect, which were placed in distinct geobotanic facies. Evapotranspiration was evident in the apicum station, given the high salinity and major element concentrations. The station landward of an apicum was where major element/Cl − ratios standard deviations are greatest, suggesting intense in situ diagenesis. Molar ratios in the most continental station (4) are significantly lower than the nearby freshwater source, indicating a strong influence of sea water flux into the outer reaches of the mangrove ecosystem and encroaching on the Atlantic rain forest. Indeed, the SO4

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Groundwater chemical characterization of a Rio de Janeiro coastal aquifer, SE – Brazil

Cited by 51 publications

References 20 publications

Scenarios of groundwater chemical evolution in a region of the Canadian Shield based on multivariate statistical analysis

Scenarios of groundwater chemical evolution in a region of the Canadian Shield based on multivariate statistical analysis

Fluxos de nutrientes associados às descargas de água subterrânea para a Lagoa Mangueira (Rio Grande do Sul, Brasil)

Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil

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