Frederick D. Day-Lewis (Former Employee)
Science and Products
Filter Total Items: 93
Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity
We recorded bulk electrical conductivity (σb) along a soil column during microbially-mediated selenite oxyanion reduction. Effluent fluid electrical conductivity and early time σb were modeled according to classic advective-dispersive transport of the nutrient medium. However, σb along the column exhibited strongly bimodal breakthrough which cannot be explained by changes in the electrical conduct
Authors
L.D. Slater, Frederick D. Day-Lewis, D. Ntarlagiannis, M. O'Brien, N. Yee
Advancing process‐based watershed hydrological research using near‐surface geophysics: A vision for, and review of, electrical and magnetic geophysical methods
We want to develop a dialogue between geophysicists and hydrologists interested in synergistically advancing process based watershed research. We identify recent advances in geophysical instrumentation, and provide a vision for the use of electrical and magnetic geophysical instrumentation in watershed scale hydrology. The focus of the paper is to identify instrumentation that could significantly
Authors
D.A. Robinson, A. Binley, N. Crook, F. D. Day-Lewis, T. P. A Ferre, V. J. S. Grauch, R. Knight, M. Knoll, V. Lakshmi, R. Miller, J. Nyquist, L. Pellerin, K. Singha, L. Slater
Implications of rate-limited mass transfer for aquifer storage and recovery
Pressure to decrease reliance on surface water storage has led to increased interest in aquifer storage and recovery (ASR) systems. Recovery efficiency, which is the ratio of the volume of recovered water that meets a predefined standard to total volume of injected fluid, is a common criterion of ASR viability. Recovery efficiency can be degraded by a number of physical and geochemical processes,
Authors
Sean L. Culkin, Kamini Singha, Frederick D. Day-Lewis
Geoelectrical inference of mass transfer parameters using temporal moments
We present an approach to infer mass transfer parameters based on (1) an analytical model that relates the temporal moments of mobile and bulk concentration and (2) a bicontinuum modification to Archie's law. Whereas conventional geochemical measurements preferentially sample from the mobile domain, electrical resistivity tomography (ERT) is sensitive to bulk electrical conductivity and, thus, ele
Authors
Frederick D. Day-Lewis, Kamini Singha
Electrical characterization of non‐Fickian transport in groundwater and hyporheic systems
Recent work indicates that processes controlling solute mass transfer between mobile and less mobile domains in porous media may be quantified by combining electrical geophysical methods and electrically conductive tracers. Whereas direct geochemical measurements of solute preferentially sample the mobile domain, electrical geophysical methods are sensitive to changes in bulk electrical conductivi
Authors
Kamini Singha, Adam Pidlisecky, Frederick D. Day-Lewis, Michael N. Gooseff
Fiber‐optic distributed temperature sensing: A new tool for assessment and monitoring of hydrologic processes
Fiber‐optic distributed temperature sensing (FO DTS) is an emerging technology for characterizing and monitoring a wide range of important earth processes. FO DTS utilizes laser light to measure temperature along the entire length of standard telecommunications optical fibers. The technology can measure temperature every meter over FO cables up to 30 kilometers (km) long. Commercially available sy
Authors
John W. Lane, Frederick D. Day-Lewis, Carole D. Johnson, Cian B. Dawson, David L. Nelms, Cheryl A. Eddy-Miller, Jerrod D. Wheeler, Charles F. Harvey, Hanan N. Karam
Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana
The utility of the multi‐channel analysis of surface waves (MASW) seismic method for non‐invasive assessment of earthen levees was evaluated for a section of the Citrus Lakefront Levee, New Orleans, Louisiana. This test was conducted after the New Orleans' area levee system had been stressed by Hurricane Katrina in 2005. The MASW data were acquired in a seismically noisy, urban environment using a
Authors
John W. Lane, Julian M. Ivanov, Frederick D. Day-Lewis, Drew Clemens, Robert Patev, Richard D. Miller
Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity
Submarine ground‐water discharge (SGD) contributes important solute fluxes to coastal waters. Pollutants are transported to coastal ecosystems by SGD at spatially and temporally variable rates. New approaches are needed to characterize the effects of storm‐event, tidal, and seasonal forcing on SGD. Here, we evaluate the utility of two geophysical methods‐fiber‐optic distributed temperature sensing
Authors
Rory Henderson, Frederick D. Day-Lewis, John W. Lane, Charles F. Harvey, Lanbo Liu
Moment inference from tomograms
Time-lapse geophysical tomography can provide valuable qualitative insights into hydrologic transport phenomena associated with aquifer dynamics, tracer experiments, and engineered remediation. Increasingly, tomograms are used to infer the spatial and/or temporal moments of solute plumes; these moments provide quantitative information about transport processes (e.g., advection, dispersion, and rat
Authors
Frederick D. Day-Lewis, Yongping Chen, Kamini Singha
Accounting for tomographic resolution in estimating hydrologic properties from geophysical data
No abstract available.
