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Frederick D. Day-Lewis (Former Employee)

Science and Products

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Instrumentation set up in a valley near a mountain.

Hydrogeophysics Core Technology Team

About the Research. The Hydrogeophysics Core Technology Team (CTT) as part of the Environmental Health Program specializes in locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure and mapping hydrologic connectivity across varied landscapes.
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology
link

Hydrogeophysics Core Technology Team

About the Research. The Hydrogeophysics Core Technology Team (CTT) as part of the Environmental Health Program specializes in locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure and mapping hydrologic connectivity across varied landscapes.
Learn More
link
Charles Harvey (MIT) and Fred Day-Lewis (USGS) prepare fiber-optic distributed temperature system

Fiber-Optic Distributed Temperature Sensing Technology for Surface-Water and Groundwater Studies

Fiber-optic distributed temperature sensing (FO-DTS) technology can be used for characterizing estuary-aquifer and stream-aquifer interaction and for identifying transmissive fractures in bedrock boreholes.
By
Water Resources Mission Area
link

Fiber-Optic Distributed Temperature Sensing Technology for Surface-Water and Groundwater Studies

Fiber-optic distributed temperature sensing (FO-DTS) technology can be used for characterizing estuary-aquifer and stream-aquifer interaction and for identifying transmissive fractures in bedrock boreholes.
Learn More
link
thermal infrared image indicating groundwater discharging into surface water and mixing

Geophysics for USGS Groundwater/Surface Water Exchange Studies

Locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure, is essential to water-resource managers and hydrologists for the development of effective water-resource policy, protection, and management. The USGS conducts applied research to evaluate the use of new or emerging hydrogeophysical tools and methods to improve our understanding of...
By
Water Resources Mission Area
link

Geophysics for USGS Groundwater/Surface Water Exchange Studies

Locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure, is essential to water-resource managers and hydrologists for the development of effective water-resource policy, protection, and management. The USGS conducts applied research to evaluate the use of new or emerging hydrogeophysical tools and methods to improve our understanding of...
Learn More
link
Fred Day-Lewis prepares the on-site field office, where real-time geophysical data record real-time geophysical data

Optimized Enhanced Bioremediation through 4D Geophysical Monitoring and Autonomous Data Collection, Processing, and Analysis

The USGS Office of Ground Water, Branch of Geophysics (OGW BG) is collaborating on an applied research project to evaluate the use of new hydrogeophysical tools to remotely monitor and visualize subsurface bioremediation amendment emplacement and transport in near real-time. The project, funded by the U.S. Department of Defense Environmental Security Technology Certification Program, could provide...
By
Water Resources Mission Area
link

Optimized Enhanced Bioremediation through 4D Geophysical Monitoring and Autonomous Data Collection, Processing, and Analysis

The USGS Office of Ground Water, Branch of Geophysics (OGW BG) is collaborating on an applied research project to evaluate the use of new hydrogeophysical tools to remotely monitor and visualize subsurface bioremediation amendment emplacement and transport in near real-time. The project, funded by the U.S. Department of Defense Environmental Security Technology Certification Program, could provide...
Learn More
link
Hannan Karam (MIT) connects the distributed temperature sensor to a laptop computer. This allows temp data to be monitored

Fiber-Optic Distributed Temperature Sensing in Waquoit Bay, Massachusetts

In 2006 the USGS Office of Groundwater, Branch of Geophysics (OGW BG) conducted a technology demonstration and evaluation project in Waquoit Bay, East Falmouth, Massachusetts, to evaluate the use of fiber-optic distributed temperature sensing (FO-DTS). In this project, the USGS used FO-DTS to investigate aquifer-estuary interaction by monitoring submarine groundwater discharge in Waquoit Bay. OGW...
By
Water Resources Mission Area
link

Fiber-Optic Distributed Temperature Sensing in Waquoit Bay, Massachusetts

In 2006 the USGS Office of Groundwater, Branch of Geophysics (OGW BG) conducted a technology demonstration and evaluation project in Waquoit Bay, East Falmouth, Massachusetts, to evaluate the use of fiber-optic distributed temperature sensing (FO-DTS). In this project, the USGS used FO-DTS to investigate aquifer-estuary interaction by monitoring submarine groundwater discharge in Waquoit Bay. OGW...
Learn More

Data release for tempest1d: Recursive Estimation of Vertical Groundwater/Surface-Water Exchange using Heat Tracing

This data release provides a recursive-estimation framework to infer groundwater/surface-water exchange based on temperature time series collected at different vertical depths below the sediment/water interface. A heat-transport problem was formulated as a state-space model (SSM), in which the spatial derivatives in the convection/conduction equation are approximated using finite differences. The
By
Water Resources Mission Area

