C. Justin Mayers
Justin Mayers is a Hydrologist in the Information Management Unit.
Justin graduated in 2003 with a Masters in Hydrogeology from University of Nevada Reno. For more than 15 years, he has worked on a wide range of groundwater, and water quality projects that included deep vadose zone modeling, basin scale groundwater modeling, GIS analysis, client/server side programming and database development.
Professional Experience
2001 - Present: Hydrologist, U.S. Geological Survey, Nevada Water Science Center
Education and Certifications
M.S. in Hydrogeology, University of Nevada, Reno, 2003
B.S. in Dual Major: Geosciences and Computer Science, Hobart and William Smith Colleges, 1997
Science and Products
Budgets and chemical characterization of groundwater for the Diamond Valley flow system, central Nevada, 2011–12
The Diamond Valley flow system consists of six hydraulically connected hydrographic areas in central Nevada. The general down-gradient order of the areas are southern and northern Monitor Valleys, Antelope Valley, Kobeh Valley, Stevens Basin, and Diamond Valley. Groundwater flow in the Diamond Valley flow system terminates at a large playa in the northern part of Diamond Valley. Concerns relating
Authors
David L. Berger, C. Justin Mayers, C. Amanda Garcia, Susan G. Buto, Jena M. Huntington
On the conversion of tritium units to mass fractions for hydrologic applications
We develop a general equation for converting laboratory-reported tritium levels, expressed either as concentrations (tritium isotope number fractions) or mass-based specific activities, to mass fractions in aqueous systems. Assuming that all tritium is in the form of monotritiated water simplifies the derivation and is shown to be reasonable for most environmental settings encountered in practice.
Authors
David A. Stonestrom, Brian J. Andraski, Clay A. Cooper, Charles J. Mayers, Robert L. Michel
CRT--Cascade Routing Tool to define and visualize flow paths for grid-based watershed models
The U.S. Geological Survey Cascade Routing Tool (CRT) is a computer application for watershed models that include the coupled Groundwater and Surface-water FLOW model, GSFLOW, and the Precipitation-Runoff Modeling System (PRMS). CRT generates output to define cascading surface and shallow subsurface flow paths for grid-based model domains. CRT requires a land-surface elevation for each hydrologic
Authors
Wesley R. Henson, Rose L. Medina, C. Justin Mayers, Richard G. Niswonger, R.S. Regan
Assessing potential effects of changes in water use with a numerical groundwater-flow model of Carson Valley, Douglas County, Nevada, and Alpine County, California
Rapid growth and development within Carson Valley in Douglas County, Nevada, and Alpine County, California, has caused concern over the continued availability of groundwater, and whether the increased municipal demand could either impact the availability of water or result in decreased flow in the Carson River. Annual pumpage of groundwater has increased from less than 10,000 acre feet per year (a
Authors
Richard M. Yager, Douglas K. Maurer, C.J. Mayers
Micrometeorological, evapotranspiration, and soil-moisture data at the Amargosa Desert Research site in Nye County near Beatty, Nevada, 2006-11
This report describes micrometeorological, evapotranspiration, and soil-moisture data collected since 2006 at the Amargosa Desert Research Site adjacent to a low-level radio-active waste and hazardous chemical waste facility near Beatty, Nevada. Micrometeorological data include precipitation, solar radiation, net radiation, air temperature, relative humidity, saturated and ambient vapor pressure,
Authors
Jonathan M. Arthur, Michael J. Johnson, C. Justin Mayers, Brian J. Andraski
Portable chamber measurements of evapotranspiration at the Amargosa Desert Research Site near Beatty, Nye County, Nevada, 2003-06
Portable chamber measurements of evapotranspiration (ET) were made at the U.S. Geological Survey's Amargosa Desert Research Site in southern Nevada to help quantify component- and landscape-scale contributions to ET in an arid environment. Evapotranspiration data were collected approximately every 3 months from 2003 to 2006. Chamber measurements of ET were partitioned into bare-soil evaporation an
