Gerard J Gonthier (Former Employee)
Science and Products
Groundwater Monitoring Program for the Augusta–Richmond County Area, GA
Water supply in the Augusta–Richmond County, GA area is provided in part by three well fields that withdraw water from the Dublin–Midville aquifer system. The U.S. Geological Survey operates a groundwater-level and water-quality monitoring program to support water-management decisions and provide a basis for future groundwater modeling efforts while adding to regional characterization of...
Water-level data and results for slug tests performed in 17 wells in Wake County, North Carolina, 2020 and 2021 (ver. 1.1, May 2025) Water-level data and results for slug tests performed in 17 wells in Wake County, North Carolina, 2020 and 2021 (ver. 1.1, May 2025)
In accordance with the 50-year planning window used by the North Carolina Division of Water Resources for residents in unincorporated areas of the county, Wake County seeks to better understand the sustainability of groundwater resources of the regolith/fractured-rock aquifer system. Slug tests were performed in 17 wells in the Wake County area, during 2020 and 2021, to provide...
Estimated Use of Water for Coastal Carolinas Focus Area Study Estimated Use of Water for Coastal Carolinas Focus Area Study
The Cape Fear and Pee Dee River Basins in North Carolina and South Carolina were chosen as a focus area study (FAS) for the U.S. Geological Survey (USGS) National Water Census (NWC) in 2016. The objective of the NWC is to place technical information and tools in the hands of stake holders so that they can make decisions on water availability. The USGS South Atlantic Water Science Center...
Data collected for Claiborne aquifer study in southwestern Georgia during 2015 to 2016 Data collected for Claiborne aquifer study in southwestern Georgia during 2015 to 2016
A 72-hour constant-discharge aquifer test was performed at the University of Georgia Stripling Irrigation Research Park, Mitchell County, Georgia, in order to assess the potential of the Claiborne aquifer as a source of water for irrigation supply. At the Stripling site the Claiborne aquifer is 260 feet thick. Between the Claiborne aquifer and the overlying Upper Floridan aquifer is the...
Filter Total Items: 19
Simulation of groundwater flow in Wake County, North Carolina, 2000 through 2070 Simulation of groundwater flow in Wake County, North Carolina, 2000 through 2070
In 2019, the U.S. Geological Survey and Wake County Environmental Services began a collaborative study to evaluate groundwater resources and long-term groundwater availability in the county’s fractured-rock groundwater system. Wake County, in central North Carolina, is experiencing rapid population growth, associated land development, and changing water use. Hydrogeologic data including
Authors
Dominick Antolino, Gerard Gonthier, Georgina Sanchez
Hydrology of the Claiborne aquifer and interconnection with the Upper Floridan aquifer in southwest Georgia Hydrology of the Claiborne aquifer and interconnection with the Upper Floridan aquifer in southwest Georgia
The U.S. Geological Survey conducted a study, in cooperation with the Georgia Environmental Protection Division, to define the hydrologic properties of the Claiborne aquifer and evaluate its connection with the Upper Floridan aquifer in southwest Georgia. The effort involved collecting and compiling hydrologic data from the aquifer in subarea 4 of southwestern Georgia. Data collected for...
Authors
Debbie W. Gordon, Gerard Gonthier
Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer withdrawals on the Upper Floridan aquifer at Barbour Pointe Community, Chatham County, Georgia, 2013 Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer withdrawals on the Upper Floridan aquifer at Barbour Pointe Community, Chatham County, Georgia, 2013
Two test wells were completed at the Barbour Pointe community in western Chatham County, near Savannah, Georgia, in 2013 to investigate the potential of using the Lower Floridan aquifer as a source of municipal water supply. One well was completed in the Lower Floridan aquifer at a depth of 1,080 feet (ft) below land surface; the other well was completed in the Upper Floridan aquifer at...
Authors
Gerard Gonthier, John Clarke
Hydrogeology and water quality of the Dublin and Midville aquifer systems at Waynesboro, Burke County, Georgia, 2011 Hydrogeology and water quality of the Dublin and Midville aquifer systems at Waynesboro, Burke County, Georgia, 2011
The hydrogeology and water quality of the Dublin and Midville aquifer systems were characterized in the City of Waynesboro area in Burke County, Georgia, based on geophysical and drillers’ logs, flowmeter surveys, a 24-houraquifer test, and the collection and chemical analysis of water samples in a newly constructed well. At the test site, the Dublin aquifer system consists of...