Selected borehole geophysical logs from three contaminant sites in California, Wisconsin, and New Jersey

Borehole geophysical logs were collected to characterize bedrock aquifers at three contamination sites located in California, Wisconsin, and New Jersey. The data were collected by the U.S. Geological Survey (USGS) and the University of Guelph from 2014 to 2015 as part of the U.S. Department of Defense Strategic Environmental Research and Development Program (SERDP) and Environmental Security Techn
By
Water Resources Mission Area

Algorithms for model parameter estimation, state estimation, and forecasting applied to a State-Space model coupled with the Kalman Filter for one-dimensional vertical infiltration to fractured rock aquifers

The algorithms and input data included in this data release are used to interpret time-series data (water- table altitude, precipitation, and potential evapotranspiration) over an observation period to estimate model parameters of a State-Space (SS) model of vertical infiltration to a fractured-rock aquifer. The SS model is coupled with a Kalman Filter (KF) to estimate system states (water-table a

Hydrogeochemical data for the characterization of stream, groundwater, and beaver-induced floodplain exchange in the East River Science Focus Area, Crested Butte, CO

The U.S. Geological Survey, along with scientists from Rutgers University, collected water chemistry, electromagnetic, redox-potential, dissolved oxygen, water flow rate, and water temperature data along stream and river corridors in multiple sub-watersheds of the East River Science Focus Area (SFA) near Crested Butte, CO. The concept of 'river corridor' science recognizes that the quality of flow
By
Water Resources Mission Area

Geophysical data from the unnamed lake at the National Crude Oil Spill Fate and Natural Attenuation Research Site, Bemidji, MN (ver. 3.0, May 2022)

The National Crude Oil Spill Fate and Natural Attenuation Research Site is located near Bemidji, MN, USA. A high-pressure oil pipeline ruptured in 1979 releasing ~1.7 million liters of light crude oil, which sprayed over an area of ~6500 square meters and collected in topographic depressions. Approximately 75% of the spilled oil was recovered. Much of the remainder reached the water table, where i
By
Water Resources Mission Area

Electrical geophysical data collected in the shallow sediments of Snake Pond, Cape Cod, USA

Quantification of mobile/less-mobile porosity dynamics at the sediment/water interface is critical to predicting contaminant storage, release, and transformation processes. Zones in groundwater flow-through lakes where lake water recharges the aquifer can strongly control aquifer water quality. Less-mobile porosity has previously been characterized in aquifers using flow path scale (10's of m+) tr
By
Water Resources Mission Area, Contaminant Biology, Environmental Health Program, Groundwater and Streamflow Information Program, Toxic Substances Hydrology

Temperature and seepage data from a lake-bottom permeable reactive barrier, Ashumet Pond, Falmouth, MA, 2004-2015.

These data were collected to evaluate groundwater/surface-water exchange in the area of a lake-bottom permeable reactive barrier and to assess changes in groundwater seepage over the period between 2004 and 2015. This data release includes geospatial datasets, comma separated values (.csv) files, and associated FGDC-compliant metadata representing data collected between 2004 and 2015 as part of a
By
New England Water Science Center

Example data from MoisturEC: a new R program for moisture content estimation from electrical conductivity data

This dataset includes example data used for demonstration of the moisturEC program. This includes inverted electrical resistivity data, model resolution from the inversion, point moisture information, and conductivity-saturation calibration information. The data are from a field site in Coventry, CT outfitted with five, Decagon 5TE moisture probes, arranged along a 28 m transect at different depth
By
Water Resources Mission Area, Groundwater and Streamflow Information Program
Filter Total Items: 93

Field evaluation of semi-automated moisture estimation from geophysics using machine learning

Geophysical methods can provide three-dimensional (3D), spatially continuous estimates of soil moisture. However, point-to-point comparisons of geophysical properties to measure soil moisture data are frequently unsatisfactory, resulting in geophysics being used for qualitative purposes only. This is because (1) geophysics requires models that relate geophysical signals to soil moisture, (2) geoph
Authors
Neil Terry, F.D. Day-Lewis, John W. Lane, Carole D. Johnson, Dale Werkema
By
Water Resources Mission Area, New York Water Science Center

Electrical imaging for hydrogeology

Geophysical methods offer hydrogeologists unprecedented access to understanding subsurface parameters and processes. In this book, we outline the theory and application of electrical imaging methods, which inject current into the ground and measure the resultant potentials. These data are sensitive to rock type, grain size, porosity, pore fluid electrical conductivity, saturation, and temperature.
Authors
Kamini Singha, Timothy C. Johnson, Frederick Day-Lewis, Lee D. Slater
By
Water Resources Mission Area