Authors
C. Amanda Garcia, Michael J. Johnson, Brian J. Andraski, Keith J. Halford, C. Justin Mayers
Analysis of Streamflow Trends, Ground-Water and Surface-Water Interactions, and Water Quality in the Upper Carson River Basin, Nevada and California
Changes in land and water use and increasing development of water resources in the Carson River basin may affect flow of the river and, in turn, affect downstream water users dependent on sustained river flows to Lahontan Reservoir. To address these concerns, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, Churchill County, and the Truckee-Carson Irrigation Dist
Authors
Douglas K. Maurer, Angela P. Paul, David L. Berger, C. Justin Mayers
Selected micrometeorological, soil-moisture, and evapotranspiration data at Amargosa Desert Research Site in Nye County near Beatty, Nevada, 2001-05
Selected micrometeorological and soil-moisture data were collected at the Amargosa Desert Research Site adjacent to a low-level radio-active waste and hazardous chemical waste facility near Beatty, Nevada, 2001-05. Evapotranspiration data were collected from February 2002 through the end of December 2005. Data were col-lected in support of ongoing research to improve the understanding of hydrologi
Authors
Michael J. Johnson, C. Justin Mayers, C. Amanda Garcia, Brian J. Andraski
Modeling tritium transport through a deep unsaturated zone in an arid environment
Understanding transport of tritium (3H) in unsaturated zones is critical to evaluating options for waste isolation. Tritium typically is a large component of low-level radioactive waste (LLRW). Studies at the U.S. Geological Survey's Amargosa Desert Research Site (ADRS) in Nevada investigate 3H transport from a closed LLRW facility. Two boreholes are 100 and 160 m from the nearest waste trench and
Authors
C.J. Mayers, Brian J. Andraski, C.A. Cooper, S.W. Wheatcraft, David A. Stonestrom, R. L. Michel
Simplified method for detecting tritium contamination in plants and soil
Cost-effective methods are needed to identify the presence and distribution of tritium near radioactive waste disposal and other contaminated sites. The objectives of this study were to (i) develop a simplified sample preparation method for determining tritium contamination in plants and (ii) determine if plant data could be used as an indicator of soil contamination. The method entailed collectio
Authors
Brian J. Andraski, Mark W. Sandstrom, R. L. Michel, J.C. Radyk, David A. Stonestrom, M. J. Johnson, C.J. Mayers
Selected micrometeorological and soil-moisture data at Amargosa Desert Research Site in Nye County near Beatty, Nevada, 1998-2000
Selected micrometeorological and soil-moisture data were collected at the Amargosa Desert Research Site adjacent to a low-level radioactive waste and hazardous chemical waste facility near Beatty, Nev., 1998-2000. Data were collected in support of ongoing research studies to improve the understanding of hydrologic and contaminant-transport processes in arid environments.
Micrometeorological da
Authors
Michael J. Johnson, Charles J. Mayers, Brian J. Andraski
Science and Products
Budgets and chemical characterization of groundwater for the Diamond Valley flow system, central Nevada, 2011–12
The Diamond Valley flow system consists of six hydraulically connected hydrographic areas in central Nevada. The general down-gradient order of the areas are southern and northern Monitor Valleys, Antelope Valley, Kobeh Valley, Stevens Basin, and Diamond Valley. Groundwater flow in the Diamond Valley flow system terminates at a large playa in the northern part of Diamond Valley. Concerns relating
Authors
David L. Berger, C. Justin Mayers, C. Amanda Garcia, Susan G. Buto, Jena M. Huntington
On the conversion of tritium units to mass fractions for hydrologic applications
We develop a general equation for converting laboratory-reported tritium levels, expressed either as concentrations (tritium isotope number fractions) or mass-based specific activities, to mass fractions in aqueous systems. Assuming that all tritium is in the form of monotritiated water simplifies the derivation and is shown to be reasonable for most environmental settings encountered in practice.
