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(1 - 5 of 5)
- Title
- CONTROLS ON ARSENIC CONCENTRATIONS IN GROUNDWATER AT A FORMER GOLF COURSE IN BOCA RATON, FLORIDA.
- Creator
- Watson, D.S. Monty, Root, Tara L., Florida Atlantic University, Department of Geosciences, Charles E. Schmidt College of Science
- Abstract/Description
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Arsenic is a known carcinogen, but is persistent in the environment, remaining a popular pesticide. It represents a particular hazard to humans when it stays resident in shallow soils and groundwater. This study of contaminant hydrogeology examined conditions at a former golf course in Florida with known arsenic contamination, and included a detailed examination of existing assessment data for the study area, an experimental pumping test with groundwater sampling, examination of sediment...
Show moreArsenic is a known carcinogen, but is persistent in the environment, remaining a popular pesticide. It represents a particular hazard to humans when it stays resident in shallow soils and groundwater. This study of contaminant hydrogeology examined conditions at a former golf course in Florida with known arsenic contamination, and included a detailed examination of existing assessment data for the study area, an experimental pumping test with groundwater sampling, examination of sediment cores, and a preliminary geophysical investigation. The primary purpose was to determine what the existing controls are on As mobility. The primary findings were that redox conditions did have an effect on As concentrations. Groundwater in the study area is generally reducing, but during the pumping test was generally oxidizing. No potential As sources were definitively identified, and the most likely source remains anthropogenic, but interactive conditions with Fe, Mn, NO3-N, and S remain nebulous.
Show less - Date Issued
- 2020
- PURL
- http://purl.flvc.org/fau/fd/FA00013574
- Subject Headings
- Hydrogeology--Florida, Boca Raton (Fla), Groundwater--Arsenic content, Arsenic--Analysis
- Format
- Document (PDF)
- Title
- Investigating variability of biogenic gas dynamics in peat soils using high temporal frequency hydrogeophysical methods.
- Creator
- Wright, William J., Charles E. Schmidt College of Science, Department of Geosciences
- Abstract/Description
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Peat soils are known to be a significant source of atmospheric greenhouse gasses. However, the releases of methane and carbon dioxide gasses from peat soils are currently not well understood, particularly since the timing of the releases are poorly constrained. Furthermore, most research work performed on peatlands has been focused on temperate to sub-arctic peatlands, while recent works have suggested that gas production rates from low-latitude peat soils are higher than those from colder...
Show morePeat soils are known to be a significant source of atmospheric greenhouse gasses. However, the releases of methane and carbon dioxide gasses from peat soils are currently not well understood, particularly since the timing of the releases are poorly constrained. Furthermore, most research work performed on peatlands has been focused on temperate to sub-arctic peatlands, while recent works have suggested that gas production rates from low-latitude peat soils are higher than those from colder climates. The purpose of the work proposed here is to introduce an autonomous Ground Penetrating Radar (GPR) method for investigating the timing of gas releases from peat soils at the lab scale utilizing samples originating from Maine and the Florida Everglades, and at the field scale in a Maine peatland. Geophysical data are supported by direct gas flux measurements using the flux chamber method enhanced by timelapse photography, and terrestrial LiDAR (TLS) monitoring surface deformation.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3361256
- Subject Headings
- Gas dynamics, Wetland ecology, Soil permeability, Estuarine sediments, Ground penetrating radar, Hydrogeology, Geophysics
- Format
- Document (PDF)
- 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.
Show less - 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)
- 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
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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.
Show less - 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)
- 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
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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.
Show less - Date Issued
- 2011
- PURL
- http://purl.flvc.org/FAU/3329830
- Subject Headings
- Groundwater flow, Simulations, Groundwater flow, Hydrogeology, Aquifiers
- Format
- Document (PDF)