Authors
K. Singha, Frederick D. Day-Lewis, S. Moysey
Integrating hydrologic and geophysical data to constrain coastal surficial aquifer processes at multiple spatial and temporal scales
Since 1997, repeated, coincident geophysical surveys and extensive hydrologic studies in shallow monitoring wells have been used to study static and dynamic processes associated with surface water-groundwater interaction at a range of spatial scales at the estuarine and ocean boundaries of an undeveloped, permeable barrier island in the Georgia part of the U.S. South Atlantic Bight. Because geophy
Authors
Gregory M. Schultz, Carolyn Ruppel, Patrick Fulton
Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire
This chapter contains sections titled:IntroductionMirror Lake SiteFractures and Geologic MappingHydraulic Properties of Fractured Rock From Meters to KilometersChemical Migration in Fractured RockFracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake SiteSummary
Authors
Allen M. Shapiro, Paul A. Hsieh, William C. Burton, Gregory J. Walsh
Science and Products
Filter Total Items: 93
Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity
We recorded bulk electrical conductivity (σb) along a soil column during microbially-mediated selenite oxyanion reduction. Effluent fluid electrical conductivity and early time σb were modeled according to classic advective-dispersive transport of the nutrient medium. However, σb along the column exhibited strongly bimodal breakthrough which cannot be explained by changes in the electrical conduct
Authors
L.D. Slater, Frederick D. Day-Lewis, D. Ntarlagiannis, M. O'Brien, N. Yee
Advancing process‐based watershed hydrological research using near‐surface geophysics: A vision for, and review of, electrical and magnetic geophysical methods
We want to develop a dialogue between geophysicists and hydrologists interested in synergistically advancing process based watershed research. We identify recent advances in geophysical instrumentation, and provide a vision for the use of electrical and magnetic geophysical instrumentation in watershed scale hydrology. The focus of the paper is to identify instrumentation that could significantly
Authors
D.A. Robinson, A. Binley, N. Crook, F. D. Day-Lewis, T. P. A Ferre, V. J. S. Grauch, R. Knight, M. Knoll, V. Lakshmi, R. Miller, J. Nyquist, L. Pellerin, K. Singha, L. Slater
Implications of rate-limited mass transfer for aquifer storage and recovery
Pressure to decrease reliance on surface water storage has led to increased interest in aquifer storage and recovery (ASR) systems. Recovery efficiency, which is the ratio of the volume of recovered water that meets a predefined standard to total volume of injected fluid, is a common criterion of ASR viability. Recovery efficiency can be degraded by a number of physical and geochemical processes,
Authors
Sean L. Culkin, Kamini Singha, Frederick D. Day-Lewis
Geoelectrical inference of mass transfer parameters using temporal moments
We present an approach to infer mass transfer parameters based on (1) an analytical model that relates the temporal moments of mobile and bulk concentration and (2) a bicontinuum modification to Archie's law. Whereas conventional geochemical measurements preferentially sample from the mobile domain, electrical resistivity tomography (ERT) is sensitive to bulk electrical conductivity and, thus, ele
Authors
Frederick D. Day-Lewis, Kamini Singha
Electrical characterization of non‐Fickian transport in groundwater and hyporheic systems
Recent work indicates that processes controlling solute mass transfer between mobile and less mobile domains in porous media may be quantified by combining electrical geophysical methods and electrically conductive tracers. Whereas direct geochemical measurements of solute preferentially sample the mobile domain, electrical geophysical methods are sensitive to changes in bulk electrical conductivi