Application of recursive estimation to heat tracing for groundwater/surface-water exchange

We present and demonstrate a recursive-estimation framework to infer groundwater/surface-water exchange based on temperature time series collected at different vertical depths below the sediment/water interface. We formulate the heat-transport problem as a state-space model (SSM), in which the spatial derivatives in the convection/conduction equation are approximated using finite differences. The
Authors
W. Anderson McAliley, Frederick Day-Lewis, David Rey, Martin Briggs, Allen M. Shapiro, Dale Werkema
By
Water Resources Mission Area

Incorporating snowmelt into daily estimates of recharge using a state-space model of infiltration

A state-space model (SSM) of infiltration estimates daily groundwater recharge using time-series of groundwater-level altitude and meteorological inputs (liquid precipitation, snowmelt, and evapotranspiration). The model includes diffuse and preferential flow through the unsaturated zone, where preferential flow is a function of liquid precipitation and snowmelt rates and a threshold rate, above w
Authors
Allen M. Shapiro, Frederick Day-Lewis, William M. Kappel, John H. Williams
By
Water Resources Mission Area

Reframing groundwater hydrology as a data-driven science

No abstract available. 
Authors
Allen M. Shapiro, F.D. Day-Lewis
By
Water Resources Mission Area

GW/SW-MST: A groundwater/surface-water method selection tool

Groundwater/surface-water (GW/SW) exchange and hyporheic processes are topics receiving increasing attention from the hydrologic community. Hydraulic, chemical, temperature, geophysical, and remote sensing methods are used to achieve various goals (e.g., inference of GW/SW exchange, mapping of bed materials, etc.), but the application of these methods is constrained by site conditions such as wate
Authors
Steven Hammett, Frederick Day-Lewis, Brett Russell Trottier, Paul M. Barlow, Martin A. Briggs, Geoffrey N. Delin, Judson Harvey, Carole D. Johnson, John W. Lane, D. O. Rosenberry, Dale D. Werkema
By
Water Resources Mission Area

Geostatistical mapping of salinity conditioned on borehole logs, Montebello Oil Field, California

We present a geostatistics-based stochastic salinity estimation framework for the Montebello Oil Field that capitalizes on available total dissolved solids (TDS) data from groundwater samples as well as electrical resistivity (ER) data from borehole logging. Data from TDS samples (n = 4924) was coded into an indicator framework based on falling below four selected thresholds (500, 1000, 3000, and
Authors
Neil Terry, Frederick Day-Lewis, Matthew K. Landon, Michael Land, Jennifer S. Stanton, John W. Lane
By
Water Resources Mission Area, California Water Science Center, New England Water Science Center

Estimating and forecasting time-varying groundwater recharge in fractured rock: A state-space formulation with preferential and diffuse flow to the water table

Rapid infiltration following precipitation may result in groundwater contamination from surface contaminants or pathogens. In fractured rock, contaminants can migrate rapidly to points of groundwater withdrawals. In contrast to the temporal availability of groundwater quality chemical indicators, meteorological and groundwater level observations are available in real-time to estimate time-varying
Authors
Allen M. Shapiro, Frederick Day-Lewis
By
Water Resources Mission Area

Electrical signatures of dual domain mass transfer observed in rock cores

No abstract available.
Authors
S. Falzone, B. B. Parker, Frederick Day-Lewis, L. Slater
By
Water Resources Mission Area

Exploring environmental factors that drive diel variations in tree water storage using wavelet analysis

Internal water storage within trees can be a critical reservoir that helps trees overcome both short- and long-duration environmental stresses. We monitored changes in internal tree water storage in a ponderosa pine on daily and seasonal scales using moisture probes, a dendrometer, and time-lapse electrical resistivity imaging (ERI). These data were used to investigate how patterns of in-tree wate
Authors
Ryan Harmon, Holly Barnard, Frederick Day-Lewis, Deqiang Mao, Kamini Singha
By
Water Resources Mission Area

Nuclear magnetic resonanance logs of fractured bedrock at the Hidden Lane Landfill site, Culpeper Basin, Virginia

In May 2018, the U.S. Geological Survey (USGS) in cooperation with the U.S. Environmental Protection Agency (EPA) collected borehole nuclear magnetic resonance (bNMR) logs in three boreholes completed in sandstone and siltstone of the Balls Bluff Member of the Bull Run Formation at a Superfund Site in Culpeper Basin, Virginia. The bNMR logs were used to aid in the evaluation of the aquifer by meas
Authors
Carole D. Johnson, Stephanie N. Phillips, Frederick D. Day-Lewis, Claire R. Tiedeman, Bruce Rundell, Edward Gilbert
By
Water Resources Mission Area

