Joseph Hughes (Former Employee)
Science and Products
Filter Total Items: 45
Use of time series and harmonic constituents of tidal propagation to enhance estimation of coastal aquifer heterogeneity Use of time series and harmonic constituents of tidal propagation to enhance estimation of coastal aquifer heterogeneity
A synthetic two‐dimensional model of a horizontally and vertically heterogeneous confined coastal aquifer system, based on the Upper Floridan aquifer in south Florida, USA, subjected to constant recharge and a complex tidal signal was used to generate 15‐minute water‐level data at select locations over a 7‐day simulation period. “Observed” water‐level data were generated by adding noise
Authors
Joseph D. Hughes, Jeremy T. White, Christian D. Langevin
Effect of numerical dispersion as a source of structural noise in the calibration of a highly parameterized saltwater intrusion model Effect of numerical dispersion as a source of structural noise in the calibration of a highly parameterized saltwater intrusion model
A model with a small amount of numerical dispersion was used to represent saltwater 7 intrusion in a homogeneous aquifer for a 10-year historical calibration period with one 8 groundwater withdrawal location followed by a 10-year prediction period with two groundwater 9 withdrawal locations. Time-varying groundwater concentrations at arbitrary locations in this low-10 dispersion model...
Authors
Christian D. Langevin, Joseph D. Hughes
Effect of sea-level rise on future coastal groundwater resources in southern Florida, USA Effect of sea-level rise on future coastal groundwater resources in southern Florida, USA
An existing variable‐density groundwater flow and solute transport model, developed for the northern part of Broward County, Florida, was used to predict the effect of sealevel rise on future coastal groundwater resources. Using average annual conditions from 2005, simulations were performed for 100 years into the future using four different rates of sea‐level rise: 0, 24, 48, and 88...
Authors
Christian D. Langevin, Michael R. Zygnerski, Jeremy T. White, Joseph D. Hughes
Effect of hypersaline cooling canals on aquifer salinization Effect of hypersaline cooling canals on aquifer salinization
The combined effect of salinity and temperature on density-driven convection was evaluated in this study for a large (28 km2) cooling canal system (CCS) at a thermoelectric power plant in south Florida, USA. A two-dimensional cross-section model was used to evaluate the effects of hydraulic heterogeneities, cooling canal salinity, heat transport, and cooling canal geometry on aquifer...
Authors
Joseph D. Hughes, Christian D. Langevin, Linzy Brakefield-Goswami
Temporal response of hydraulic head, temperature, and chloride concentrations to sea-level changes, Floridan aquifer system, USA Temporal response of hydraulic head, temperature, and chloride concentrations to sea-level changes, Floridan aquifer system, USA
Three-dimensional density-dependent flow and transport modeling of the Floridan aquifer system, USA shows that current chloride concentrations are not in equilibrium with current sea level and, second, that the geometric configuration of the aquifer has a significant effect on system responses. The modeling shows that hydraulic head equilibrates first, followed by temperatures, and then...
Authors
J.D. Hughes, H. Leonard Vacher, W. E. Sanford
MIKE SHE: Software for integrated surface water/ground water modeling MIKE SHE: Software for integrated surface water/ground water modeling
No abstract available.
Authors
Joseph D. Hughes, Jie Liu
Non-USGS Publications**
Nyer, E., Mayfield, P., and Hughes, J.D, 1998. Beyond the AFCEE Protocol for Natural Attenuation: Ground Water Monitoring and Remediation, v. 18, no. 3, 70-77.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 45
Use of time series and harmonic constituents of tidal propagation to enhance estimation of coastal aquifer heterogeneity Use of time series and harmonic constituents of tidal propagation to enhance estimation of coastal aquifer heterogeneity
A synthetic two‐dimensional model of a horizontally and vertically heterogeneous confined coastal aquifer system, based on the Upper Floridan aquifer in south Florida, USA, subjected to constant recharge and a complex tidal signal was used to generate 15‐minute water‐level data at select locations over a 7‐day simulation period. “Observed” water‐level data were generated by adding noise
Authors
Joseph D. Hughes, Jeremy T. White, Christian D. Langevin
Effect of numerical dispersion as a source of structural noise in the calibration of a highly parameterized saltwater intrusion model Effect of numerical dispersion as a source of structural noise in the calibration of a highly parameterized saltwater intrusion model
A model with a small amount of numerical dispersion was used to represent saltwater 7 intrusion in a homogeneous aquifer for a 10-year historical calibration period with one 8 groundwater withdrawal location followed by a 10-year prediction period with two groundwater 9 withdrawal locations. Time-varying groundwater concentrations at arbitrary locations in this low-10 dispersion model...
Authors
Christian D. Langevin, Joseph D. Hughes
Effect of sea-level rise on future coastal groundwater resources in southern Florida, USA Effect of sea-level rise on future coastal groundwater resources in southern Florida, USA
An existing variable‐density groundwater flow and solute transport model, developed for the northern part of Broward County, Florida, was used to predict the effect of sealevel rise on future coastal groundwater resources. Using average annual conditions from 2005, simulations were performed for 100 years into the future using four different rates of sea‐level rise: 0, 24, 48, and 88...
Authors
Christian D. Langevin, Michael R. Zygnerski, Jeremy T. White, Joseph D. Hughes
Effect of hypersaline cooling canals on aquifer salinization Effect of hypersaline cooling canals on aquifer salinization
The combined effect of salinity and temperature on density-driven convection was evaluated in this study for a large (28 km2) cooling canal system (CCS) at a thermoelectric power plant in south Florida, USA. A two-dimensional cross-section model was used to evaluate the effects of hydraulic heterogeneities, cooling canal salinity, heat transport, and cooling canal geometry on aquifer...
Authors
Joseph D. Hughes, Christian D. Langevin, Linzy Brakefield-Goswami
Temporal response of hydraulic head, temperature, and chloride concentrations to sea-level changes, Floridan aquifer system, USA Temporal response of hydraulic head, temperature, and chloride concentrations to sea-level changes, Floridan aquifer system, USA
Three-dimensional density-dependent flow and transport modeling of the Floridan aquifer system, USA shows that current chloride concentrations are not in equilibrium with current sea level and, second, that the geometric configuration of the aquifer has a significant effect on system responses. The modeling shows that hydraulic head equilibrates first, followed by temperatures, and then...
Authors
J.D. Hughes, H. Leonard Vacher, W. E. Sanford
MIKE SHE: Software for integrated surface water/ground water modeling MIKE SHE: Software for integrated surface water/ground water modeling
No abstract available.
Authors
Joseph D. Hughes, Jie Liu
Non-USGS Publications**
Nyer, E., Mayfield, P., and Hughes, J.D, 1998. Beyond the AFCEE Protocol for Natural Attenuation: Ground Water Monitoring and Remediation, v. 18, no. 3, 70-77.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.