Frederick D. Day-Lewis (Former Employee)
Science and Products
Filter Total Items: 13
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Filter Total Items: 94
Advances in interpretation of subsurface processes with time-lapse electrical imaging Advances in interpretation of subsurface processes with time-lapse electrical imaging
Electrical geophysical methods, including electrical resistivity, time-domain induced polarization, and complex resistivity, have become commonly used to image the near subsurface. Here, we outline their utility for time-lapse imaging of hydrological, geochemical, and biogeochemical processes, focusing on new instrumentation, processing, and analysis techniques specific to monitoring. We...
Authors
Kaminit Singha, Frederick Day-Lewis, Tim Johnson, Lee D. Slater
Development of a new semi-analytical model for cross-borehole flow experiments in fractured media Development of a new semi-analytical model for cross-borehole flow experiments in fractured media
Analysis of borehole flow logs is a valuable technique for identifying the presence of fractures in the subsurface and estimating properties such as fracture connectivity, transmissivity and storativity. However, such estimation requires the development of analytical and/or numerical modeling tools that are well adapted to the complexity of the problem. In this paper, we present a new...
Authors
Delphine Roubinet, James Irving, Frederick Day-Lewis
Anomalous solute transport in saturated porous media: Relating transport model parameters to electrical and nuclear magnetic resonance properties Anomalous solute transport in saturated porous media: Relating transport model parameters to electrical and nuclear magnetic resonance properties
The advection-dispersion equation (ADE) fails to describe commonly observed non-Fickian solute transport in saturated porous media, necessitating the use of other models such as the dual-domain mass-transfer (DDMT) model. DDMT model parameters are commonly calibrated via curve fitting, providing little insight into the relation between effective parameters and physical properties of the...
Authors
Ryan D Swanson, Andrew Binley, Kristina Keating, Samantha France, Gordon Osterman, Frederick Day-Lewis, Kamini Singha
Dual-domain mass-transfer parameters from electrical hysteresis: Theory and analytical approach applied to laboratory, synthetic streambed, and groundwater experiments Dual-domain mass-transfer parameters from electrical hysteresis: Theory and analytical approach applied to laboratory, synthetic streambed, and groundwater experiments
Models of dual‐domain mass transfer (DDMT) are used to explain anomalous aquifer transport behavior such as the slow release of contamination and solute tracer tailing. Traditional tracer experiments to characterize DDMT are performed at the flow path scale (meters), which inherently incorporates heterogeneous exchange processes; hence, estimated “effective” parameters are sensitive to
Authors
Martin Briggs, Frederick Day-Lewis, John Ong, Judson Harvey, John Lane
1DTempPro: analyzing temperature profiles for groundwater/surface-water exchange 1DTempPro: analyzing temperature profiles for groundwater/surface-water exchange
A new computer program, 1DTempPro, is presented for the analysis of vertical one-dimensional (1D) temperature profiles under saturated flow conditions. 1DTempPro is a graphical user interface to the U.S. Geological Survey code Variably Saturated 2-Dimensional Heat Transport (VS2DH), which numerically solves the flow and heat-transport equations. Pre- and postprocessor features allow the...
Authors
Emily Voytek, Anja Drenkelfuss, Frederick Day-Lewis, Richard Healy, John Lane, Dale Werkema
New permafrost is forming around shrinking Arctic lakes, but will it last? New permafrost is forming around shrinking Arctic lakes, but will it last?
Widespread lake shrinkage in cold regions has been linked to climate warming and permafrost thaw. Permafrost aggradation, however, has been observed within the margins of recently receded lakes, in seeming contradiction of climate warming. Here permafrost aggradation dynamics are examined at Twelvemile Lake, a retreating lake in interior Alaska. Observations reveal patches of recently...
Authors
Martin A. Briggs, Michelle Walvoord, Jeffrey McKenzie, Clifford Voss, Frederick Day-Lewis, John Lane
Quantity and quality of groundwater discharge in a hypersaline lake environment Quantity and quality of groundwater discharge in a hypersaline lake environment
Geophysical and geochemical surveys were conducted to understand groundwater discharge to Great Salt Lake (GSL) and assess the potential significance of groundwater discharge as a source of selenium (Se). Continuous resistivity profiling (CRP) focusing below the sediment/water interface and fiber-optic distributed temperature sensing (FO-DTS) surveys were conducted along the south shore...
Authors
R.B. Anderson, D. Naftz, F. D. Day-Lewis, R.D. Henderson, D.O. Rosenberry, Bernard J. Stolp, P. Jewell
Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River
Groundwater discharge locations along the upper Delaware River, both discrete bank seeps and diffuse streambed upwelling, may create thermal niche environments that benefit the endangered dwarf wedgemussel (Alasmidonta heterodon). We seek to identify whether discrete or diffuse groundwater inflow is the dominant control on refugia. Numerous springs and seeps were identified at all...