Authors
Gerard Gonthier
The water cycle for kids The water cycle for kids
The U.S. Geological Survey (USGS) and the Food and Agriculture Organization of the United Nations (FAO) have created a water-cycle diagram for use in elementary and middle schools. The diagram is available in many languages. This diagram is part of the USGS's Water Science School, in which the water cycle is described in detail.
Authors
Stephanie Neno, Jim Morgan, Gabriele Zonolli, Howard Perlman, Gerard Gonthier
Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer pumping on the Upper Floridan aquifer, Pooler, Chatham County, Georgia, 2011–2012 Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer pumping on the Upper Floridan aquifer, Pooler, Chatham County, Georgia, 2011–2012
Two test wells were completed in Pooler, Georgia, in 2011 to investigate the potential of using the Lower Floridan aquifer as a source of water for municipal use. One well was completed in the Lower Floridan aquifer at a depth of 1,120 feet (ft) below land surface; the other well was completed in the Upper Floridan aquifer at a depth of 486 ft below land surface. At the Pooler test site...
Authors
Gerard Gonthier
Hydrogeologic characteristics and water quality of a confined sand unit in the surficial aquifer system, Hunter Army Airfield, Chatham County, Georgia Hydrogeologic characteristics and water quality of a confined sand unit in the surficial aquifer system, Hunter Army Airfield, Chatham County, Georgia
An 80-foot-deep well (36Q397, U.S. Geological Survey site identification 320146081073701) was constructed at Hunter Army Airfield to assess the potential of using the surficial aquifer system as a water source to irrigate a ballfield complex. A 300-foot-deep test hole was drilled beneath the ballfield complex to characterize the lithology and water-bearing characteristics of sediments...
Authors
Gerard Gonthier
Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia
Two test wells were completed at Fort Stewart, GA, in January and February 2010 to investigate the potential of using the Lower Floridan aquifer as a source of water to satisfy anticipated increases in water use. One well was completed in the Lower Floridan aquifer at a depth of 1,255 feet below land surface; the other well was completed in the Upper Floridan aquifer at a depth of 560...
Authors
Gerard Gonthier
Groundwater conditions and studies in the Augusta–Richmond County area, Georgia, 2008–2009 Groundwater conditions and studies in the Augusta–Richmond County area, Georgia, 2008–2009
Groundwater studies and monitoring efforts conducted during 2008–2009, as part of the U.S. Geological Survey (USGS) Cooperative Water Program with the City of Augusta in Richmond County, Georgia, provided data for the effective management of local water resources. During 2008–2009 the USGS completed: (1) installation of three monitoring wells and the collection of lithologic and...
Authors
Gerard Gonthier, Stephen Lawrence, Michael F. Peck, O. Holloway
Hydrogeology and water quality of the Floridan aquifer system and effects of Lower Floridan aquifer pumping on the Upper Floridan aquifer at Fort Stewart, Georgia Hydrogeology and water quality of the Floridan aquifer system and effects of Lower Floridan aquifer pumping on the Upper Floridan aquifer at Fort Stewart, Georgia
Test drilling, field investigations, and digital modeling were completed at Fort Stewart, GA, during 2009?2010, to assess the geologic, hydraulic, and water-quality characteristics of the Floridan aquifer system and evaluate the effect of Lower Floridan aquifer (LFA) pumping on the Upper Floridan aquifer (UFA). This work was performed pursuant to the Georgia Environmental Protection...
Authors
John Clarke, Gregory Cherry, Gerard Gonthier
A graphical method for estimation of barometric efficiency from continuous data: Concepts and application to a site in the Piedmont, Air Force Plant 6, Marietta, Georgia A graphical method for estimation of barometric efficiency from continuous data: Concepts and application to a site in the Piedmont, Air Force Plant 6, Marietta, Georgia
A graphical method that uses continuous water-level and barometric-pressure data was developed to estimate barometric efficiency. A plot of nearly continuous water level (on the y-axis), as a function of nearly continuous barometric pressure (on the x-axis), will plot as a line curved into a series of connected elliptical loops. Each loop represents a barometric-pressure fluctuation. The...
