Dr. Ron Hershey

Associate Research Scientist Hydrogeology
526f6e2e48657273686579406472692e656475
775-673-7393
hydrogeology, geochemistry, isotopes, isotope hydrology, carbon-14, groundwater age, water-rock reaction, pit lake

Professional Interests

Dr. Hershey has extensive experience in ground-water sampling, ground-water monitoring network design and evaluation, and the use of aqueous thermodynamic geochemical models including PHREEQE, WATEQ, and NETPATH. Other research interests include the use of environmental isotopes and aqueous geochemistry in hydrogeologic studies of local and regional scale. He has used isotopic ratios of carbon to trace the movement of water through the hydrologic cycle and to delineate recharge zones in mountainous carbonate terrain. Dr. Hershey is also interested in the transport of radionuclides and hazardous materials in ground water.

Research Areas

  • Hydrology of the Unsaturated Zone
  • Contaminant Transport
  • Hydrogeological Controls on Availability and Quality of Ground Water
  • Global Environmental Hydrology
  • Integrated Watershed System

Education

DegreeInstitutionArea
Ph.D. University of Nevada, Reno Hydrogeology
M.S. University of Nevada, Las Vegas Hydrogeology
B.S. University of New Mexico, Albuquerque Geology
B.A. Drake University, Des Moines Journalism

Publications & Presentations

2018

Heintz, K. M., Healey, J. M., Hershey, R. L., Pohlmann, K. F. (2018). Letter Report: Well Evaluation of UE-12t-6
Hershey, R. L. (2018). Assessment of Tritium Activities in Bailed versus Pumped Samples from Wells at the Nevada National Security Site, Desert Research Institute, 45285

2017

Kruger, B. R., Moser, D. P., Hershey, R. L. (2017). Constraining the age of water in Southern Nevada aquifers: Investigating microbial controls on radiocarbon signatures of dissolved organic carbon.
Kruger, B. R., Moser, D. P., Hershey, R. L. (2017). Constraining the age of water in Southern Nevada aquifers: Investigating microbial controls on radiocarbon signatures of dissolved organic carbon, Devils Hole Workshop: Beatty, NV, May 2017.
Pohlmann, K. F., Healey, J. M., Lyles, B. F., Cooper, C. A., Hershey, R. L. (2017). Hydrophysical Evaluation of Wells TW-B, TW-7, UE-6d, U-2gg PSE 3A, U-10L 1, and UE-6e in Yucca Flat, Desert Research Institute Publication No. 45274
Thomas, J. M., Pohll, G. M., Chapman, J. B., Pohlmann, K. F., Parashar, R., Rybarski, S. C., Hershey, R. L., Fereday, W. H. (2017). Hydraulic fracturing in the upper Humboldt River basin, Nevada, USA. 15th Water-Rock Interaction International Symposium, WRI-15, Procedia Earth and Planetary Science, 17, 189-192, doi: 10.1016/j.proeps.2016.12.065

2016

Eissa, M. A., Thomas, J. M., Pohll, G. M., Shouakar-Stash, O., Hershey, R. L., Dawoud, M. (2016). Groundwater recharge and salinization in the arid coastal plain aquifer of the Wadi Watir Delta, Sinai, Egypt, Applied Geochemistry, 71, 48-62, doi: 10.1016/j.apgeochem.2016.05.017 Elsevier
Hershey, R. L., Fereday, W. H. (2016). Laboratory Experiments to Evaluate Matrix Diffusion of Dissolved Organic Carbon Carbon-14 in southern Nevada Fractured-rock Aquifers, Desert Research Institute Publication No. 45266
Hershey, R. L., Fereday, W. H., Thomas, J. M. (2016). Dissolved Organic Carbon 14C in Southern Nevada Groundwater and Implications for Groundwater Travel Times, Desert Research Institute Publication No. 45268
Kruger, B. R., Werne, J. P., Branstator, D. K., Hrabik, T. R., Chikaraishi, Y., Ohkouchi, N., Hershey, R. L., Moser, D. P., Minor, E. C. (2016). Applying natural abundance radiocarbon analysis to understand ecosystem dynamics in surface and groundwater: Insights and precautions, American Society for Limnology and Oceanography (ASLO) Annual Meeting: Salt Lake City, UT, April 2016, Presented
McGraw, D. S., Hershey, R. L. (2016). Application of Monte Carlo Methods to Perform Uncertainty and Sensitivity Analysis on Inverse Water-Rock Reactions with NETPATH, Desert Research Institute Publication No. 45267
Moser, D. P., Willever, K. L., Fisher, J. C., Sackett, J. D., Kruger, B. R., Bruckner, J., Hershey, R. L., Fritsen, C. H., Memmott, J. C., Bloomquist, D. (2016). Linkages between limnology, biogeochemistry, and microbial communities of a threatened terminal lake ecosystem: Walker Lake, Nevada, USA, Terminus Lakes Workshop. University of Nevada Reno: Reno, NV, August 2016.
Pohll, G. M., Chapman, J. B., Pohlmann, K. F., Plume, R., Parashar, R., Rybarski, S. C., Hershey, R. L., Fereday, W. H., Reeves, M., Thomas, J. M. (2016). Assessment of the Migration Potential of Hydraulic Fracturing Fluids in Northeastern Nevada, American Water Resources Association: Anchorage, AK, April 25, 2016-April 27, 2016
Thomas, J. M., Hershey, R. L., Fereday, W. H. (2016). Using Dissolved Organic Carbon Isotopes for Groundwater Age Dating in Southern Nevada, USA, European Geosciences Union Annual Meeting: Vienna, Austria, April 17, 2016-April 22, 2016, EGU2016-5176

