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Sandra Eberts (Former Employee)

Science and Products

A scientist sits in front of a public-supply well collecting a sample

Public-Supply Well Pumping Regimes Influence Quality of Water Produced

U.S. Geological Survey (USGS) scientists studying the vulnerability of public-supply wells to contamination have identified ways in which the seasonal operation of public-supply wells can affect the quality of water that they produce. By incorporating historical water-quality data into models of fluid flow, USGS scientists were able to estimate the amount of contaminated groundwater reaching a...
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology
Public-Supply Well Pumping Regimes Influence Quality of Water Produced

Public-Supply Well Pumping Regimes Influence Quality of Water Produced

U.S. Geological Survey (USGS) scientists studying the vulnerability of public-supply wells to contamination have identified ways in which the seasonal operation of public-supply wells can affect the quality of water that they produce. By incorporating historical water-quality data into models of fluid flow, USGS scientists were able to estimate the amount of contaminated groundwater reaching a...
Learn More
Filter Total Items: 42

Phosphorus (P) and HABs: Sources of P discharged from the Maumee River into Lake Erie Phosphorus (P) and HABs: Sources of P discharged from the Maumee River into Lake Erie

No abstract available.
Authors
Rebecca Logsdon Muenich, Laura Johnson, John F. Bratton, Kristin DeVanna Fussell, Doug Kane, Margaret Kalcic, Dale M. Robertson, Sandra M. Eberts, Mary Anne Evans, Kenneth J. Gibbons
By
Water Resources Mission Area

Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities

Cyanobacterial harmful algal blooms (CyanoHABs) are increasingly a global concern because CyanoHABs pose a threat to human and aquatic ecosystem health and cause economic damages. Despite advances in scientific understanding of cyanobacteria and associated compounds, many unanswered questions remain about occurrence, environmental triggers for toxicity, and the ability to predict the...
Authors
Jennifer L. Graham, Neil M. Dubrovsky, Sandra M. Eberts
By
Water Resources Mission Area

A ternary age-mixing model to explain contaminant occurrence in a deep supply well A ternary age-mixing model to explain contaminant occurrence in a deep supply well

The age distribution of water from a public-supply well in a deep alluvial aquifer was estimated and used to help explain arsenic variability in the water. The age distribution was computed using a ternary mixing model that combines three lumped parameter models of advection-dispersion transport of environmental tracers, which represent relatively recent recharge (post- 1950s) containing...
Authors
Bryant C. Jurgens, Laura M. Bexfield, Sandra M. Eberts
By
Water Resources Mission Area, California Water Science Center

If groundwater is contaminated, will water from the well be contaminated? If groundwater is contaminated, will water from the well be contaminated?

No abstract available.
Authors
Sandra M. Eberts
By
Water Resources Mission Area

Educational webtool illustrating groundwater age effects on contaminant trends in wells Educational webtool illustrating groundwater age effects on contaminant trends in wells

No abstract available.
Authors
John Karl Böhlke, Bryant C. Jurgens, David J. Uselmann, Sandra M. Eberts
By
Ecosystems Mission Area, Water Resources Mission Area, Environmental Health Program, Toxic Substances Hydrology, California Water Science Center, Chesapeake Bay Activities

Modeling nitrate at domestic and public-supply well depths in the Central Valley, California Modeling nitrate at domestic and public-supply well depths in the Central Valley, California

Aquifer vulnerability models were developed to map groundwater nitrate concentration at domestic and public-supply well depths in the Central Valley, California. We compared three modeling methods for ability to predict nitrate concentration >4 mg/L: logistic regression (LR), random forest classification (RFC), and random forest regression (RFR). All three models indicated processes of...
Authors
Bernard T. Nolan, JoAnn M. Gronberg, Claudia C. Faunt, Sandra M. Eberts, Ken Belitz
By
Water Resources Mission Area, California Water Science Center

Non-USGS Publications**

Landon, M.K., Jurgens, B.C., Katz, B.G., Eberts, S.M., Burow, K.R., and Crandall, C.A., 2010, Depth-dependent sampling to identify short-circuit pathways to public-supply wells in multiple aquifer settings in the United States: Hydrogeology Journal, v. 18, no. 3, p. 577-593.
Eberts, S.M., Harvey, G.J., Beckman, S.W., and Jones, S.A., 2003, Multiple process assessment for a chlorinated-solvent plume, In Phytoremediation: Transformation and Control of Contaminants, McCutcheon, S.C. and Schnoor, J.L., eds.: New York, John Wiley and Sons, Inc.
Eberts, S., Schalk, C., Vose, J. and Harvey, G., 2000, Hydrologic effects of cottonwood trees on a shallow aquifer containing trichloroethene: Hydrological Science and Technology, v. 15, p. 115-121.
Bair, E.S., Sheets, R.A., and Eberts, S.M., 1990, Particle-tracking Analysis of flow paths and traveltimes from hypothetical spill sites within the capture area of a wellfield: Ground Water, 28: 884-892. doi:10.1111/j.1745-6584.1990.tb01724.x.