Authors
Gerard Gonthier
Science and Products
Groundwater Monitoring Program for the Augusta–Richmond County Area, GA
Water supply in the Augusta–Richmond County, GA area is provided in part by three well fields that withdraw water from the Dublin–Midville aquifer system. The U.S. Geological Survey operates a groundwater-level and water-quality monitoring program to support water-management decisions and provide a basis for future groundwater modeling efforts while adding to regional characterization of...
Water-level data and results for slug tests performed in 17 wells in Wake County, North Carolina, 2020 and 2021 (ver. 1.1, May 2025) Water-level data and results for slug tests performed in 17 wells in Wake County, North Carolina, 2020 and 2021 (ver. 1.1, May 2025)
In accordance with the 50-year planning window used by the North Carolina Division of Water Resources for residents in unincorporated areas of the county, Wake County seeks to better understand the sustainability of groundwater resources of the regolith/fractured-rock aquifer system. Slug tests were performed in 17 wells in the Wake County area, during 2020 and 2021, to provide...
Estimated Use of Water for Coastal Carolinas Focus Area Study Estimated Use of Water for Coastal Carolinas Focus Area Study
The Cape Fear and Pee Dee River Basins in North Carolina and South Carolina were chosen as a focus area study (FAS) for the U.S. Geological Survey (USGS) National Water Census (NWC) in 2016. The objective of the NWC is to place technical information and tools in the hands of stake holders so that they can make decisions on water availability. The USGS South Atlantic Water Science Center...
Data collected for Claiborne aquifer study in southwestern Georgia during 2015 to 2016 Data collected for Claiborne aquifer study in southwestern Georgia during 2015 to 2016
A 72-hour constant-discharge aquifer test was performed at the University of Georgia Stripling Irrigation Research Park, Mitchell County, Georgia, in order to assess the potential of the Claiborne aquifer as a source of water for irrigation supply. At the Stripling site the Claiborne aquifer is 260 feet thick. Between the Claiborne aquifer and the overlying Upper Floridan aquifer is the...
Filter Total Items: 19
Simulation of groundwater flow in Wake County, North Carolina, 2000 through 2070 Simulation of groundwater flow in Wake County, North Carolina, 2000 through 2070
In 2019, the U.S. Geological Survey and Wake County Environmental Services began a collaborative study to evaluate groundwater resources and long-term groundwater availability in the county’s fractured-rock groundwater system. Wake County, in central North Carolina, is experiencing rapid population growth, associated land development, and changing water use. Hydrogeologic data including
Authors
Dominick Antolino, Gerard Gonthier, Georgina Sanchez
Hydrology of the Claiborne aquifer and interconnection with the Upper Floridan aquifer in southwest Georgia Hydrology of the Claiborne aquifer and interconnection with the Upper Floridan aquifer in southwest Georgia
The U.S. Geological Survey conducted a study, in cooperation with the Georgia Environmental Protection Division, to define the hydrologic properties of the Claiborne aquifer and evaluate its connection with the Upper Floridan aquifer in southwest Georgia. The effort involved collecting and compiling hydrologic data from the aquifer in subarea 4 of southwestern Georgia. Data collected for...
Authors
Debbie W. Gordon, Gerard Gonthier
Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer withdrawals on the Upper Floridan aquifer at Barbour Pointe Community, Chatham County, Georgia, 2013 Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer withdrawals on the Upper Floridan aquifer at Barbour Pointe Community, Chatham County, Georgia, 2013
Two test wells were completed at the Barbour Pointe community in western Chatham County, near Savannah, Georgia, in 2013 to investigate the potential of using the Lower Floridan aquifer as a source of municipal water supply. One well was completed in the Lower Floridan aquifer at a depth of 1,080 feet (ft) below land surface; the other well was completed in the Upper Floridan aquifer at...
Authors
Gerard Gonthier, John Clarke
Hydrogeology and water quality of the Dublin and Midville aquifer systems at Waynesboro, Burke County, Georgia, 2011 Hydrogeology and water quality of the Dublin and Midville aquifer systems at Waynesboro, Burke County, Georgia, 2011
The hydrogeology and water quality of the Dublin and Midville aquifer systems were characterized in the City of Waynesboro area in Burke County, Georgia, based on geophysical and drillers’ logs, flowmeter surveys, a 24-houraquifer test, and the collection and chemical analysis of water samples in a newly constructed well. At the test site, the Dublin aquifer system consists of...