2015

Chapman, J. B., Cooper, C. A., Lyles, B. F., Hershey, R. L., Healey, J. M. (2015). Handbook: Collecting Groundwater Samples from Monitoring wells in Frenchman Flat, CAU 98, DOE/NV/0000939-23, Desert Research Institute Publication No. 45261
Kruger, B. R., Moser, D. P., Hershey, R. L. (2015). Constraining the age of water in Southern Nevada aquifers: Investigating microbial controls on radiocarbon signatures of dissolved organic carbon, Devils Hole Workshop: Ash Meadows National Wildlife Refuge, NV, May 7, 2015
Pohll, G. M., Chapman, J. B., Pohlmann, K. F., Plume, R. W., Parashar, R., Rybarski, S. C., Hershey, R. L., Fereday, W. H., Reeves, D. M., Thomas, J. M., Albright, W. H. (2015). Interim Final Report, Hydraulic Fracturing in the Upper Humboldt River Basin, Aquifer Quality Assessment Program, Desert Research Institute Publication No. 41263

2014

Eissa, M. A., Thomas, J. M., Hershey, R. L., Dawoud, M. I., Pohll, G. M., Dahab, K. A., Gomaa, M. A., Shabana, A. R. (2014). Geochemical and isotopic evolution of groundwater in the Wadi Watir Watershed, Sinai Peninsula, Egypt, Environmental Earth Sciences, 71, (4), 1855-1869, doi: 10.1007/s12665-013-2588-4 Springer-Verlag: New York
Hershey, R. L., Rybarski, S. C., Thomas, J. M., Pohll, G. M. (2014). Water-Quality Data, Hydraulic Fracturing in the Upper Humboldt River Basin, Aquifer Quality Assessment Program, Report 2, Desert Research Institute Publication No. 41259

2013

Cooper, C. A., Hershey, R. L., Healey, J. M., Lyles, B. F. (2013). Estimation of groundwater recharge at Pahute Mesa using the chloride mass-balance method, Desert Research Institute, Desert Research Institute Publication No. 45251
Eissa, M. A., Thomas, J. M., Pohll, G. M., Hershey, R. L., Dahab, K., Dawoud, M., Gomaa, M., El Shiekh, A. (2013). Groundwater resource sustainability in the Wadi Watir Delta, Gulf of Aqaba, Hydrogeology Journal, 21, (8), 1833-1851, doi: 10.1007/s10040-013-1031-y Springer Berlin Heidelberg: Berlin Heidelberg
Hershey, R. L., Cablk, M. E., LeFebre, K., Fenstermaker, L.F., Decker, D. L. (2013). Water-Chemistry Evolution and Modeling of Radionuclide Sorption and Cation Exchange during Inundation of Frenchman Flat Playa, Desert Research Institute: Reno, NV, DOE/NA0000939-10; Desert Research Institute Publication No. 45252
Thomas, J. M., Moser, D. P., Fisher, J., Reihle, J. L., Wheatley, A. E., Hershey, R. L., Baldino, C., Weissenfluh, D. (2013). Using Water Chemistry, Isotopes and Microbiology to Evaluate Groundwater Sources, Flow Paths and Geochemical Reactions in the Death Valley Flow System, USA, WRI Conference: Grenoble, France, Invited talk, Presented
Thomas, J. M., Moser, D. P., Fisher, J., Reihle, J. L., Wheatley, A. E., Hershey, R. L., Baldino, C., Weissenfluh, D. (2013). Using water chemistry, isotopes and microbiology to evaluate groundwater sources, flow paths and geochemical reactions in the death valley flow system, USA, Procedia Earth and Planetary Science, 7, 842-845, Accepted

