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 43 for “"Groundwater Modeling"”.
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Groundwater modeling of the Aberjona Basin
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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Three-dimensional transient groundwater modeling of the Aberjona watershed
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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An Automated Three-Dimensional Unstructured Mesh Generation Algorithm for Groundwater Modeling
… interface for the algorithm was developed in the Groundwater Modeling System.
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Groundwater Modeling of Managed Aquifer Recharge at the Regional and Local Scale
… local model simulated a greater impact to the groundwater levels from the proposed recharge.
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Groundwater Modeling and Hydrogeological Parameter Estimation: Potomac Aquifer System, SWIFT Research Center
… the Potomac Aquifer System due to unsustainable groundwater withdrawals. At the SWIFT Research Center (SWIFTRC) in Nansemond, VA, a pilot testing well (TW-1) has been implemented to help determine the feasibility of full-scale implementation. The pumping data from TW-1 and observation head data …
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Groundwater modeling to predict plume migration and to design a well fence for a fuel spill at the Massachusetts Military Reservation
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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INFLUENCE OF ADSORPTION AND OXYGEN LIMITED BIODEGRADATION ON THE TRANSPORT AND FATE OF A CREOSOTE PLUME: FIELD METHODS AND SIMULATION TECHNIQUES (HYDROCARBON, GROUNDWATER, MODELING, TRACER TEST)
Field monitoring at the United Creosoting Company (UCC) site in Conroe, TX has shown that the shallow aquifer has become contaminated by leakage from two unlined ponds. A plume of hydrocarbon contaminated ground water is present and is contained within a large plume of elevated chloride …
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Comparisons of Hydrogeologic Modeling Methods to Define Capture Zones for Public Water Supply Wells in Northern Arkansas
… more complex and resource consuming methods for groundwater modeling has been in question since computer based groundwater modeling was established (Anderson, 1992). In many situations, computer modeling of groundwater flow is a necessity and useful for extrapolating data where none exists or it …
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INTEGRATED AQUIFER VULNERABILITY ASSESSMENT OF NITRATE CONTAMINATION IN CENTRAL INDIANA
Groundwater is not easily contaminated, but it is difficult to restore once contaminated. Therefore, groundwater management is important to prevent pollutants from reaching groundwater. A common step in developing groundwater management plans is assessment of aquifer risk using computational …
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Impact of uncertain input on parameter estimation in groundwater model
… and probably the most challenging aspect of groundwater modeling. In the context of groundwater modeling, although many studies have focused on parameter estimation problems, these issues are far from being solved. When important hydrogeological parameters like transmissivity and storativity …
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Three Dimensional Modeling Of Wekiva Springshed With Wash123d
This thesis presents a three-dimensional groundwater modeling of Wekia springshed in central Florida using a numerical model, WASH123D. Springs have historically played an important role in Florida's history. The Wekiva River is a spring-fed system associated with about 19 springs connected to the …
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Estudio y comportamiento de la interfaz salina en medios porosos considerando densidad variable: caso estudio: acuífero del Salar de Atacama, II Región de Antofagasta, Chile
… modelos hipotéticos mediante el software Groundwater Modeling System (GMS) y utilizando el código SEAWAT para la resolución de las ecuaciones, determinando en una primera parte los alcances en el proceso de construcción del modelo, para posteriormente estudiar el comportamiento de la …
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Sequential Electron Acceptor Model of Intrinsic Bioremediation at a BTEX Contaminated LUST Site in Laurel Bay, South Carolina
Contaminant transport modeling is being used more often at petroleum hydrocarbon contaminated sites in an attempt to aid engineers in evaluating the feasibility of natural attenuation as a remediation alternative in groundwater systems. In this research, a three-dimensional sequential electron …
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A spatial decision support system for basin scale assessment of improved management of water quantity and quality in stream-aquifer systems
… objectives based on conjunctive surface and groundwater modeling within the complex administrative and legal framework of river basin management. The River GeoDSS provides sophisticated tools that allow accurate system simulations and evaluation of strategies while minimizing the …
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Evaluating surface water–groundwater interactions in floodplains using SWAT+ and gwflow
… services. Within floodplains, surface water-groundwater exchange plays an important role in facilitating biogeochemical processing and can have a strong influence on hydrology through infiltration or discharge of water. These functions can be difficult to assess due to the heterogeneity of …
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Modeling biotic and abiotic decay of trichloroethylene (TCE) using the Reactive Multi-Species Transport in 3-Dimensional Groundwater Aquifers (RT3D) code
… TCE, is vital to improving the health of groundwater systems. TCE contamination of groundwater systems is of significant concern and its removal a significant challenge. One of the main causes of delays in cleanup of a TCE contaminated site results from back diffusion. Back diffusion …
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Heterogeneity effects on flow and transport within a shallow fluvial aquifer
… numerically at two scales using high resolution groundwater models. Heterogeneity effects on river loss were evaluated at the kilometer scale using stochastic, geostatistical models with grid cells on the order of several meters. It was found that river loss decreased directly with an increase in …
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Assessment of scaling and information requirements of the classical advection dispersion equation and a temporal-nonlocal advection dispersion equation at the MADE site, An
… immobile for certain periods of time. Transport modeling insufficiencies have led to two additional areas of research: collecting more hydraulic conductivity ($K$) data to better define subsurface heterogeneities and modifying the ADE to account for anomalous transport. This study seeks to …
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Modeling contaminant transport and fate and subsequent impacts on ecosystems
… surface diffusion was incorporated into the Groundwater Modeling System (GMS) to accurately simulate metal contaminant mobility where oxides are present. In the model development, the parabolic concentration layer approximation and the operator split technique were used to solve the …
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On Enforcing Maximum Principles and Element-Wise Species Balance for Advective-Diffusive-Reactive Systems
… an ideal candidate for predictive simulations in groundwater modeling, reactive transport, environmental fluid mechanics, and modeling of degradation of materials. The framework can also be utilized to numerically obtain scaling laws for complicated problems with non-trivial initial and boundary …
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