Authors
David A. Stonestrom, Brian J. Andraski, Clay A. Cooper, Charles J. Mayers, Robert L. Michel
CRT--Cascade Routing Tool to define and visualize flow paths for grid-based watershed models
The U.S. Geological Survey Cascade Routing Tool (CRT) is a computer application for watershed models that include the coupled Groundwater and Surface-water FLOW model, GSFLOW, and the Precipitation-Runoff Modeling System (PRMS). CRT generates output to define cascading surface and shallow subsurface flow paths for grid-based model domains. CRT requires a land-surface elevation for each hydrologic
Authors
Wesley R. Henson, Rose L. Medina, C. Justin Mayers, Richard G. Niswonger, R.S. Regan
Assessing potential effects of changes in water use with a numerical groundwater-flow model of Carson Valley, Douglas County, Nevada, and Alpine County, California
Rapid growth and development within Carson Valley in Douglas County, Nevada, and Alpine County, California, has caused concern over the continued availability of groundwater, and whether the increased municipal demand could either impact the availability of water or result in decreased flow in the Carson River. Annual pumpage of groundwater has increased from less than 10,000 acre feet per year (a
Authors
Richard M. Yager, Douglas K. Maurer, C.J. Mayers
Micrometeorological, evapotranspiration, and soil-moisture data at the Amargosa Desert Research site in Nye County near Beatty, Nevada, 2006-11
This report describes micrometeorological, evapotranspiration, and soil-moisture data collected since 2006 at the Amargosa Desert Research Site adjacent to a low-level radio-active waste and hazardous chemical waste facility near Beatty, Nevada. Micrometeorological data include precipitation, solar radiation, net radiation, air temperature, relative humidity, saturated and ambient vapor pressure,
Authors
Jonathan M. Arthur, Michael J. Johnson, C. Justin Mayers, Brian J. Andraski
Portable chamber measurements of evapotranspiration at the Amargosa Desert Research Site near Beatty, Nye County, Nevada, 2003-06
Portable chamber measurements of evapotranspiration (ET) were made at the U.S. Geological Survey's Amargosa Desert Research Site in southern Nevada to help quantify component- and landscape-scale contributions to ET in an arid environment. Evapotranspiration data were collected approximately every 3 months from 2003 to 2006. Chamber measurements of ET were partitioned into bare-soil evaporation an
Authors
C. Amanda Garcia, Michael J. Johnson, Brian J. Andraski, Keith J. Halford, C. Justin Mayers
Analysis of Streamflow Trends, Ground-Water and Surface-Water Interactions, and Water Quality in the Upper Carson River Basin, Nevada and California
Changes in land and water use and increasing development of water resources in the Carson River basin may affect flow of the river and, in turn, affect downstream water users dependent on sustained river flows to Lahontan Reservoir. To address these concerns, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, Churchill County, and the Truckee-Carson Irrigation Dist
Authors
Douglas K. Maurer, Angela P. Paul, David L. Berger, C. Justin Mayers
Selected micrometeorological, soil-moisture, and evapotranspiration data at Amargosa Desert Research Site in Nye County near Beatty, Nevada, 2001-05
Selected micrometeorological and soil-moisture data were collected at the Amargosa Desert Research Site adjacent to a low-level radio-active waste and hazardous chemical waste facility near Beatty, Nevada, 2001-05. Evapotranspiration data were collected from February 2002 through the end of December 2005. Data were col-lected in support of ongoing research to improve the understanding of hydrologi
Authors
Michael J. Johnson, C. Justin Mayers, C. Amanda Garcia, Brian J. Andraski
Modeling tritium transport through a deep unsaturated zone in an arid environment
Understanding transport of tritium (3H) in unsaturated zones is critical to evaluating options for waste isolation. Tritium typically is a large component of low-level radioactive waste (LLRW). Studies at the U.S. Geological Survey's Amargosa Desert Research Site (ADRS) in Nevada investigate 3H transport from a closed LLRW facility. Two boreholes are 100 and 160 m from the nearest waste trench and
Authors
C.J. Mayers, Brian J. Andraski, C.A. Cooper, S.W. Wheatcraft, David A. Stonestrom, R. L. Michel
Simplified method for detecting tritium contamination in plants and soil
Cost-effective methods are needed to identify the presence and distribution of tritium near radioactive waste disposal and other contaminated sites. The objectives of this study were to (i) develop a simplified sample preparation method for determining tritium contamination in plants and (ii) determine if plant data could be used as an indicator of soil contamination. The method entailed collectio
Authors
Brian J. Andraski, Mark W. Sandstrom, R. L. Michel, J.C. Radyk, David A. Stonestrom, M. J. Johnson, C.J. Mayers
Selected micrometeorological and soil-moisture data at Amargosa Desert Research Site in Nye County near Beatty, Nevada, 1998-2000
Selected micrometeorological and soil-moisture data were collected at the Amargosa Desert Research Site adjacent to a low-level radioactive waste and hazardous chemical waste facility near Beatty, Nev., 1998-2000. Data were collected in support of ongoing research studies to improve the understanding of hydrologic and contaminant-transport processes in arid environments.
Micrometeorological da
Authors
Michael J. Johnson, Charles J. Mayers, Brian J. Andraski