An exceptional earth science teacher kindled my interest in earthquakes and plate tectonics. Working as a geophysicist doing marine geology, I saw a need to maintain healthy freshwater supplies, and morphed into a geo-hydrologist. I apply geophysics for groundwater basin analysis, study aquifer mechanics and land subsidence, and model groundwater flow and transport at regional and local scales.
Professional Experience
U.S. Geological Survey, 1985-present
Watkins-Johnson Company, Palo Alto, 1979-1980
Education and Certifications
M.S. Earth Science, University of California, Santa Cruz, 1984
B.S. Earth Science, University of California, Santa Cruz, 1982
Science and Products
Simulation of Groundwater Flow in the "1,500-Foot" and "2,000-Foot" Sands and Movement of Saltwater in the “2000-Foot” Sand of the Baton Rouge Area, Louisiana
Saltwater encroachment has been detected in six aquifers, including the "1,500-foot" and "2,000-foot" sands, north of the Baton Rouge fault in East Baton Rouge Parish. The encroachment is in response to ground-water withdrawals, primarily for public supply and industrial uses, in Baton Rouge. Additional information is needed for water planners and managers in the Baton Rouge area to make decisions...
Filter Total Items: 16
Simulation of groundwater flow and chloride transport in the “1,500-foot” sand, “2,400-foot” sand, and “2,800-foot” sand of the Baton Rouge area, Louisiana
Groundwater withdrawals since the 1940s have lowered water levels, altered groundwater-flow directions, and caused saltwater to intrude within some freshwater-containing sands of the fluvial-deltaic Southern Hills regional aquifer system beneath Baton Rouge, Louisiana. New interpretations of stratigraphic correlations amongst geophysical well logs were utilized to revise a hydrogeologic framework
Authors
Charles E. Heywood, Maxwell A. Lindaman, John K. Lovelace
Simulation of groundwater storage changes in the eastern Pasco Basin, Washington
The Miocene Columbia River Basalt Group and younger sedimentary deposits of lacustrine, fluvial, eolian, and cataclysmic-flood origins compose the aquifer system of the Pasco Basin in eastern Washington. Irrigation return flow and canal leakage from the Columbia Basin Project have caused groundwater levels to rise substantially in some areas, contributing to landslides along the Columbia River. Wa
Authors
Charles E. Heywood, Sue C. Kahle, Theresa D. Olsen, James D. Patterson, Erick Burns
Simulation of groundwater flow and chloride transport in the “1,200-foot” sand with scenarios to mitigate saltwater migration in the “2,000-foot” sand in the Baton Rouge area, Louisiana
Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. The 10 aquifers beneath the Baton Rouge area, which includes East and West Baton Rouge Parishes, Pointe Coupee Parish, and East and West Feliciana Parishes, provided about 184.3 million gallons per day (Mgal/d) for public supply and industrial use in 2012. Groundwater withdraw
Authors
Charles E. Heywood, John K. Lovelace, Jason M. Griffith
Simulation of the effects of seasonally varying pumping on intraborehole flow and the vulnerability of public-supply wells to contamination
Public-supply wells with long screens in alluvial aquifers can produce waters of differing quality from different depths. Seasonal changes in quality are linked to seasonal changes in pumping rates that influence the distribution of flow into the well screens under pumping conditions and the magnitude and direction of intraborehole flow within the wells under ambient conditions. Groundwater flow a
Authors
Richard M. Yager, Charles E. Heywood
Simulation of groundwater flow in the "1,500-foot" sand and "2,000-foot" sand and movement of saltwater in the "2,000-foot" sand of the Baton Rouge area, Louisiana
Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. Groundwater investigations in the 1960s identified a freshwater-saltwater interface located at the Baton Rouge Fault, across which abrupt changes in water levels occur. Aquifers south of the fault generally contain saltwater, and aquifers north of the fault contain freshwater,
Authors
Charles E. Heywood, Jason M. Griffith
Simulations of groundwater flow, transport, and age in Albuquerque, New Mexico, for a study of transport of anthropogenic and natural contaminants (TANC) to public-supply wells
Vulnerability to contamination from manmade and natural sources can be characterized by the groundwater-age distribution measured in a supply well and the associated implications for the source depths of the withdrawn water. Coupled groundwater flow and transport models were developed to simulate the transport of the geochemical age-tracers carbon-14, tritium, and three chlorofluorocarbon species
Authors
Charles E. Heywood
Assessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico
This fact sheet highlights findings from the vulnerability study of a public-supply well in Albuquerque, New Mexico (hereafter referred to as “the study well”). The study well produces about 3,000 gallons of water per minute from the Rio Grande aquifer system. Water samples were collected at the study well, at two other nearby public-supply wells, and at monitoring wells installed in or near the s
Authors
Martha L. Jagucki, Laura M. Bexfield, Charles E. Heywood, Sandra M. Eberts
Simulation of Groundwater Flow in the Coastal Plain Aquifer System of Virginia
The groundwater model documented in this report simulates the transient evolution of water levels in the aquifers and confining units of the Virginia Coastal Plain and adjacent portions of Maryland and North Carolina since 1890. Groundwater withdrawals have lowered water levels in Virginia Coastal Plain aquifers and have resulted in drawdown in the Potomac aquifer exceeding 200 feet in some areas.
