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Variations in model discretization methodology and its effects upon groundwater modeling
Title
Variations in model discretization methodology and its effects upon groundwater modeling.
Creator
Whitman, Jason L., Florida Atlantic University, Restrepo, Jorge I.
Abstract/Description
It is a fundamental supposition in groundwater modeling that as the discretization of a model domain is increased, the model's precision increases accordingly (Anderson and Woessner, 1992). However, the quantifiable amount and specific circumstances of that benefit remain unclear. The purpose of this research is to examine the output variations discerned as a result of applying successively coarsened discretization scenarios to a groundwater model test case. The test models, comprised of both...
Show moreIt is a fundamental supposition in groundwater modeling that as the discretization of a model domain is increased, the model's precision increases accordingly (Anderson and Woessner, 1992). However, the quantifiable amount and specific circumstances of that benefit remain unclear. The purpose of this research is to examine the output variations discerned as a result of applying successively coarsened discretization scenarios to a groundwater model test case. The test models, comprised of both regular (square) and irregular forty-four individual model output solutions. Detailed analysis of the piezometric head values, mass balance flow terms, and solution convergence times for each model run provides valuable insight into the complex relationship existing between spatial discretization and its effect upon model output values. Consequently, the aforementioned relationship proves to be highly complex, often affecting multiple model parameters in dissimilar manners while maintaining consistency in others.
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Date Issued
1999
PURL
http://purl.flvc.org/fcla/dt/15750
Subject Headings
Groundwater flow--Computer simulation, Groundwater flow--Mathematical models
Format
Document (PDF)
Variability of dissolved reactive phosphate flux rates in nearshore estuarine sediments: Effects of groundwater flow
Title
Variability of dissolved reactive phosphate flux rates in nearshore estuarine sediments: Effects of groundwater flow.
Creator
Zimmermann, Carl F., Montgomery, John R., Carlson, Paul R., Harbor Branch Oceanographic Institute
PURL
http://purl.flvc.org/FCLA/DT/3174856
Subject Headings
Estuarine sediments, Phosphates, Groundwater flow
Format
Document (PDF)
Groundwater solute transport models for simulating the effects of a wellfield protection zone on contaminant transport
Title
Groundwater solute transport models for simulating the effects of a wellfield protection zone on contaminant transport.
Creator
Rueckert, William A., Florida Atlantic University, Restrepo, Jorge I.
Abstract/Description
The objective is to develop a groundwater flow model of the Surficial Aquifer System in the area of Plantation, Broward County, Florida, using the U.S. Geological Survey MODFLOW code and to make a comparison between the use of two supplementary contaminant transport models: MODPATH code and the MT3D code. The advantages and limitations of the two solute transport models are described and an evaluation is made of their accuracy with respect to delineation of traveltime related to capture zones...
Show moreThe objective is to develop a groundwater flow model of the Surficial Aquifer System in the area of Plantation, Broward County, Florida, using the U.S. Geological Survey MODFLOW code and to make a comparison between the use of two supplementary contaminant transport models: MODPATH code and the MT3D code. The advantages and limitations of the two solute transport models are described and an evaluation is made of their accuracy with respect to delineation of traveltime related to capture zones of wells. Final results of the computer simulations indicate that this study area is sensitive to river bed hydraulic conductivity and the stress of the continuous pumping at a nearby wellfield. Therefore, a critical factor in selecting an appropriate flow model for delineating the traveltime-related capture zone of a well is a model which simplifies the flow system while still preserving hydrogeologic characteristics of the flow system.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15073
Subject Headings
Pollutants, Groundwater flow--Computer simulation, Groundwater--Pollution, Aquifers--Florida--Broward County, Groundwater flow--Florida--Broward County
Format
Document (PDF)
Determination of wetland impact due to groundwater drawdown: The application of aerial photo-interpretation, GIS analysis, and groundwater modeling
Title
Determination of wetland impact due to groundwater drawdown: The application of aerial photo-interpretation, GIS analysis, and groundwater modeling.
Creator
Hindle, Tobin, Florida Atlantic University, Marsh, G. Alex
Abstract/Description
Aerial photo-interpretation, GIS analysis, and groundwater modeling were employed to determine the impact of permitted groundwater withdrawal, primarily for agricultural irrigation, on protected wetland communities within Jonathan Dickinson State Park (JDSP), Martin County Florida. Since 1952, much of the wetland habitat has succeeded to terrestrial pine flatwoods in the southwestern section of the wilderness preserve of JDSP. The drying trend can not be linked to natural hydrologic impact,...
