Hydrochemical
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Spatial and Temporal Hydrochemical Variation of a Third Order River Network in a Quasi Pristine Coastal Watershed, at Southern Bahia, Brazil
RESUMO A bacia hidrográfica do Rio da Serra tem suas cabeceiras situadas em remanescentes de mata ombrófila densa em excelente estado de preservação e pequenas propriedades rurais nos trechos médio e final. Tais características permitem o estudo da hidroquímica fluvial sob condições quase que totalmente sem interferência antrópica. Foram adotadas
An. Acad. Bras. Ciênc.. Publicado em: 10/11/2013
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2. Estudo morfológico e hidroquímico de pequenas depressões na Nhecolândia, Pantanal, MS / Morphological and hydrochemical study of small depressions in Nhecolândia, Pantanal, MS
The southern part of the Taquari alluvial fan, called Nhecolândia, is a sub-region of the Pantanal of Mato-Grosso exhibiting a complex of round shape lakes, draining fields, forested sandy areas, small watercourses and small depressions. Former studies have shown that the sub-superficial water fluxes depend on the intensity of the flood and on the presence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2012
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3. Levantamento dos níveis de radioatividade natural em águas do alto Vale do Ribeira à planície costeira do litoral sul do Estado de São Paulo / Assessment of natural radioctivity levels in waters from Higher Ribeira Valley until the southern Sao Paulo State coastal plain
The complex exchange of fluvial, subsurface and seawater within a coastal area directly affects global biogeochemical cycles and the application of isotopic tracers, mainly natural radionuclides from U and Th series, is a powerful tool to track sources and sinks of trace elements and nutrients to this systems. The unique Ra signature applied to quantify the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/11/2010
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4. Processos hidrogeoquÃmicos em Ãguas subterrÃneas no cristalino em Caucaia/CE. ContribuiÃÃo da modelagem inversa atravÃs do PHREEQC. / Hydrogeochemical processes in groundwater in the crystalline Caucaia / CE. Contribution from inverse modeling by PHREEQC
The interaction between groundwater and rocks, occurs through processes of dissolution and precipitation that attest to the hydrochemical evolution within the aquifer system with direct influence on water quality. In this study, we used the application PHREEQC to simulate these processes in water from seven wells in crystalline collected during dry and wet,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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5. Assessment of hydrochemical quality of ground water under some urban areas within sana'a secreteriat
Groundwater from nine wells of three different districts, located at Sana'a secretariat was analyzed for hydrochemical quality assessment. Measurements of water quality parameters including pH, EC, CO3(2-), HCO3-, Cl-, NO3-, SO4(2-), Ca2+, Mg2+, Fe3+, K+, and Na+ were carried out . Classification of the groundwater samples according to Cl, SO4(2-), CO3(2-) a
Eclética Química. Publicado em: 2010
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6. Fluoride characterization by principal component analysis in the hydrochemical facies of Serra Geral Aquifer System in Southern Brazil
A Análise de Componentes Principais foi aplicada em 309 dados químicos de águas subterrâneas de poços do Sistema Aqüífero Serra Geral. Correlações entre sete parâmetros hidroquímicos foram examinadas através da estatística. O modelo de quatro componentes foi utilizado por explicar 81% da variância total. A Componente 1 é representada por água
Anais da Academia Brasileira de Ciências. Publicado em: 2008-12
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7. Groundwater quality assessment in a kaolin mining area: environmental impacts and remediation prospects, Mogi das Cruzes county, SP / Avaliação da qualidade da água subterrânea em área de mineração de caulim: impactos e perspectivas de remediação, município de Mogi das Cruzes, SP
The objective of this research was to evaluate the quality of groundwater in a kaolin mining in the municipality of Mogi das Cruzes/SP. The mining is inserted in the Water Catchment Protection Area of the Metropolitan Region of São Paulo and according to past descriptions, presented geochemical anomalies associated with aluminum, iron, manganese, zinc and s
Publicado em: 2007
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8. O impacto de uma lagoa receptora de efluentes industriais contendo boro em um aqüífero raso / Groundwater impact caused by an industrial effluente lagoon with boron
The boron (B) occurs naturally at low concentrations in surface and ground waters used to human supply and irrigation. Although concentration >1mg/L can cause health and environmental problems, detailed studies on transport and fate of B in aquifers are restricted in Brazil. This study investigated the impacts on groundwater quality caused by an industrial (
Publicado em: 2006
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9. The dynamics of groundwaters in the estuary of the River Itanhaem, the south coast of the State of São Paulo / A dinamica das aguas subterraneas no estuario do Rio Itanhaem, litoral sul do Estado de São Paulo
The present work studied the influence of the tide in the coastal aquifers by identifying hydrodynamic and chemical alterations in the aquifiers. The research was carried out in the Itanhaém river estuary in two localities: in the Sitio de Pesquisa with 7 installed wells situated on the banks of the Acima river, 3,5 km from the ocean, and in the CePeRio - C
Publicado em: 2006
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10. Characterization of the aquifers in the crystalline environment on the west plot of the Alto Tiete Basin. / Caracterização dos aqüíferos em meio cristalino da porção oeste da Bacia do Alto Tietê
An area of 1140 km2 in the Alto Tietê basin, downstream from the city of São Paulo, between UTM coordinates 7420/7382 km South and 298/328 km West, was studied in order to characterize the fissural aquifers of the region and correlate hydrogeological parameters with diverse other factors conditioning productivity. The area includes geological compartments
Publicado em: 2005
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11. ANALYSIS OF THE VULNERABILITY TO THE SALINIZATION OF SÃO LUÍS UNDERGROUND WATERS : Study of case in the area Itaquí - Bacanga / A ANÁLISE DA VULNERABILIDADE À SALINIZAÇÃO DAS ÁGUAS SUBTERRÂNEAS DA ILHA DE SÃO LUÍS: Estudo de caso na área Itaquí - Bacanga
A vulnerabilidade à salinização das águas subterrâneas na área Itaquí Bacanga, consequência da super explotação de aquíferos costeiros provoca, em geral, o fenômeno de intrusão salina, decorrente do avanço da interface água doce/água salgada, podendo ocorrer uma situação de contaminação generalizada. O uso de metodologias tradicionais par
Publicado em: 2004
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12. Modelagem computacional e anÃlise da salinizaÃÃo dos aqÃÃferos na Ãrea central de Recife
Groundwater is an important water source either for usual exploitation or to be kept as a strategic reserve, regionally and locally, and it needs to be protected. Groundwater quality depends on social and economic activities, depends on land use, and groundwater contamination has become more frequent. Nowadays salinization is the most common type of groundwa
Publicado em: 2004