Evaluation of riverbed magnetic susceptibility for mapping biogeochemical hot spots in groundwater-impacted rivers

Redox hot spots occurring as metal-rich anoxic groundwater discharges through oxic wetland and river sediments commonly result in the formation of iron (Fe) oxide precipitates. These redox-sensitive precipitates influence the release of nutrients and metals to surface water and can act as ‘contaminant sponges’ by absorbing toxic compounds. We explore the feasibility of a non-invasive, high-resolut
Authors
Cheng-Hui Wang, Martin A. Briggs, Frederick Day-Lewis, L. Slater
By
Water Resources Mission Area

RDAVT

RDAVT.r is an R Shiny-based app used to estimate immobile porosity, mobile porosity, and the mass transfer rate coefficient in dual-domain porosity media. The app allows for interactive fitting of the fluid versus bulk conductivity hysteresis curve from electrical tracer experiments using a semi-analytic graphical approach.
By
New York Water Science Center

GW/SW-MST: A Groundwater/Surface-Water Method Selection Tool

The Groundwater/Surface-Water Method Selection Tool (GW/SW-MST) is a spreadsheet-based tool to help practitioners identify methods for use in groundwater/surface-water (GW/SW) exchange and hyporheic studies. GW/SW exchange and hyporheic processes are topics receiving increasing attention from the hydrologic community. Hydraulic, chemical, temperature, geophysical, and remote sensing methods are u
By
Water Resources Mission Area

DTSGUI

DTSGUI is a public-domain software tool to import, manage, parse/cull, georeference, analyze and visualize fiber-optic distributed temperature sensor (FO-DTS) data. Visualization can efficiently be accomplished in the form of heat maps of temperature (as color) versus distance and time, and in map view plots of georeferenced data on land-surface orthoimagery. The code is written in object-oriented
By
Water Resources Mission Area

FLASH-R (Flow-Log Analysis of Single Holes)

FLASH-R (Flow-Log Analysis of Single Holes) is an R app for the analysis of borehole vertical flow logs to estimate fracture (or layer) transmissivities and far-field hydraulic heads. This app is a new version of the FLASH spreadsheet tool by Day-Lewis et al. (2011) . The program is written in R, an open-source environment. All previous features have been retained and new features incorporated i
By
Water Resources Mission Area

FLASH-R: Flow-Log Analysis of Single Holes

FLASH-R (Flow-Log Analysis of Single Holes) is an R app for the analysis of borehole vertical flow logs to estimate fracture (or layer) transmissivities and far-field hydraulic heads.

By
Water Resources Mission Area

DTSGUI

DTSGUI is a  USGS software tool to import, manage, parse/cull, georeference, analyze and visualize fiber-optic distributed temperature sensor data.

By
Water Resources Mission Area

MoisturEC

MoisturEC is an R-based GUI used to combine electrical conductivity (EC) data with point moisture measurements for an updated moisture estimate capitalizing on the accuracy of point moisture measurements and the spatial coverage of EC data.
By
Water Resources Mission Area

MoisturEC: R-based GUI to combine electrical conductivity data with point moisture measurements

MoisturEC is an R-based GUI used to combine electrical conductivity (EC) data with point moisture measurements for an updated moisture estimate capitalizing on the accuracy of point moisture measurements and the spatial coverage of EC data. 

By
Water Resources Mission Area

Scenario Evaluator for Electrical Resistivity (SEER) Survey Pre-Modeling Tool

The USGS Scenario Evaluator for Electrical Resistivity (SEER) is a quick and simple Excel-based decision support tool practitioners can use to assess the likely outcome of using two-dimensional (2D) electrical resistivity imaging for site characterization and remediation monitoring.

By
Water Resources Mission Area

Fractured Rock Geophysical Toolbox Method Selection Tool (FRGT-MST)

The Fractured Rock Geophysical Toolbox Method Selection Tool (FRGT-MST) is an Excel-based tool for identification of geophysical methods most likely to be appropriate for project goals and site conditions.

By
Water Resources Mission Area

1DTempPro: A program for analysis of vertical one-dimensional (1D) temperature profiles

1DTempPro is a computer program for the analysis of one-dimensional vertical temperature profiles.

By
Water Resources Mission Area

FLASH: A Computer Program for Flow-Log Analysis of Single Holes

FLASH (Flow-Log Analysis of Single Holes) is a computer program for the analysis of borehole vertical flow logs.

By
Water Resources Mission Area, Groundwater and Streamflow Information Program, Nevada Water Science Center

Science and Products

link
Instrumentation set up in a valley near a mountain.