Show moreAerial photo-interpretation, GIS analysis, and groundwater modeling were employed to determine the impact of permitted groundwater withdrawal, primarily for agricultural irrigation, on protected wetland communities within Jonathan Dickinson State Park (JDSP), Martin County Florida. Since 1952, much of the wetland habitat has succeeded to terrestrial pine flatwoods in the southwestern section of the wilderness preserve of JDSP. The drying trend can not be linked to natural hydrologic impact, but strongly correlates to groundwater drawdown calculated using a three-dimensional groundwater computer model.
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Date Issued
1997
PURL
http://purl.flvc.org/fcla/dt/15465
Subject Headings
Groundwater flow--Computer simulation, Geographic information systems, Wetland hydrology
Format
Document (PDF)
Infrastructure to model complex systems: hydrological modeling
Title
Infrastructure to model complex systems: hydrological modeling.
Creator
Wissinger, Frank, Shankar, Ravi, Florida Atlantic University, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
This research proposes an Infrastructure to model complex systems for hydrological modeling. Currently, the three main hydrological packages are: i) SEAWAT (modeling groundwater flow); ii) HECRAS (modeling surface water flow); iii) HEC-HMS (modeling atmospheric water flow). Each of these models is self-contained and has a different timescale and simulation speed. Consequently, any integrated model will only run as fast as the slowest of the models. This makes it difficult to provide reliable...
Show moreThis research proposes an Infrastructure to model complex systems for hydrological modeling. Currently, the three main hydrological packages are: i) SEAWAT (modeling groundwater flow); ii) HECRAS (modeling surface water flow); iii) HEC-HMS (modeling atmospheric water flow). Each of these models is self-contained and has a different timescale and simulation speed. Consequently, any integrated model will only run as fast as the slowest of the models. This makes it difficult to provide reliable and dynamic information on water levels and water availability for a given geographical region in a timely manner. The goal of this research is to facilitate the integration of multiple hydrological models from different hydrological packages by applying Electronic Design Automation (EDA) methodologies, including System Level Design (SLD) methodology, SystemC-AMS language, Python language and libraries (numpy, Statsmodels, and ctypes). The EDA methodology brings in the additional advantage of significantly improved simulation speed. The Infrastructure to Model Complex Systems applications is demonstrated using the following SEAWAT benchmark problems: i) Case 1; ii) Henry; iii) Elder problem. Simulation results from the aforementioned benchmarks are analyzed and discussed. Lastly, future research work is presented.
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Date Issued
2014
PURL
http://purl.flvc.org/fau/fd/FA00004338, http://purl.flvc.org/fau/fd/FA00004338
Subject Headings
Floodplain management, Groundwater -- Environmental aspects, Groundwater flow -- Computer simulation., Water resources development
Format
Document (PDF)
Application of probabilistic analogy to groundwater contamination problems
Title
Application of probabilistic analogy to groundwater contamination problems.
Creator
Qiu, Xin., Florida Atlantic University, Su, Tsung-Chow, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
This thesis addresses the groundwater contamination problem from a probabilistic point of view. The objective of this study is to obtain analytical solutions for the backward type Kolmogorov equations governing certain crucial variables in the case of a two-dimensional medium. These include the rate at which pollutants enter the protected zone and the length of time that a pollutant particle takes to travel from a given location to the boundary of the protected zone. It is assumed that the...
Show moreThis thesis addresses the groundwater contamination problem from a probabilistic point of view. The objective of this study is to obtain analytical solutions for the backward type Kolmogorov equations governing certain crucial variables in the case of a two-dimensional medium. These include the rate at which pollutants enter the protected zone and the length of time that a pollutant particle takes to travel from a given location to the boundary of the protected zone. It is assumed that the groundwater flow is horizontal and uniform, and that a protected zone is located downstream. Analytical solutions are obtained by using the techniques of Laplace transform and separation of variables. Numerical results are given for two cases, one with flow coming from a boundary which is imperious to the pollutant, and another with flow coming from infinity.
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Date Issued
1993
PURL
http://purl.flvc.org/fcla/dt/14980
Subject Headings
Groundwater--Pollution--Mathematical models, Groundwater flow--Mathematical models, Pollutants
Format
Document (PDF)
Experimental and numerical analysis of solute transport through saturated porous media
Title
Experimental and numerical analysis of solute transport through saturated porous media.
