Shallow Aquifer
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Constraints from magnetotellurics on the geological structure across a seismic area associated with water wells in the Paraná basin, Brazil
ABSTRACT: The occurrence of earthquakes associated with the opening of groundwater wells is a very rare phenomenon. We present the results from a magnetotelluric profile of about 4 km-long that crosses a seismic zone near the town of Bebedouro, in the Northeastern part of the intra-cratonic Paraná basin, in Brazil. The seismic activity is thought to be caus
Braz. J. Geol.. Publicado em: 13/01/2020
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2. Shallow aquifer response to climate change scenarios in a small catchment in the Guarani Aquifer outcrop zone
ABSTRACT Water availability restrictions are already a reality in several countries. This issue is likely to worsen due to climate change, predicted for the upcoming decades. This study aims to estimate the impacts of climate change on groundwater system in the Guarani Aquifer outcrop zone. Global Climate Models (GCM) outputs were used as inputs to a water b
An. Acad. Bras. Ciênc.. Publicado em: 2017-05
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3. Uso da tecnologia de troca iônica no tratamento de águas contaminadas com Nitrato do Aqüífero Dunas-Barreiras, Natal/RN-Brasil
The city of Natal comprises an area of about 170 km (65,63 squares miles). The Dunas-Barreiras Aquifer is the most important reservoir of the coastal basin of RN. It is being responsible for the water supplying of about 70% of the population, however, due to the sewage disposal system by cesspools and drains, it is presently affected in a great extent by nit
Publicado em: 2008
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4. Vulnerabilidade e risco à poluiÃÃo do sistema aqÃÃfero â entre Crato e MissÃo Velha, bacia do Araripe, Cearà / Vulnerability and risk to the pollution of the aquifer system - between Crato and MissÃo Velha, Araripe Basin, Brazil
It is increasing in the entire globe, the preoccupation with the environment, where we emphasize in this work the preoccupation with the vulnerability and risk to pollution of Medium Aquifer System in the region between Crato and MissÃo Velha towns, Cariri Valley, Araripe Basin, CearÃ. The studied area is located at the south portion of Cearà State, in th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2007
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5. Tridimensional modelling of groundwater flow in an unconfined, shallow aquifer in Parque Ecologico Tiete, São Paulo / Modelagem tridimensional de fluxo de águas subterrâneas em um aqüífero livre e raso: aplicação no Parque Ecológico do Tietê - São Paulo
The importance of studying unconfined and shallow aquifers is verified when taking into account that these aquifers are highly vulnerable to contamination and that they are often located under heavily populated regions. A detailed three-dimensional and transient model, which represents the groundwater flow in an area of an unconfined and shallow aquifer at t
Publicado em: 2007
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6. Estudo da variabilidade da piezometria dos aqüíferos freáticos na bacia do alto Rio Jardim - Distrito Federal
The objective of the present work is to increase the knowledge about the variability of the water table in porous shallow aquifer systems. The study area was the Rio Jardim watershed, situated in the southeast portion of the Federal District (Brazil) and characterized by intense agriculture use. The development of the research was based on monitoring wells w
Publicado em: 2007
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7. 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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8. Hidrogeoquimica e a contaminação por nitrato em agua subterranea no bairro Piranema, Seropedica - RJ / Geochemistry and the nitrate contamination of groundwater in Piranema neighborhood, Seropedica-RJ, Brazil
Nitrate is found in waters, vegetable and animal tissues. Due to man activities, the concentration of nitrate in waters has increased in the last decades and a maximum allowed value for drinkable water was established by regulatory agencies. A common source of aquifers contamination by the nitrate is the use of in situ sanitation systems, like as cesspits an
Publicado em: 2005
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9. Geological conditioning aspects for piezocone test interpretation for stratigraphical identification in geotechnical and geo-environmental site investigation / Condicionantes geológicos na interpretação de ensaios de piezocone para identificação estratigráfica na investigação geotécnica e geoambiental
In situ tests for geotechnical and geo-environmental site investigation embraces a variety of soundings and tests to map and define stratigraphic logging and specific design parameters for each kind of job. Stratigraphic logging and soil classification are a common stage to all investigation programs and frequently they are performed throughout logging tests
Publicado em: 2005
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10. Avaliação fisico-quimica e microbiologica da agua subterranea em area irrigada com efluente de filtro anaerobio
Groundwater physicochemical and microbiological evolution in irrigated area with anaerobic filter. Campinas, Civil Engineering College, Campinas State University, 2003. 1130pag. Master Dissertation. The main aim of effluent application on soil is to reduce, or eliminate the use of fertilizers and supply the water necessity. Proper leandling in the system is
Publicado em: 2003
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11. Entrainment of Viruses from Septic Tank Leach Fields Through a Shallow, Sandy Soil Aquifer
A study was conducted which focused on movement of naturally occurring human enteroviruses from a subsurface wastewater disposal system through a shallow aquifer. The potential for significant entrainment of virus particles was evidenced by their recovery at down-gradient distances of 67.05 m and from aquifer depths of 18 m. A significant negative correlatio
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12. Occurrence of fecal indicator bacteria in surface waters and the subsurface aquifer in Key Largo, Florida.
Sewage waste disposal facilities in the Florida Keys include septic tanks and individual package plants in place of municipal collection facilities in most locations. In Key Largo, both facilities discharge into the extremely porous Key Largo limestone. To determine whether there was potential contamination of the subsurface aquifer and nearby coastal surfac