Hydrogeophysics Core Technology Team

About the Research. The Hydrogeophysics Core Technology Team (CTT) as part of the Environmental Health Program specializes in locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure and mapping hydrologic connectivity across varied landscapes.
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology
link

Hydrogeophysics Core Technology Team

About the Research. The Hydrogeophysics Core Technology Team (CTT) as part of the Environmental Health Program specializes in locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure and mapping hydrologic connectivity across varied landscapes.
Learn More
link
Charles Harvey (MIT) and Fred Day-Lewis (USGS) prepare fiber-optic distributed temperature system

Fiber-Optic Distributed Temperature Sensing Technology for Surface-Water and Groundwater Studies

Fiber-optic distributed temperature sensing (FO-DTS) technology can be used for characterizing estuary-aquifer and stream-aquifer interaction and for identifying transmissive fractures in bedrock boreholes.
By
Water Resources Mission Area
link

Fiber-Optic Distributed Temperature Sensing Technology for Surface-Water and Groundwater Studies

Fiber-optic distributed temperature sensing (FO-DTS) technology can be used for characterizing estuary-aquifer and stream-aquifer interaction and for identifying transmissive fractures in bedrock boreholes.
Learn More
link
thermal infrared image indicating groundwater discharging into surface water and mixing

Geophysics for USGS Groundwater/Surface Water Exchange Studies

Locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure, is essential to water-resource managers and hydrologists for the development of effective water-resource policy, protection, and management. The USGS conducts applied research to evaluate the use of new or emerging hydrogeophysical tools and methods to improve our understanding of...
By
Water Resources Mission Area
link

Geophysics for USGS Groundwater/Surface Water Exchange Studies

Locating and quantifying exchanges of groundwater and surface water, along with characterizing geologic structure, is essential to water-resource managers and hydrologists for the development of effective water-resource policy, protection, and management. The USGS conducts applied research to evaluate the use of new or emerging hydrogeophysical tools and methods to improve our understanding of...
Learn More
link
Fred Day-Lewis prepares the on-site field office, where real-time geophysical data record real-time geophysical data

Optimized Enhanced Bioremediation through 4D Geophysical Monitoring and Autonomous Data Collection, Processing, and Analysis

The USGS Office of Ground Water, Branch of Geophysics (OGW BG) is collaborating on an applied research project to evaluate the use of new hydrogeophysical tools to remotely monitor and visualize subsurface bioremediation amendment emplacement and transport in near real-time. The project, funded by the U.S. Department of Defense Environmental Security Technology Certification Program, could provide...
By
Water Resources Mission Area
link

Optimized Enhanced Bioremediation through 4D Geophysical Monitoring and Autonomous Data Collection, Processing, and Analysis

The USGS Office of Ground Water, Branch of Geophysics (OGW BG) is collaborating on an applied research project to evaluate the use of new hydrogeophysical tools to remotely monitor and visualize subsurface bioremediation amendment emplacement and transport in near real-time. The project, funded by the U.S. Department of Defense Environmental Security Technology Certification Program, could provide...
Learn More
link
Hannan Karam (MIT) connects the distributed temperature sensor to a laptop computer. This allows temp data to be monitored

Fiber-Optic Distributed Temperature Sensing in Waquoit Bay, Massachusetts

In 2006 the USGS Office of Groundwater, Branch of Geophysics (OGW BG) conducted a technology demonstration and evaluation project in Waquoit Bay, East Falmouth, Massachusetts, to evaluate the use of fiber-optic distributed temperature sensing (FO-DTS). In this project, the USGS used FO-DTS to investigate aquifer-estuary interaction by monitoring submarine groundwater discharge in Waquoit Bay. OGW...
By
Water Resources Mission Area
link

Fiber-Optic Distributed Temperature Sensing in Waquoit Bay, Massachusetts

In 2006 the USGS Office of Groundwater, Branch of Geophysics (OGW BG) conducted a technology demonstration and evaluation project in Waquoit Bay, East Falmouth, Massachusetts, to evaluate the use of fiber-optic distributed temperature sensing (FO-DTS). In this project, the USGS used FO-DTS to investigate aquifer-estuary interaction by monitoring submarine groundwater discharge in Waquoit Bay. OGW...
Learn More

Data release for tempest1d: Recursive Estimation of Vertical Groundwater/Surface-Water Exchange using Heat Tracing

This data release provides a recursive-estimation framework to infer groundwater/surface-water exchange based on temperature time series collected at different vertical depths below the sediment/water interface. A heat-transport problem was formulated as a state-space model (SSM), in which the spatial derivatives in the convection/conduction equation are approximated using finite differences. The
By
Water Resources Mission Area