Creator
Ranganathan, Sridhar., Florida Atlantic University, Abtahi, Homayoon, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
The problem of solute transport through saturated porous media is considered in this thesis. The end application of this study is to evaluate the option of spray irrigation as a means of disposing reverse osmosis effluent. Reverse osmosis effluent was sprayed on an experimental field composed of typical area soil. The changes in groundwater quality were monitored at intervals of ten to twenty days. Applying the experimentally obtained data to a basic numerical model, which uses the convection...
Show moreThe problem of solute transport through saturated porous media is considered in this thesis. The end application of this study is to evaluate the option of spray irrigation as a means of disposing reverse osmosis effluent. Reverse osmosis effluent was sprayed on an experimental field composed of typical area soil. The changes in groundwater quality were monitored at intervals of ten to twenty days. Applying the experimentally obtained data to a basic numerical model, which uses the convection-diffusion equation, the key parameter of the soil, D* the diffusion coefficient, is obtained for the Myakka sand. While the numerical model can predict the qualitative behavior of hardness and conductivity, hysteresis is observed for the response of the total organic carbon (TOC) content. Further studies are needed to understand and model the inherent capacitance of the soil for hardness and the observed hysteresis in TOC response.
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Date Issued
1990
PURL
http://purl.flvc.org/fcla/dt/14629
Subject Headings
Groundwater flow, Groundwater--Quality, Water--Purification--Reverse osmosis process
Format
Document (PDF)
Collection and analyses of physical data for deep injection wells in Florida
Title
Collection and analyses of physical data for deep injection wells in Florida.
Creator
Gao, Jie., College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
Deep injection wells (DIW) in Florida are regulated by the U.S. Environmental Protection Agency (USEPA) and the state of Florida through the Underground Injection Control regulations contained within the Safe Drinking Water Act. Underground injection is defined as the injection of hazardous waste, nonhazardous waste, or municipal waste below the lowermost formation containing an underground source of drinking water within one-quarter mile of the wellbore. Municipalities in Florida have been...
Show moreDeep injection wells (DIW) in Florida are regulated by the U.S. Environmental Protection Agency (USEPA) and the state of Florida through the Underground Injection Control regulations contained within the Safe Drinking Water Act. Underground injection is defined as the injection of hazardous waste, nonhazardous waste, or municipal waste below the lowermost formation containing an underground source of drinking water within one-quarter mile of the wellbore. Municipalities in Florida have been using underground injection as an alternative to surface disposal of treated domestic wastewater for nearly 40 years. The research involved collecting data as of September, 2007 on all the Class I DIWs in the state of Florida and evaluating the differences between them. The analysis found regional differences in deep well practice and canonical correlation analyses concluded that depth below the USDW is the most significant factor to prevent upward migration of the injected fluid.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/2796085
Subject Headings
Groundwater flow, Mathematical models, Artificial groundwater recharge, Groundwater, Pollution, Management, Deep-well disposal
Format
Document (PDF)
Application of canal locations within grid cells to the study of surface water-groundwater interaction
Title
Application of canal locations within grid cells to the study of surface water-groundwater interaction.
Creator
Sosnowski, Robert Joseph., Florida Atlantic University, Restrepo, Jorge I.
Abstract/Description
Within St. Lucie County, Florida, a network of canals has been cut to provide flood protection, drainage, and irrigation. Many of these canals maintain a permanent to semi-permanent hydraulic connection with the surficial aquifer. MODFLOW code was used to simulate St. Lucie County groundwater levels. One of stresses that contributed to the solution of the groundwater levels, was the volume of water that flowed into or out of the aquifer through the canal system. In MODFLOW, the flow...
Show moreWithin St. Lucie County, Florida, a network of canals has been cut to provide flood protection, drainage, and irrigation. Many of these canals maintain a permanent to semi-permanent hydraulic connection with the surficial aquifer. MODFLOW code was used to simulate St. Lucie County groundwater levels. One of stresses that contributed to the solution of the groundwater levels, was the volume of water that flowed into or out of the aquifer through the canal system. In MODFLOW, the flow calculation between a canal and the aquifer is independent of the canal's location within the grid cell. The flow calculation was modified to incorporate canal location. Simulation results showed 34 percent of the model area realized groundwater levels that were plus or minus two-tenths to one-half foot when compared to the original levels. These results can be significant for model applications such as wetland protection and salt water intrusion.