**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

A scientist sits in front of a public-supply well collecting a sample

Public-Supply Well Pumping Regimes Influence Quality of Water Produced

U.S. Geological Survey (USGS) scientists studying the vulnerability of public-supply wells to contamination have identified ways in which the seasonal operation of public-supply wells can affect the quality of water that they produce. By incorporating historical water-quality data into models of fluid flow, USGS scientists were able to estimate the amount of contaminated groundwater reaching a...
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology
Public-Supply Well Pumping Regimes Influence Quality of Water Produced

Public-Supply Well Pumping Regimes Influence Quality of Water Produced

U.S. Geological Survey (USGS) scientists studying the vulnerability of public-supply wells to contamination have identified ways in which the seasonal operation of public-supply wells can affect the quality of water that they produce. By incorporating historical water-quality data into models of fluid flow, USGS scientists were able to estimate the amount of contaminated groundwater reaching a...
Learn More
Filter Total Items: 42

Phosphorus (P) and HABs: Sources of P discharged from the Maumee River into Lake Erie Phosphorus (P) and HABs: Sources of P discharged from the Maumee River into Lake Erie

No abstract available.
Authors
Rebecca Logsdon Muenich, Laura Johnson, John F. Bratton, Kristin DeVanna Fussell, Doug Kane, Margaret Kalcic, Dale M. Robertson, Sandra M. Eberts, Mary Anne Evans, Kenneth J. Gibbons
By
Water Resources Mission Area

Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities

Cyanobacterial harmful algal blooms (CyanoHABs) are increasingly a global concern because CyanoHABs pose a threat to human and aquatic ecosystem health and cause economic damages. Despite advances in scientific understanding of cyanobacteria and associated compounds, many unanswered questions remain about occurrence, environmental triggers for toxicity, and the ability to predict the...
Authors
Jennifer L. Graham, Neil M. Dubrovsky, Sandra M. Eberts
By
Water Resources Mission Area

A ternary age-mixing model to explain contaminant occurrence in a deep supply well A ternary age-mixing model to explain contaminant occurrence in a deep supply well

The age distribution of water from a public-supply well in a deep alluvial aquifer was estimated and used to help explain arsenic variability in the water. The age distribution was computed using a ternary mixing model that combines three lumped parameter models of advection-dispersion transport of environmental tracers, which represent relatively recent recharge (post- 1950s) containing...
Authors
Bryant C. Jurgens, Laura M. Bexfield, Sandra M. Eberts
By
Water Resources Mission Area, California Water Science Center

If groundwater is contaminated, will water from the well be contaminated? If groundwater is contaminated, will water from the well be contaminated?

No abstract available.
Authors
Sandra M. Eberts
By
Water Resources Mission Area

Educational webtool illustrating groundwater age effects on contaminant trends in wells Educational webtool illustrating groundwater age effects on contaminant trends in wells

No abstract available.
Authors
John Karl Böhlke, Bryant C. Jurgens, David J. Uselmann, Sandra M. Eberts
By
Ecosystems Mission Area, Water Resources Mission Area, Environmental Health Program, Toxic Substances Hydrology, California Water Science Center, Chesapeake Bay Activities

Modeling nitrate at domestic and public-supply well depths in the Central Valley, California Modeling nitrate at domestic and public-supply well depths in the Central Valley, California

Aquifer vulnerability models were developed to map groundwater nitrate concentration at domestic and public-supply well depths in the Central Valley, California. We compared three modeling methods for ability to predict nitrate concentration >4 mg/L: logistic regression (LR), random forest classification (RFC), and random forest regression (RFR). All three models indicated processes of...
Authors
Bernard T. Nolan, JoAnn M. Gronberg, Claudia C. Faunt, Sandra M. Eberts, Ken Belitz
By
Water Resources Mission Area, California Water Science Center

Non-USGS Publications**

Landon, M.K., Jurgens, B.C., Katz, B.G., Eberts, S.M., Burow, K.R., and Crandall, C.A., 2010, Depth-dependent sampling to identify short-circuit pathways to public-supply wells in multiple aquifer settings in the United States: Hydrogeology Journal, v. 18, no. 3, p. 577-593.
Eberts, S.M., Harvey, G.J., Beckman, S.W., and Jones, S.A., 2003, Multiple process assessment for a chlorinated-solvent plume, In Phytoremediation: Transformation and Control of Contaminants, McCutcheon, S.C. and Schnoor, J.L., eds.: New York, John Wiley and Sons, Inc.
Eberts, S., Schalk, C., Vose, J. and Harvey, G., 2000, Hydrologic effects of cottonwood trees on a shallow aquifer containing trichloroethene: Hydrological Science and Technology, v. 15, p. 115-121.
Bair, E.S., Sheets, R.A., and Eberts, S.M., 1990, Particle-tracking Analysis of flow paths and traveltimes from hypothetical spill sites within the capture area of a wellfield: Ground Water, 28: 884-892. doi:10.1111/j.1745-6584.1990.tb01724.x.

**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.

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