Authors
Martin A. Briggs, Emily Voytek, Frederick Day-Lewis, Donald Rosenberry, John Lane
Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing
Fiber-optic distributed temperature sensing (FO-DTS) increasingly is used to map zones of focused groundwater/surface-water exchange (GWSWE). Previous studies of GWSWE using FO-DTS involved identification of zones of focused GWSWE based on arbitrary cutoffs of FO-DTS time-series statistics (e.g., variance, cross-correlation between temperature and stage, or spectral power). New...
Authors
Kisa Mwakanyamale, Frederick Day-Lewis, Lee Slater
Simultaneous estimation of local-scale and flow path-scale dual-domain mass transfer parameters using geoelectrical monitoring Simultaneous estimation of local-scale and flow path-scale dual-domain mass transfer parameters using geoelectrical monitoring
Anomalous solute transport, modeled as rate-limited mass transfer, has an observable geoelectrical signature that can be exploited to infer the controlling parameters. Previous experiments indicate the combination of time-lapse geoelectrical and fluid conductivity measurements collected during ionic tracer experiments provides valuable insight into the exchange of solute between mobile...
Authors
Martin A. Briggs, Frederick Day-Lewis, John Ong, Gary Curtis, John Lane
Direct geoelectrical evidence of mass transfer at the laboratory scale Direct geoelectrical evidence of mass transfer at the laboratory scale
Previous field-scale experimental data and numerical modeling suggest that the dual-domain mass transfer (DDMT) of electrolytic tracers has an observable geoelectrical signature. Here we present controlled laboratory experiments confirming the electrical signature of DDMT and demonstrate the use of time-lapse electrical measurements in conjunction with concentration measurements to...
Authors
Ryan Swanson, Kamini Singha, Frederick Day-Lewis, Andrew Binley, Kristina Keating, Roy Haggerty
Monitoring groundwater-surface water interaction using time-series and time-frequency analysis of transient three-dimensional electrical resistivity changes Monitoring groundwater-surface water interaction using time-series and time-frequency analysis of transient three-dimensional electrical resistivity changes
Time-lapse resistivity imaging is increasingly used to monitor hydrologic processes. Compared to conventional hydrologic measurements, surface time-lapse resistivity provides superior spatial coverage in two or three dimensions, potentially high-resolution information in time, and information in the absence of wells. However, interpretation of time-lapse electrical tomograms is...
Authors
Timothy C. Johnson, Lee Slater, Dimitris Ntarlagiannis, Frederick Day-Lewis, Mehrez Elwaseif
Science and Products
Filter Total Items: 13
No Result Found
Filter Total Items: 94
Advances in interpretation of subsurface processes with time-lapse electrical imaging Advances in interpretation of subsurface processes with time-lapse electrical imaging
Electrical geophysical methods, including electrical resistivity, time-domain induced polarization, and complex resistivity, have become commonly used to image the near subsurface. Here, we outline their utility for time-lapse imaging of hydrological, geochemical, and biogeochemical processes, focusing on new instrumentation, processing, and analysis techniques specific to monitoring. We...
Authors
Kaminit Singha, Frederick Day-Lewis, Tim Johnson, Lee D. Slater
Development of a new semi-analytical model for cross-borehole flow experiments in fractured media Development of a new semi-analytical model for cross-borehole flow experiments in fractured media
Analysis of borehole flow logs is a valuable technique for identifying the presence of fractures in the subsurface and estimating properties such as fracture connectivity, transmissivity and storativity. However, such estimation requires the development of analytical and/or numerical modeling tools that are well adapted to the complexity of the problem. In this paper, we present a new...
Authors
Delphine Roubinet, James Irving, Frederick Day-Lewis
Anomalous solute transport in saturated porous media: Relating transport model parameters to electrical and nuclear magnetic resonance properties Anomalous solute transport in saturated porous media: Relating transport model parameters to electrical and nuclear magnetic resonance properties
The advection-dispersion equation (ADE) fails to describe commonly observed non-Fickian solute transport in saturated porous media, necessitating the use of other models such as the dual-domain mass-transfer (DDMT) model. DDMT model parameters are commonly calibrated via curve fitting, providing little insight into the relation between effective parameters and physical properties of the...
Authors
Ryan D Swanson, Andrew Binley, Kristina Keating, Samantha France, Gordon Osterman, Frederick Day-Lewis, Kamini Singha
Dual-domain mass-transfer parameters from electrical hysteresis: Theory and analytical approach applied to laboratory, synthetic streambed, and groundwater experiments Dual-domain mass-transfer parameters from electrical hysteresis: Theory and analytical approach applied to laboratory, synthetic streambed, and groundwater experiments
Models of dual‐domain mass transfer (DDMT) are used to explain anomalous aquifer transport behavior such as the slow release of contamination and solute tracer tailing. Traditional tracer experiments to characterize DDMT are performed at the flow path scale (meters), which inherently incorporates heterogeneous exchange processes; hence, estimated “effective” parameters are sensitive to
Authors
Martin Briggs, Frederick Day-Lewis, John Ong, Judson Harvey, John Lane
1DTempPro: analyzing temperature profiles for groundwater/surface-water exchange 1DTempPro: analyzing temperature profiles for groundwater/surface-water exchange
A new computer program, 1DTempPro, is presented for the analysis of vertical one-dimensional (1D) temperature profiles under saturated flow conditions. 1DTempPro is a graphical user interface to the U.S. Geological Survey code Variably Saturated 2-Dimensional Heat Transport (VS2DH), which numerically solves the flow and heat-transport equations. Pre- and postprocessor features allow the...