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Date Issued
1999
PURL
http://purl.flvc.org/fcla/dt/15651
Subject Headings
Groundwater flow--Mathematical models, Canals--Florida--St Lucie County, Aquifers
Format
Document (PDF)
evaluation of the U.S.E.P.A. model MULTIMED and applicability to hydrogeologic conditions in Florida
Title
An evaluation of the U.S.E.P.A. model MULTIMED and applicability to hydrogeologic conditions in Florida.
Creator
Martin, Robert Floyd, Jr., Florida Atlantic University, Restrepo, Jorge I.
Abstract/Description
The U.S. Environmental Protection Agency's program, MULTIMED, was evaluated using a parametric analysis and result comparisons the with programs MODFLOW and MT3D. The validity and accuracy of the MULTIMED model results were determined and independent parameter sensitivities identified. The dilution calculations in the model are sensitive to several parameters. A parameter determined critical is the seepage velocity which is used in the transport calculations of the model, as well as a "Near...
Show moreThe U.S. Environmental Protection Agency's program, MULTIMED, was evaluated using a parametric analysis and result comparisons the with programs MODFLOW and MT3D. The validity and accuracy of the MULTIMED model results were determined and independent parameter sensitivities identified. The dilution calculations in the model are sensitive to several parameters. A parameter determined critical is the seepage velocity which is used in the transport calculations of the model, as well as a "Near Mixing Factor". Under Florida's aquifer conditions, the Near Mixing Factor as calculated in the model is susceptible to overestimating the dilution of the initial concentration due to relatively high recharge rates and low hydraulic conductivities. Florida's aquifer conditions also typically result in Near Mixing Factor values greater than one, for which the model's analytical solutions are not valid.
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Date Issued
1995
PURL
http://purl.flvc.org/fcla/dt/15158
Subject Headings
Sanitary landfills--Leaching--Computer simulation, Environmental Sciences, Groundwater flow--Florida
Format
Document (PDF)
MODFLOW wetland module which relates interactions with aquifers and sloughs
Title
MODFLOW wetland module which relates interactions with aquifers and sloughs.
Creator
Montoya, Angela M., Florida Atlantic University, Restrepo, Jorge I.
Abstract/Description
Natural and anthropogenic processes have altered wetland habitats. The simulation of surface water movement and its interaction with groundwater and slough channels as it relates to wetlands is very important for many projects. Currently, most groundwater flow models incorporate the wetland system as general head boundary nodes. The purpose of this research was to develop a computer package for the widely used MODFLOW code to simulate three-dimensional wetland flow hydroperiods interacting...
Show moreNatural and anthropogenic processes have altered wetland habitats. The simulation of surface water movement and its interaction with groundwater and slough channels as it relates to wetlands is very important for many projects. Currently, most groundwater flow models incorporate the wetland system as general head boundary nodes. The purpose of this research was to develop a computer package for the widely used MODFLOW code to simulate three-dimensional wetland flow hydroperiods interacting with aquifers and slough channels. The groundwater flow model was used to reproduce surface water flow process through wetlands, estimating new flow rates and values using a Manning type of equation. This package represents flow routing, the export/import of water, and the evapotranspiration from wetlands during different hydroperiods. The verification procedure for the numerical solution was based on a test-case that was solved using a two-dimensional surface water model. This test-case example is a transient solution to the diffusion equation starting with initial conditions depicted by a sinusoidal water surface profile and a flat bottom.
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Date Issued
1997
PURL
http://purl.flvc.org/fcla/dt/15440
Subject Headings
Groundwater flow--Models, Wetlands--Mathematical models, Aquifers, Hydrologic models
Format
Document (PDF)
Analysis of Backgroundwater Chemistry and Local Hydrologic Conditions ofPondhawk Natural Area Pre-Wetland Construction
Title
Analysis of Backgroundwater Chemistry and Local Hydrologic Conditions ofPondhawk Natural Area Pre-Wetland Construction.
Creator
Carlson, Eric Sven, Root, Tara L., Florida Atlantic University
Abstract/Description
This thesis evaluates the water chemistry and hydrology of an urban environmental preserve in advance of wetland construction. Pondhawk Natural Area (PNA) is located in densely populated Palm Beach County, Florida and was acquired through the County's Environmentally Sensitive Lands Acquisition Program as a protected natural area. In an effort to restore the natural area to pre-development conditions Palm Beach County will construct a wetland in the area where hydric conditions persisted...