Authors
Charles E. Heywood, Jason P. Pope
Summary of extensometric measurements in El Paso, Texas
Two counter-weighted-pipe borehole extensometers were installed on the left bank of the Rio Grande between El Paso, Texas, and Ciudad Juarez, Chihuahua, Mexico, in 1992. A shallow extensometer measures vertical compaction in the 6- to 100-meter aquifer-system depth interval. A deep extensometer measures vertical compaction in the 6- to 305-meter aquifer-system depth interval. Both extensometers ar
Authors
Charles E. Heywood
Simulated ground-water flow in the Hueco Bolson, an alluvial-basin aquifer system near El Paso, Texas
The neighboring cities of El Paso, Texas, and Ciudad Juarez, Chihuahua, Mexico, have historically relied on ground-water withdrawals from the Hueco Bolson, an alluvial-aquifer system, to supply water to their growing populations. By 1996, ground-water drawdown exceeded 60 meters in some areas under Ciudad Juarez and El Paso. A simulation of steady-state and transient ground-water flow in the Hueco
Authors
Charles E. Heywood, Richard M. Yager
Chemistry and age of ground water in the southwestern Hueco Bolson, New Mexico and Texas
This report, prepared in cooperation with El Paso Water Utilities, presents the results of an investigation to determine the chemistry and age of ground water on the southwestern side of the Hueco Bolson. The radioactive isotope carbon-14 was used to estimate the length of time that water from wells has been isolated from the atmosphere, which is the modern carbon-14 reservoir. Nine wells on the s
Authors
Scott K. Anderholm, Charles E. Heywood
Ground displacements caused by aquifer-system water-level variations observed using interferometric synthetic aperture radar near Albuquerque, New Mexico
Six synthetic aperture radar (SAR) images were
processed to form five unwrapped interferometric
(InSAR) images of the greater metropolitan area in the
Albuquerque Basin. Most interference patterns in the
images were caused by range displacements resulting
from changes in land-surface elevation. Loci of land-
surface elevation changes correlate with changes in
aquifer-system water leve
Authors
Charles E. Heywood, Devin L. Galloway, Sylvia V. Stork
Science and Products
- Science
Simulation of Groundwater Flow in the "1,500-Foot" and "2,000-Foot" Sands and Movement of Saltwater in the “2000-Foot” Sand of the Baton Rouge Area, Louisiana
Saltwater encroachment has been detected in six aquifers, including the "1,500-foot" and "2,000-foot" sands, north of the Baton Rouge fault in East Baton Rouge Parish. The encroachment is in response to ground-water withdrawals, primarily for public supply and industrial uses, in Baton Rouge. Additional information is needed for water planners and managers in the Baton Rouge area to make decisions... - Publications
Filter Total Items: 16
Simulation of groundwater flow and chloride transport in the “1,500-foot” sand, “2,400-foot” sand, and “2,800-foot” sand of the Baton Rouge area, Louisiana
Groundwater withdrawals since the 1940s have lowered water levels, altered groundwater-flow directions, and caused saltwater to intrude within some freshwater-containing sands of the fluvial-deltaic Southern Hills regional aquifer system beneath Baton Rouge, Louisiana. New interpretations of stratigraphic correlations amongst geophysical well logs were utilized to revise a hydrogeologic frameworkAuthorsCharles E. Heywood, Maxwell A. Lindaman, John K. LovelaceSimulation of groundwater storage changes in the eastern Pasco Basin, Washington
The Miocene Columbia River Basalt Group and younger sedimentary deposits of lacustrine, fluvial, eolian, and cataclysmic-flood origins compose the aquifer system of the Pasco Basin in eastern Washington. Irrigation return flow and canal leakage from the Columbia Basin Project have caused groundwater levels to rise substantially in some areas, contributing to landslides along the Columbia River. WaAuthorsCharles E. Heywood, Sue C. Kahle, Theresa D. Olsen, James D. Patterson, Erick BurnsSimulation of groundwater flow and chloride transport in the “1,200-foot” sand with scenarios to mitigate saltwater migration in the “2,000-foot” sand in the Baton Rouge area, Louisiana
Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. The 10 aquifers beneath the Baton Rouge area, which includes East and West Baton Rouge Parishes, Pointe Coupee Parish, and East and West Feliciana Parishes, provided about 184.3 million gallons per day (Mgal/d) for public supply and industrial use in 2012. Groundwater withdrawAuthorsCharles E. Heywood, John K. Lovelace, Jason M. GriffithSimulation of the effects of seasonally varying pumping on intraborehole flow and the vulnerability of public-supply wells to contamination
