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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)
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)
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)
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)
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)
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)
Using geographic information systems to produce time area diagrams for the Clark Hydrograph Method
Title
Using geographic information systems to produce time area diagrams for the Clark Hydrograph Method.
Creator
Kohler, Michael Francis, Florida Atlantic University, Restrepo, Jorge I., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
Methodologies in GIS are used to compute stream flows for a watershed in Northern California by implementing the Clark Hydrograph Method. GIS algorithms are used to produce time area diagrams with time of concentration formula. These methods are compared to a simulation in HEC-HMS with the dimensionless TAD equation and the ModClark Method. Each GIS method is used to estimate the hydrograph for a measured rainfall event. The accuracy of each of the methods is explored using the HEC objective...
Show moreMethodologies in GIS are used to compute stream flows for a watershed in Northern California by implementing the Clark Hydrograph Method. GIS algorithms are used to produce time area diagrams with time of concentration formula. These methods are compared to a simulation in HEC-HMS with the dimensionless TAD equation and the ModClark Method. Each GIS method is used to estimate the hydrograph for a measured rainfall event. The accuracy of each of the methods is explored using the HEC objective function, mean squared error, and other statistical measures of correlation. Advantages and limitations of the GIS methodologies are examined and topics of further study are suggested.
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Date Issued
2001
PURL
http://purl.flvc.org/fcla/dt/12769
Subject Headings
Geographic information systems, Hydrology
Format
Document (PDF)
FAU Climate Change Initiative Priority Theme: Research, Engineering, and Adaption to a Change Climate
Title
FAU Climate Change Initiative Priority Theme: Research, Engineering, and Adaption to a Change Climate.
Creator
Berry, Leonard, Koch, Marguerite, Center for Environmental Studies, Benscoter, Brian, Comas, Xavier, Devlin, Donna, Fadiman, Maria, Gerstein, E., Herzing, Denise L., Hindle, Tobin, Milton, Sarah L., Oleinik, Anton E., Proffitt, C. Edward, Restrepo, Jorge I., Root, Tara L., Wyneken, Jeanette, Xie, Zhixiao, Zhang, Xing-Hai, Esnard, Ann-Margaret, Mitsova, Diana, Murley, J., Vos, J., Escaleras, Monica, Mehallis, M., Shaw, Eric H., Hardman, Guillermo [John], Lambert, Julie, Thomas, G., Arockiasamy, Madasamy, Bloetscher, Frederick, Carvalho, G., Dhanak, Manhar R., Frisk, George V., Kaisar, Evangelos I., Kalva, Hari, Meeroff, Daniel E., Rodriguez, Jarice, Scarlatos, Panagiotis (Pete) D., Shankar, Ravi, Teegavarapu, Ramesh, Brown, Clifford T., McAfee, Francis, Widener, Patricia, Dalgleish, Fraser R., Hanisak, M. Dennis, McMulloch, S., O'Corry-Crowe, Gregory, Pomponi, Shirley A., Reed, John K., Scarpa, John, Voss, Joshua, Heimlich, Barry N., Alvarez, R., Jolley, J., Edwards, A., Charles E. Schmidt College of Science, Harbor Branch Oceanographic Institute, College of Business, Dorothy F. Schmidt College of Arts and Letters, College of Education, College of Engineering and Computer Science
Date Issued
2010
PURL
http://purl.flvc.org/fau/fd/FA00003457
Format
Citation