Show moreThis thesis evaluates the water chemistry and hydrology of an urban environmental preserve in advance of wetland construction. Pondhawk Natural Area (PNA) is located in densely populated Palm Beach County, Florida and was acquired through the County's Environmentally Sensitive Lands Acquisition Program as a protected natural area. In an effort to restore the natural area to pre-development conditions Palm Beach County will construct a wetland in the area where hydric conditions persisted prior to the extensive canal construction that lowered groundwater levels. Results of this study wi II provide initial characterization of hydrology and water quality of PNA before wetland construction and lay the groundwork for future monitoring and improvements.
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Date Issued
2008
PURL
http://purl.flvc.org/fau/fd/FA00000730
Subject Headings
Soil chemistry--Florida--Palm Beach County, Water chemistry--Florida--Palm Beach County, Wetland hydrology--Florida--Palm Beach County, Groundwater flow--Florida--Palm Beach County
Format
Document (PDF)
Methodology for Estimating the Magnitude, and Spatial and Temporal Variation of Irrigation Demand on the Floridan Aquifer System within the Upper East Coast Planning Area, Florida
Title
Methodology for Estimating the Magnitude, and Spatial and Temporal Variation of Irrigation Demand on the Floridan Aquifer System within the Upper East Coast Planning Area, Florida.
Creator
Quinn, Elizabeth, Restrepo, Jorge I., Florida Atlantic University
Abstract/Description
A method was developed to estimate the magnitude and spatio-temporal variation of agricultural demand from the Floridan Aquifer System (F AS) in the Upper East Coast (UEC) planning area, Florida. The Irrigation Program (IP) is designed to compute total irrigation requirements and model demand from permitted water sources. Historical Natural Resources Conservation Service well-flow data are used in calibration. The IP is most sensitive to spatio-temporal variation of water levels in major...
Show moreA method was developed to estimate the magnitude and spatio-temporal variation of agricultural demand from the Floridan Aquifer System (F AS) in the Upper East Coast (UEC) planning area, Florida. The Irrigation Program (IP) is designed to compute total irrigation requirements and model demand from permitted water sources. Historical Natural Resources Conservation Service well-flow data are used in calibration. The IP is most sensitive to spatio-temporal variation of water levels in major canals and the range of days for the wet and dry season. The magnitude of deficit in simulated and historical withdrawal from the FAS is 199,000 fe/day. This is within 7% of historical data. A correction factor should be introduced when the IP is linked to a groundwater flow model.
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Date Issued
2007
PURL
http://purl.flvc.org/fau/fd/FA00000816
Subject Headings
Groundwater flow--Florida--Upper East Coast--Mathematical models, Hydrogeology--Florida--Upper East Coast, Irrigation water--Mathematical models
Format
Document (PDF)
Investigation of flow patterns using geochemical tracers in the Floridan aquifer system, Naples, Florida
Title
Investigation of flow patterns using geochemical tracers in the Floridan aquifer system, Naples, Florida.
Creator
Rectenwald, E. Edward., Florida Atlantic University, Warburton, David L.
Abstract/Description
This study investigated flow patterns in the FAS and tested Kohout's theory of "cyclic flow" in the vicinity of Naples, Florida. Temperature logs were analyzed to identify a reverse geothermal gradient in the Floridan aquifer system. The geochemical analysis consisted of inorganics (major cations and anions), stable isotopes (2H, 18O), radiocarbon (14C), and noble gas (He, Ne, Ar, Kr, Xe) data. The temperature logs were inconclusive in identifying a reverse geothermal gradient in the study...
Show moreThis study investigated flow patterns in the FAS and tested Kohout's theory of "cyclic flow" in the vicinity of Naples, Florida. Temperature logs were analyzed to identify a reverse geothermal gradient in the Floridan aquifer system. The geochemical analysis consisted of inorganics (major cations and anions), stable isotopes (2H, 18O), radiocarbon (14C), and noble gas (He, Ne, Ar, Kr, Xe) data. The temperature logs were inconclusive in identifying a reverse geothermal gradient in the study area. The geochemical analysis suggests that within the FAS relatively old meteoric freshwater circulates in the UFA over relatively young seawater of the MCU and LFA. The analysis also supports the possibility of vertical flow from the LFA to the UFA in the study area along with ancient meteoric recharge into the UFA during the last glacial period. The study was inconclusive in identifying "cyclic flow" in the study area.