Authors
Emily Voytek, Anja Drenkelfuss, Frederick Day-Lewis, Richard Healy, John Lane, Dale Werkema
New permafrost is forming around shrinking Arctic lakes, but will it last? New permafrost is forming around shrinking Arctic lakes, but will it last?
Widespread lake shrinkage in cold regions has been linked to climate warming and permafrost thaw. Permafrost aggradation, however, has been observed within the margins of recently receded lakes, in seeming contradiction of climate warming. Here permafrost aggradation dynamics are examined at Twelvemile Lake, a retreating lake in interior Alaska. Observations reveal patches of recently...
Authors
Martin A. Briggs, Michelle Walvoord, Jeffrey McKenzie, Clifford Voss, Frederick Day-Lewis, John Lane
Quantity and quality of groundwater discharge in a hypersaline lake environment Quantity and quality of groundwater discharge in a hypersaline lake environment
Geophysical and geochemical surveys were conducted to understand groundwater discharge to Great Salt Lake (GSL) and assess the potential significance of groundwater discharge as a source of selenium (Se). Continuous resistivity profiling (CRP) focusing below the sediment/water interface and fiber-optic distributed temperature sensing (FO-DTS) surveys were conducted along the south shore...
Authors
R.B. Anderson, D. Naftz, F. D. Day-Lewis, R.D. Henderson, D.O. Rosenberry, Bernard J. Stolp, P. Jewell
Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River
Groundwater discharge locations along the upper Delaware River, both discrete bank seeps and diffuse streambed upwelling, may create thermal niche environments that benefit the endangered dwarf wedgemussel (Alasmidonta heterodon). We seek to identify whether discrete or diffuse groundwater inflow is the dominant control on refugia. Numerous springs and seeps were identified at all...
Authors
Martin A. Briggs, Emily Voytek, Frederick Day-Lewis, Donald Rosenberry, John Lane
Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing
Fiber-optic distributed temperature sensing (FO-DTS) increasingly is used to map zones of focused groundwater/surface-water exchange (GWSWE). Previous studies of GWSWE using FO-DTS involved identification of zones of focused GWSWE based on arbitrary cutoffs of FO-DTS time-series statistics (e.g., variance, cross-correlation between temperature and stage, or spectral power). New...
Authors
Kisa Mwakanyamale, Frederick Day-Lewis, Lee Slater
Simultaneous estimation of local-scale and flow path-scale dual-domain mass transfer parameters using geoelectrical monitoring Simultaneous estimation of local-scale and flow path-scale dual-domain mass transfer parameters using geoelectrical monitoring
Anomalous solute transport, modeled as rate-limited mass transfer, has an observable geoelectrical signature that can be exploited to infer the controlling parameters. Previous experiments indicate the combination of time-lapse geoelectrical and fluid conductivity measurements collected during ionic tracer experiments provides valuable insight into the exchange of solute between mobile...
Authors
Martin A. Briggs, Frederick Day-Lewis, John Ong, Gary Curtis, John Lane
Direct geoelectrical evidence of mass transfer at the laboratory scale Direct geoelectrical evidence of mass transfer at the laboratory scale
Previous field-scale experimental data and numerical modeling suggest that the dual-domain mass transfer (DDMT) of electrolytic tracers has an observable geoelectrical signature. Here we present controlled laboratory experiments confirming the electrical signature of DDMT and demonstrate the use of time-lapse electrical measurements in conjunction with concentration measurements to...
Authors
Ryan Swanson, Kamini Singha, Frederick Day-Lewis, Andrew Binley, Kristina Keating, Roy Haggerty
Monitoring groundwater-surface water interaction using time-series and time-frequency analysis of transient three-dimensional electrical resistivity changes Monitoring groundwater-surface water interaction using time-series and time-frequency analysis of transient three-dimensional electrical resistivity changes
Time-lapse resistivity imaging is increasingly used to monitor hydrologic processes. Compared to conventional hydrologic measurements, surface time-lapse resistivity provides superior spatial coverage in two or three dimensions, potentially high-resolution information in time, and information in the absence of wells. However, interpretation of time-lapse electrical tomograms is...
Authors
Timothy C. Johnson, Lee Slater, Dimitris Ntarlagiannis, Frederick Day-Lewis, Mehrez Elwaseif