Public-supply wells with long screens in alluvial aquifers can produce waters of differing quality from different depths. Seasonal changes in quality are linked to seasonal changes in pumping rates that influence the distribution of flow into the well screens under pumping conditions and the magnitude and direction of intraborehole flow within the wells under ambient conditions. Groundwater flow aAuthorsRichard M. Yager, Charles E. HeywoodSimulation of groundwater flow in the "1,500-foot" sand and "2,000-foot" sand and movement of saltwater in the "2,000-foot" sand of the Baton Rouge area, Louisiana
Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. Groundwater investigations in the 1960s identified a freshwater-saltwater interface located at the Baton Rouge Fault, across which abrupt changes in water levels occur. Aquifers south of the fault generally contain saltwater, and aquifers north of the fault contain freshwater,AuthorsCharles E. Heywood, Jason M. GriffithSimulations of groundwater flow, transport, and age in Albuquerque, New Mexico, for a study of transport of anthropogenic and natural contaminants (TANC) to public-supply wells
Vulnerability to contamination from manmade and natural sources can be characterized by the groundwater-age distribution measured in a supply well and the associated implications for the source depths of the withdrawn water. Coupled groundwater flow and transport models were developed to simulate the transport of the geochemical age-tracers carbon-14, tritium, and three chlorofluorocarbon speciesAuthorsCharles E. HeywoodAssessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico
This fact sheet highlights findings from the vulnerability study of a public-supply well in Albuquerque, New Mexico (hereafter referred to as “the study well”). The study well produces about 3,000 gallons of water per minute from the Rio Grande aquifer system. Water samples were collected at the study well, at two other nearby public-supply wells, and at monitoring wells installed in or near the sAuthorsMartha L. Jagucki, Laura M. Bexfield, Charles E. Heywood, Sandra M. EbertsSimulation of Groundwater Flow in the Coastal Plain Aquifer System of Virginia
The groundwater model documented in this report simulates the transient evolution of water levels in the aquifers and confining units of the Virginia Coastal Plain and adjacent portions of Maryland and North Carolina since 1890. Groundwater withdrawals have lowered water levels in Virginia Coastal Plain aquifers and have resulted in drawdown in the Potomac aquifer exceeding 200 feet in some areas.AuthorsCharles E. Heywood, Jason P. PopeSummary of extensometric measurements in El Paso, Texas
Two counter-weighted-pipe borehole extensometers were installed on the left bank of the Rio Grande between El Paso, Texas, and Ciudad Juarez, Chihuahua, Mexico, in 1992. A shallow extensometer measures vertical compaction in the 6- to 100-meter aquifer-system depth interval. A deep extensometer measures vertical compaction in the 6- to 305-meter aquifer-system depth interval. Both extensometers arAuthorsCharles E. HeywoodSimulated ground-water flow in the Hueco Bolson, an alluvial-basin aquifer system near El Paso, Texas
The neighboring cities of El Paso, Texas, and Ciudad Juarez, Chihuahua, Mexico, have historically relied on ground-water withdrawals from the Hueco Bolson, an alluvial-aquifer system, to supply water to their growing populations. By 1996, ground-water drawdown exceeded 60 meters in some areas under Ciudad Juarez and El Paso. A simulation of steady-state and transient ground-water flow in the HuecoAuthorsCharles E. Heywood, Richard M. YagerChemistry and age of ground water in the southwestern Hueco Bolson, New Mexico and Texas
This report, prepared in cooperation with El Paso Water Utilities, presents the results of an investigation to determine the chemistry and age of ground water on the southwestern side of the Hueco Bolson. The radioactive isotope carbon-14 was used to estimate the length of time that water from wells has been isolated from the atmosphere, which is the modern carbon-14 reservoir. Nine wells on the sAuthorsScott K. Anderholm, Charles E. HeywoodGround displacements caused by aquifer-system water-level variations observed using interferometric synthetic aperture radar near Albuquerque, New Mexico
Six synthetic aperture radar (SAR) images were processed to form five unwrapped interferometric (InSAR) images of the greater metropolitan area in the Albuquerque Basin. Most interference patterns in the images were caused by range displacements resulting from changes in land-surface elevation. Loci of land- surface elevation changes correlate with changes in aquifer-system water leveAuthorsCharles E. Heywood, Devin L. Galloway, Sylvia V. Stork