Selected borehole geophysical logs from three contaminant sites in California, Wisconsin, and New Jersey

Borehole geophysical logs were collected to characterize bedrock aquifers at three contamination sites located in California, Wisconsin, and New Jersey. The data were collected by the U.S. Geological Survey (USGS) and the University of Guelph from 2014 to 2015 as part of the U.S. Department of Defense Strategic Environmental Research and Development Program (SERDP) and Environmental Security Techn
By
Water Resources Mission Area

Algorithms for model parameter estimation, state estimation, and forecasting applied to a State-Space model coupled with the Kalman Filter for one-dimensional vertical infiltration to fractured rock aquifers

The algorithms and input data included in this data release are used to interpret time-series data (water- table altitude, precipitation, and potential evapotranspiration) over an observation period to estimate model parameters of a State-Space (SS) model of vertical infiltration to a fractured-rock aquifer. The SS model is coupled with a Kalman Filter (KF) to estimate system states (water-table a

Hydrogeochemical data for the characterization of stream, groundwater, and beaver-induced floodplain exchange in the East River Science Focus Area, Crested Butte, CO

The U.S. Geological Survey, along with scientists from Rutgers University, collected water chemistry, electromagnetic, redox-potential, dissolved oxygen, water flow rate, and water temperature data along stream and river corridors in multiple sub-watersheds of the East River Science Focus Area (SFA) near Crested Butte, CO. The concept of 'river corridor' science recognizes that the quality of flow
By
Water Resources Mission Area

Geophysical data from the unnamed lake at the National Crude Oil Spill Fate and Natural Attenuation Research Site, Bemidji, MN (ver. 3.0, May 2022)

The National Crude Oil Spill Fate and Natural Attenuation Research Site is located near Bemidji, MN, USA. A high-pressure oil pipeline ruptured in 1979 releasing ~1.7 million liters of light crude oil, which sprayed over an area of ~6500 square meters and collected in topographic depressions. Approximately 75% of the spilled oil was recovered. Much of the remainder reached the water table, where i
By
Water Resources Mission Area

Electrical geophysical data collected in the shallow sediments of Snake Pond, Cape Cod, USA

Quantification of mobile/less-mobile porosity dynamics at the sediment/water interface is critical to predicting contaminant storage, release, and transformation processes. Zones in groundwater flow-through lakes where lake water recharges the aquifer can strongly control aquifer water quality. Less-mobile porosity has previously been characterized in aquifers using flow path scale (10's of m+) tr
By
Water Resources Mission Area, Contaminant Biology, Environmental Health Program, Groundwater and Streamflow Information Program, Toxic Substances Hydrology

Temperature and seepage data from a lake-bottom permeable reactive barrier, Ashumet Pond, Falmouth, MA, 2004-2015.

These data were collected to evaluate groundwater/surface-water exchange in the area of a lake-bottom permeable reactive barrier and to assess changes in groundwater seepage over the period between 2004 and 2015. This data release includes geospatial datasets, comma separated values (.csv) files, and associated FGDC-compliant metadata representing data collected between 2004 and 2015 as part of a
By
New England Water Science Center

Example data from MoisturEC: a new R program for moisture content estimation from electrical conductivity data

This dataset includes example data used for demonstration of the moisturEC program. This includes inverted electrical resistivity data, model resolution from the inversion, point moisture information, and conductivity-saturation calibration information. The data are from a field site in Coventry, CT outfitted with five, Decagon 5TE moisture probes, arranged along a 28 m transect at different depth
By
Water Resources Mission Area, Groundwater and Streamflow Information Program
Filter Total Items: 93

Field evaluation of semi-automated moisture estimation from geophysics using machine learning

Geophysical methods can provide three-dimensional (3D), spatially continuous estimates of soil moisture. However, point-to-point comparisons of geophysical properties to measure soil moisture data are frequently unsatisfactory, resulting in geophysics being used for qualitative purposes only. This is because (1) geophysics requires models that relate geophysical signals to soil moisture, (2) geoph
Authors
Neil Terry, F.D. Day-Lewis, John W. Lane, Carole D. Johnson, Dale Werkema
By
Water Resources Mission Area, New York Water Science Center

Electrical imaging for hydrogeology

Geophysical methods offer hydrogeologists unprecedented access to understanding subsurface parameters and processes. In this book, we outline the theory and application of electrical imaging methods, which inject current into the ground and measure the resultant potentials. These data are sensitive to rock type, grain size, porosity, pore fluid electrical conductivity, saturation, and temperature.
Authors
Kamini Singha, Timothy C. Johnson, Frederick Day-Lewis, Lee D. Slater
By
Water Resources Mission Area