Authors
Kamini Singha, Adam Pidlisecky, Frederick D. Day-Lewis, Michael N. Gooseff
Fiber‐optic distributed temperature sensing: A new tool for assessment and monitoring of hydrologic processes
Fiber‐optic distributed temperature sensing (FO DTS) is an emerging technology for characterizing and monitoring a wide range of important earth processes. FO DTS utilizes laser light to measure temperature along the entire length of standard telecommunications optical fibers. The technology can measure temperature every meter over FO cables up to 30 kilometers (km) long. Commercially available sy
Authors
John W. Lane, Frederick D. Day-Lewis, Carole D. Johnson, Cian B. Dawson, David L. Nelms, Cheryl A. Eddy-Miller, Jerrod D. Wheeler, Charles F. Harvey, Hanan N. Karam
Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana
The utility of the multi‐channel analysis of surface waves (MASW) seismic method for non‐invasive assessment of earthen levees was evaluated for a section of the Citrus Lakefront Levee, New Orleans, Louisiana. This test was conducted after the New Orleans' area levee system had been stressed by Hurricane Katrina in 2005. The MASW data were acquired in a seismically noisy, urban environment using a
Authors
John W. Lane, Julian M. Ivanov, Frederick D. Day-Lewis, Drew Clemens, Robert Patev, Richard D. Miller
Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity
Submarine ground‐water discharge (SGD) contributes important solute fluxes to coastal waters. Pollutants are transported to coastal ecosystems by SGD at spatially and temporally variable rates. New approaches are needed to characterize the effects of storm‐event, tidal, and seasonal forcing on SGD. Here, we evaluate the utility of two geophysical methods‐fiber‐optic distributed temperature sensing
Authors
Rory Henderson, Frederick D. Day-Lewis, John W. Lane, Charles F. Harvey, Lanbo Liu
Moment inference from tomograms
Time-lapse geophysical tomography can provide valuable qualitative insights into hydrologic transport phenomena associated with aquifer dynamics, tracer experiments, and engineered remediation. Increasingly, tomograms are used to infer the spatial and/or temporal moments of solute plumes; these moments provide quantitative information about transport processes (e.g., advection, dispersion, and rat
Authors
Frederick D. Day-Lewis, Yongping Chen, Kamini Singha
Accounting for tomographic resolution in estimating hydrologic properties from geophysical data
No abstract available.
Authors
K. Singha, Frederick D. Day-Lewis, S. Moysey
Integrating hydrologic and geophysical data to constrain coastal surficial aquifer processes at multiple spatial and temporal scales
Since 1997, repeated, coincident geophysical surveys and extensive hydrologic studies in shallow monitoring wells have been used to study static and dynamic processes associated with surface water-groundwater interaction at a range of spatial scales at the estuarine and ocean boundaries of an undeveloped, permeable barrier island in the Georgia part of the U.S. South Atlantic Bight. Because geophy
Authors
Gregory M. Schultz, Carolyn Ruppel, Patrick Fulton
Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire
This chapter contains sections titled:IntroductionMirror Lake SiteFractures and Geologic MappingHydraulic Properties of Fractured Rock From Meters to KilometersChemical Migration in Fractured RockFracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake SiteSummary
Authors
Allen M. Shapiro, Paul A. Hsieh, William C. Burton, Gregory J. Walsh