Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 404 for “"Aquifers"”.
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Classification of Aquifers
… papers describing an approach to classifying aquifers and groundwater systems. The three papers bring together the development of a basin scale groundwater classification system that integrates the literature, data gathering, and data analysis and testing. The classification system is a …
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Classification of Aquifers
… papers describing an approach to classifying aquifers and groundwater systems. The three papers bring together the development of a basin scale groundwater classification system that integrates the literature, data gathering, and data analysis and testing. The classification system is a …
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Prediction of macrodispersivity in heterogeneous aquifers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1988.
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Tide-influenced contaminant transport in coastal aquifers
Coastal aquifers are distinguished from other aquifers because of tidal effects which cause complicated groundwater flow and contaminant transport phenomena in regions immediately adjacent to the coast. This study is designed to address the significance of tidal influence on contaminant transport …
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Hydrodynamics of Saltwater Intrusion in Heterogeneous Coastal Aquifers
… who are dependent on freshwater extracted from aquifers near to the sea. The sustainable management of coastal aquifers is crucial to prevent the degradation of freshwater resources by the landward intrusion of saltwater due to over-pumping and climate change. Difficulties arise when modelling …
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Seawater circulation in coastal aquifers : processes and impacts
… cycling in coastal oceans abutting permeable aquifers, where transport through sediments is dominated by advection, rather than diffusion. We investigate the mechanisms by which seawater circulates in the subsurface over a range of spatio-temporal scales, and the chemical reactions to which …
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Migration and trapping of CO₂ in saline aquifers
… large-scale injection of CO2 into deep saline aquifers. After injection, upward leakage of the CO2 is a primary concern because it will be buoyant relative to the ambient groundwater and, as a result, will rise toward the top of the aquifer and may migrate laterally away from the injection …
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Hydrogeological engineering approaches to investigate and characterize heterogeneous aquifers
This dissertation presents a compilation of five stand-alone manuscripts (Chapters 2 through 5 and Appendix A). Chapters 2 through 5 present hydrogeological analysis approaches, while Appendix A is utilized within the dissertation introduction as an example of a non-physically based modeling …
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SUB-SURFACE MIGRATION OF AN OIL POLLUTANT INTO AQUIFERS
The risk to groundwater quality following a sub-surface spillage of immiscible pollutants such as oil, petroleum and other organic chemicals is an increasingly potent threat, through escalating industrial application of such pollutants. This study significantly enhances the understanding of the …
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Transport of Kinetically Adsorbing Contaminants in Randomly Heterogeneous Aquifers
… for modeling solute transport in heterogeneous aquifers describes the natural variability in hydraulic conductivity by means of a stationary random field. Therefore, the solute concentration distribution at a given time also becomes a random field. For the case of an inert solute, Dagan found a …
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Macrodispersion and concentration fluctuations in three-dimensionally heterogeneous aquifers
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1993.
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The stochastic characterization of glacial aquifers using geologic information
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Numerical Simulation and Optimization of CO2 Sequestration in Saline Aquifers
<p>With heightened concerns on CO2 emissions from pulverized-coal power plants, there has been major emphasis in recent years on the development of safe and economical Geological Carbon Sequestration: GCS) technology. Although among one of the most promising technologies to address the problem of …
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Implications of geological carbon sequestration on shallow freshwater aquifers geochemistry
… through a statistical analysis of saline aquifers geochemistry, and applying a simple freshwater-brine mixing model. The impact of CO2 leakage on carbonate aquifers was addressed by conducting a series of pressurized experiments. In these experiments, natural carbonate rocks of different …
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Integrating carbon capture and storage with energy production from saline aquifers
… CO₂ from flue gas and injecting CO₂ into saline aquifers are energy intensive, costly, and technically challenging. Production of dissolved natural gas and geothermal energy by extraction of aquifer brine has shown the potential of offsetting the cost of CO₂ capture and storage along with other …
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Physical controls on water flow and solute transport in coastal aquifers
… flow and solute transport in near-shore aquifers. For the investigation of wave effects, a Computational Fluid Dynamics (CFD) modeling tool, Fluent, is used to simulate wave- induced sea level oscillations. A flow-averaged approach is developed to generalize wave motions acting onto the …
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Forecasting the Transport and Fate of Pharmaceuticals in Coarse Grained Aquifers
… work suggests that in coarse grained unconfined aquifers with rapid groundwater flow, low levels of some pharmaceutical compound can be present, especially carbamazepine and sulfamethoxazole. Other compounds are likely to degrade or sorb to sediments and are not anticipated to be present in …
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