Application of recursive estimation to heat tracing for groundwater/surface-water exchange

We present and demonstrate a recursive-estimation framework to infer groundwater/surface-water exchange based on temperature time series collected at different vertical depths below the sediment/water interface. We formulate the heat-transport problem as a state-space model (SSM), in which the spatial derivatives in the convection/conduction equation are approximated using finite differences. The
Authors
W. Anderson McAliley, Frederick Day-Lewis, David Rey, Martin Briggs, Allen M. Shapiro, Dale Werkema
By
Water Resources Mission Area

Incorporating snowmelt into daily estimates of recharge using a state-space model of infiltration

A state-space model (SSM) of infiltration estimates daily groundwater recharge using time-series of groundwater-level altitude and meteorological inputs (liquid precipitation, snowmelt, and evapotranspiration). The model includes diffuse and preferential flow through the unsaturated zone, where preferential flow is a function of liquid precipitation and snowmelt rates and a threshold rate, above w
Authors
Allen M. Shapiro, Frederick Day-Lewis, William M. Kappel, John H. Williams
By
Water Resources Mission Area

Reframing groundwater hydrology as a data-driven science

No abstract available. 
Authors
Allen M. Shapiro, F.D. Day-Lewis
By
Water Resources Mission Area

GW/SW-MST: A groundwater/surface-water method selection tool

Groundwater/surface-water (GW/SW) exchange and hyporheic processes are topics receiving increasing attention from the hydrologic community. Hydraulic, chemical, temperature, geophysical, and remote sensing methods are used to achieve various goals (e.g., inference of GW/SW exchange, mapping of bed materials, etc.), but the application of these methods is constrained by site conditions such as wate
Authors
Steven Hammett, Frederick Day-Lewis, Brett Russell Trottier, Paul M. Barlow, Martin A. Briggs, Geoffrey N. Delin, Judson Harvey, Carole D. Johnson, John W. Lane, D. O. Rosenberry, Dale D. Werkema
By
Water Resources Mission Area

Geostatistical mapping of salinity conditioned on borehole logs, Montebello Oil Field, California

We present a geostatistics-based stochastic salinity estimation framework for the Montebello Oil Field that capitalizes on available total dissolved solids (TDS) data from groundwater samples as well as electrical resistivity (ER) data from borehole logging. Data from TDS samples (n = 4924) was coded into an indicator framework based on falling below four selected thresholds (500, 1000, 3000, and
Authors
Neil Terry, Frederick Day-Lewis, Matthew K. Landon, Michael Land, Jennifer S. Stanton, John W. Lane
By
Water Resources Mission Area, California Water Science Center, New England Water Science Center

Estimating and forecasting time-varying groundwater recharge in fractured rock: A state-space formulation with preferential and diffuse flow to the water table

Rapid infiltration following precipitation may result in groundwater contamination from surface contaminants or pathogens. In fractured rock, contaminants can migrate rapidly to points of groundwater withdrawals. In contrast to the temporal availability of groundwater quality chemical indicators, meteorological and groundwater level observations are available in real-time to estimate time-varying
Authors
Allen M. Shapiro, Frederick Day-Lewis
By
Water Resources Mission Area

Electrical signatures of dual domain mass transfer observed in rock cores

No abstract available.
Authors
S. Falzone, B. B. Parker, Frederick Day-Lewis, L. Slater
By
Water Resources Mission Area

Exploring environmental factors that drive diel variations in tree water storage using wavelet analysis

Internal water storage within trees can be a critical reservoir that helps trees overcome both short- and long-duration environmental stresses. We monitored changes in internal tree water storage in a ponderosa pine on daily and seasonal scales using moisture probes, a dendrometer, and time-lapse electrical resistivity imaging (ERI). These data were used to investigate how patterns of in-tree wate
Authors
Ryan Harmon, Holly Barnard, Frederick Day-Lewis, Deqiang Mao, Kamini Singha
By
Water Resources Mission Area

Nuclear magnetic resonanance logs of fractured bedrock at the Hidden Lane Landfill site, Culpeper Basin, Virginia

In May 2018, the U.S. Geological Survey (USGS) in cooperation with the U.S. Environmental Protection Agency (EPA) collected borehole nuclear magnetic resonance (bNMR) logs in three boreholes completed in sandstone and siltstone of the Balls Bluff Member of the Bull Run Formation at a Superfund Site in Culpeper Basin, Virginia. The bNMR logs were used to aid in the evaluation of the aquifer by meas
Authors
Carole D. Johnson, Stephanie N. Phillips, Frederick D. Day-Lewis, Claire R. Tiedeman, Bruce Rundell, Edward Gilbert
By
Water Resources Mission Area