Authors
Gerard Gonthier
The water cycle for kids The water cycle for kids
The U.S. Geological Survey (USGS) and the Food and Agriculture Organization of the United Nations (FAO) have created a water-cycle diagram for use in elementary and middle schools. The diagram is available in many languages. This diagram is part of the USGS's Water Science School, in which the water cycle is described in detail.
Authors
Stephanie Neno, Jim Morgan, Gabriele Zonolli, Howard Perlman, Gerard Gonthier
Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer pumping on the Upper Floridan aquifer, Pooler, Chatham County, Georgia, 2011–2012 Hydrogeology and water quality of the Floridan aquifer system and effect of Lower Floridan aquifer pumping on the Upper Floridan aquifer, Pooler, Chatham County, Georgia, 2011–2012
Two test wells were completed in Pooler, Georgia, in 2011 to investigate the potential of using the Lower Floridan aquifer as a source of water for municipal use. One well was completed in the Lower Floridan aquifer at a depth of 1,120 feet (ft) below land surface; the other well was completed in the Upper Floridan aquifer at a depth of 486 ft below land surface. At the Pooler test site...
Authors
Gerard Gonthier
Hydrogeologic characteristics and water quality of a confined sand unit in the surficial aquifer system, Hunter Army Airfield, Chatham County, Georgia Hydrogeologic characteristics and water quality of a confined sand unit in the surficial aquifer system, Hunter Army Airfield, Chatham County, Georgia
An 80-foot-deep well (36Q397, U.S. Geological Survey site identification 320146081073701) was constructed at Hunter Army Airfield to assess the potential of using the surficial aquifer system as a water source to irrigate a ballfield complex. A 300-foot-deep test hole was drilled beneath the ballfield complex to characterize the lithology and water-bearing characteristics of sediments...
Authors
Gerard Gonthier
Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia
Two test wells were completed at Fort Stewart, GA, in January and February 2010 to investigate the potential of using the Lower Floridan aquifer as a source of water to satisfy anticipated increases in water use. One well was completed in the Lower Floridan aquifer at a depth of 1,255 feet below land surface; the other well was completed in the Upper Floridan aquifer at a depth of 560...
Authors
Gerard Gonthier
Groundwater conditions and studies in the Augusta–Richmond County area, Georgia, 2008–2009 Groundwater conditions and studies in the Augusta–Richmond County area, Georgia, 2008–2009
Groundwater studies and monitoring efforts conducted during 2008–2009, as part of the U.S. Geological Survey (USGS) Cooperative Water Program with the City of Augusta in Richmond County, Georgia, provided data for the effective management of local water resources. During 2008–2009 the USGS completed: (1) installation of three monitoring wells and the collection of lithologic and...
Authors
Gerard Gonthier, Stephen Lawrence, Michael F. Peck, O. Holloway
Hydrogeology and water quality of the Floridan aquifer system and effects of Lower Floridan aquifer pumping on the Upper Floridan aquifer at Fort Stewart, Georgia Hydrogeology and water quality of the Floridan aquifer system and effects of Lower Floridan aquifer pumping on the Upper Floridan aquifer at Fort Stewart, Georgia
Test drilling, field investigations, and digital modeling were completed at Fort Stewart, GA, during 2009?2010, to assess the geologic, hydraulic, and water-quality characteristics of the Floridan aquifer system and evaluate the effect of Lower Floridan aquifer (LFA) pumping on the Upper Floridan aquifer (UFA). This work was performed pursuant to the Georgia Environmental Protection...
Authors
John Clarke, Gregory Cherry, Gerard Gonthier
A graphical method for estimation of barometric efficiency from continuous data: Concepts and application to a site in the Piedmont, Air Force Plant 6, Marietta, Georgia A graphical method for estimation of barometric efficiency from continuous data: Concepts and application to a site in the Piedmont, Air Force Plant 6, Marietta, Georgia
A graphical method that uses continuous water-level and barometric-pressure data was developed to estimate barometric efficiency. A plot of nearly continuous water level (on the y-axis), as a function of nearly continuous barometric pressure (on the x-axis), will plot as a line curved into a series of connected elliptical loops. Each loop represents a barometric-pressure fluctuation. The...
Authors
Gerard Gonthier