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Date Issued
2006
PURL
http://purl.flvc.org/fcla/dt/13356
Subject Headings
South Florida Water Management District (Fla ), Water quality--Florida--Naples--Measurement, Hydrogeology--Florida--Naples, Geomorphological tracers--Utilization, Groundwater flow--Florida--Naples
Format
Document (PDF)
Geochemical conditions and groundwater-surface interactions within a municipal well field in Miami-Dade County, Florida
Title
Geochemical conditions and groundwater-surface interactions within a municipal well field in Miami-Dade County, Florida.
Creator
Antolino, Dominick J., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
This thesis presents a preliminary study on geochemical conditions within the Snapper Creek well field in Miami-Dade County, Florida. The study investigates the background groundwater chemistry within the Biscayne aquifer in order to provide information on the geochemical processes and water-rock interactions within the study site. In conjunction with hydraulic gradient information, major ion chemistry and deuterium and oxygen-18 data were used as environmental tracers to help describe the...
Show moreThis thesis presents a preliminary study on geochemical conditions within the Snapper Creek well field in Miami-Dade County, Florida. The study investigates the background groundwater chemistry within the Biscayne aquifer in order to provide information on the geochemical processes and water-rock interactions within the study site. In conjunction with hydraulic gradient information, major ion chemistry and deuterium and oxygen-18 data were used as environmental tracers to help describe the groundwater-surface water interactions between the well field and the Snapper Creek canal. Hydrologic data show there is potential for natural groundwater recharge from the canal within the shallow flow zone of the Biscayne aquifer and chemical data show evidence of canal-groundwater mixing within this zone. The limitations for the v environmental tracers employed within the study are addressed, as well as recommendations for further research involving natural geochemical tracers and groundwater-surface water interactions near municipal well fields. This study was part of a larger effort being conducted by the U.S. Geological Survey in order to assess municipal well field pumping effects on the Snapper Creek (C-2) canal.
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Date Issued
2011
PURL
http://purl.flvc.org/FAU/3329830
Subject Headings
Groundwater flow, Simulations, Groundwater flow, Hydrogeology, Aquifiers
Format
Document (PDF)
Three-dimensional geomodeling to identify spatial relations between lithostratigraphy and porosity in the karst carbonate biscayne aquifer, southeastern Florida
Title
Three-dimensional geomodeling to identify spatial relations between lithostratigraphy and porosity in the karst carbonate biscayne aquifer, southeastern Florida.
Creator
Westcott, Richard, Root, Tara L., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
In southeastern Florida, the majority of drinking water comes from the Biscayne aquifer. This aquifer is comprised of heterogeneous limestones, sandstones, sand, shell and clayey sand with zones of very high permeability. Visualizing the spatial variations in lithology, porosity and permeability of heterogeneous aquifers, like the Biscayne, can be difficult using traditional methods of investigation. Using the Roxar IRAP RMS software multi-layered 3D conceptual geomodels of the lithology,...
Show moreIn southeastern Florida, the majority of drinking water comes from the Biscayne aquifer. This aquifer is comprised of heterogeneous limestones, sandstones, sand, shell and clayey sand with zones of very high permeability. Visualizing the spatial variations in lithology, porosity and permeability of heterogeneous aquifers, like the Biscayne, can be difficult using traditional methods of investigation. Using the Roxar IRAP RMS software multi-layered 3D conceptual geomodels of the lithology, cyclostratigraphy and porosity were created in a portion of the Biscayne aquifer. The models were built using published data from borehole geophysical measurements, core samples, and thin sections. Spatial relations between lithology, cyclostratigraphy, porosity, and preferential flow zones were compared and contrasted to better understand how these geologic features were inter-related. The models show local areas of differing porosity within and cross-cutting different cycles and lithologies. Porosity in the Biscayne aquifer study area follows a hierarchy attributed to lithofacies with a pattern of increasing porosity for the high frequency cycles. This modeling improves understanding of the distribution and interconnectedness of preferential flow zones, and is thus an invaluable tool for future studies of groundwater flow and groundwater contamination in the Biscayne aquifer.
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Date Issued
2014
PURL
http://purl.flvc.org/fau/fd/FA00004337, http://purl.flvc.org/fau/fd/FA00004337
Subject Headings
Biscayne Aquifer (Fla.), Geophysics -- Florida -- Miami Dade County, Groundwater flow -- Florida -- Miami Dade County -- Mathematical models, Hydrology, Karst -- Florida -- Miami Dade County, Porosity, Sedimentary basins -- Florida -- Biscayne Aquifer, Sedimentology -- Statistical methods, Soil permeability
Format
Document (PDF)