Evaluation of riverbed magnetic susceptibility for mapping biogeochemical hot spots in groundwater-impacted rivers

Redox hot spots occurring as metal-rich anoxic groundwater discharges through oxic wetland and river sediments commonly result in the formation of iron (Fe) oxide precipitates. These redox-sensitive precipitates influence the release of nutrients and metals to surface water and can act as ‘contaminant sponges’ by absorbing toxic compounds. We explore the feasibility of a non-invasive, high-resolut
Authors
Cheng-Hui Wang, Martin A. Briggs, Frederick Day-Lewis, L. Slater
By
Water Resources Mission Area

RDAVT

RDAVT.r is an R Shiny-based app used to estimate immobile porosity, mobile porosity, and the mass transfer rate coefficient in dual-domain porosity media. The app allows for interactive fitting of the fluid versus bulk conductivity hysteresis curve from electrical tracer experiments using a semi-analytic graphical approach.
By
New York Water Science Center

GW/SW-MST: A Groundwater/Surface-Water Method Selection Tool

The Groundwater/Surface-Water Method Selection Tool (GW/SW-MST) is a spreadsheet-based tool to help practitioners identify methods for use in groundwater/surface-water (GW/SW) exchange and hyporheic studies. GW/SW exchange and hyporheic processes are topics receiving increasing attention from the hydrologic community. Hydraulic, chemical, temperature, geophysical, and remote sensing methods are u
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Water Resources Mission Area

DTSGUI

DTSGUI is a public-domain software tool to import, manage, parse/cull, georeference, analyze and visualize fiber-optic distributed temperature sensor (FO-DTS) data. Visualization can efficiently be accomplished in the form of heat maps of temperature (as color) versus distance and time, and in map view plots of georeferenced data on land-surface orthoimagery. The code is written in object-oriented
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Water Resources Mission Area

FLASH-R (Flow-Log Analysis of Single Holes)

FLASH-R (Flow-Log Analysis of Single Holes) is an R app for the analysis of borehole vertical flow logs to estimate fracture (or layer) transmissivities and far-field hydraulic heads. This app is a new version of the FLASH spreadsheet tool by Day-Lewis et al. (2011) . The program is written in R, an open-source environment. All previous features have been retained and new features incorporated i
By
Water Resources Mission Area

FLASH-R: Flow-Log Analysis of Single Holes

FLASH-R (Flow-Log Analysis of Single Holes) is an R app for the analysis of borehole vertical flow logs to estimate fracture (or layer) transmissivities and far-field hydraulic heads.

By
Water Resources Mission Area

DTSGUI

DTSGUI is a  USGS software tool to import, manage, parse/cull, georeference, analyze and visualize fiber-optic distributed temperature sensor data.

By
Water Resources Mission Area

MoisturEC

MoisturEC is an R-based GUI used to combine electrical conductivity (EC) data with point moisture measurements for an updated moisture estimate capitalizing on the accuracy of point moisture measurements and the spatial coverage of EC data.
By
Water Resources Mission Area

MoisturEC: R-based GUI to combine electrical conductivity data with point moisture measurements

MoisturEC is an R-based GUI used to combine electrical conductivity (EC) data with point moisture measurements for an updated moisture estimate capitalizing on the accuracy of point moisture measurements and the spatial coverage of EC data. 

By
Water Resources Mission Area

Scenario Evaluator for Electrical Resistivity (SEER) Survey Pre-Modeling Tool

The USGS Scenario Evaluator for Electrical Resistivity (SEER) is a quick and simple Excel-based decision support tool practitioners can use to assess the likely outcome of using two-dimensional (2D) electrical resistivity imaging for site characterization and remediation monitoring.

By
Water Resources Mission Area

Fractured Rock Geophysical Toolbox Method Selection Tool (FRGT-MST)

The Fractured Rock Geophysical Toolbox Method Selection Tool (FRGT-MST) is an Excel-based tool for identification of geophysical methods most likely to be appropriate for project goals and site conditions.

By
Water Resources Mission Area

1DTempPro: A program for analysis of vertical one-dimensional (1D) temperature profiles

1DTempPro is a computer program for the analysis of one-dimensional vertical temperature profiles.

By
Water Resources Mission Area

FLASH: A Computer Program for Flow-Log Analysis of Single Holes

FLASH (Flow-Log Analysis of Single Holes) is a computer program for the analysis of borehole vertical flow logs.

By
Water Resources Mission Area, Groundwater and Streamflow Information Program, Nevada Water Science Center
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