2012

Eissa, M. A., Thomas, J. M., Pohll, G. M., Houakar-Stash, O., Hershey, R. L., Dawoud, M. I., Dahab, K., Gomaa, M. A. (2012). Modeling groundwater recharge and seawater intrusion in the Quaternary coastal plain aquifer of the Wadi Watir Delta, Sinai, Egypt, The 22nd Annual Goldschmidt Conference: Montreal, June 24, 2012-June 29, 2012, Abstract 220cd, 590
Jasoni, R. L., Larsen, J. D., Lyles, B. F., Healey, J. M., Cooper, C. A., Hershey, R. L. (2012). Data Report: Meteorological and Evapotranspiration Data from Sagebrush and Pinyon Pine/Juniper Communities at Pahute Mesa, Nevada National Security Site, 2011-2012, Desert Research Institute Publication No. 45248

2011

LeFebre, K., Hershey, R. L., Decker, D. L. (2011). Evaluation of Radionuclide Mobilization and Redistribution during Playa Lake Formation on the Frenchman Flat Playa, Nevada Nuclear Security Site, 2011 Fall Meeting American Geophysical Union: San Francisco, CA, December 5, 2011-December 9, 2011, Abstract H41H-1162

2010

Eissa, M. A., Thomas, J. M., Dawoud, M. I., Pohll, G. M., Gomaa, M. A., Dahab, K. A., Hershey, R. L. (2010). Groundwater resource sustainability in Wadi Watir, Gulf of Aqaba, Sinai, Egypt, 10th International Conference on Development of Drylands, Cairo, Egypt, December 12-15, 2010
Hershey, R. L., Mizell, S. A., Earman, S. B. (2010). Chemical and physical characteristics of springs discharging from reigonal flow systems of the carbonate-rock province of the Great Basin, western United States, Hydrogeology Journal, 18, 1007-1026, doi: 10.1007/s10040-009-0571-7
Michalski, G. S., Earman, S. B., Dahman, C., Hershey, R. L., Mihevc, T. M. (2010). Multiple isotope forensics of nitrate in a wild horse poisoning incident, Forensic Science International, 198, 103-109

2009

Bruckner, J., Fisher, J., Fritsen, C. H., Memmott, J. C., Hershey, R. L., Heyvaert, A. C., Moser, D. P. (2009). Microbial communities of Walker Lake, NV: Bacterial diversity of an alkaline, moderately saline terminal lake, American Society for Microbiology: Philadelphia, PA
Carroll, R. W., Hershey, R. L., Pohll, G. M. (2009). An unconfined groundwater model of the Death Valley Regional flow system and a comparison to its confined predecessor, Journal of Hydrology, 373, 316-328
Fisher, J., Bruckner, J., Planer-Friedrich, B., Hershey, R. L., Moser, D. P. (2009). Arsenic biogeochemistry of Walker Lake, NV, Terminus Lakes Workshop: Reno, NV
Fisher, J., Bruckner, J., PlanerFriedrich, B., Hershey, R. L., Moser, D. P. (2009). Arsenic biogeochemistry of Walker Lake NV, Terminus Lakes Workshop: Reno, NV
Hershey, R. L., Lyles, B. F., Mihevc, T. M., Sharpe, S. E. (2009). Major-ion and trace-element chemistry of Walker River and Walker Lake, Nevada., In Restoration of a Desert Lake in an Agriculturally Dominated Watershed: The Walker Lake Basin
Heyvaert, A. C., Chandra, S., Fritsen, C. H., Hershey, R. L., Moser, D. P., Stone, M. C., Bruckner, J., Lutz, A. D., Memmot, J., Umek, J., Thomas, J. M. (2009). Contemporary Limnology of Walker Lake, Nevada, In Restoration of a Desert Lake in an Agriculturally Dominated Watershed: The Walker Lake Basin
Kwicklis, E. M., Rose, T. P., Farnham, I. M., Hershey, R. L., Paces, J. B. (2009). Evaluation of groundwater mixing, flow paths and travel times at the Nevada Test Site using geochemical and isotopic tracers, Geological Society of America
Stone, M. C., Heyvaert, A. C., Chandler, C., Fritsen, C. H., Hershey, R. L., Moser, D. P., Bruckner, J., Lutz, A. D., Memmott, J. C., Acharya, K. (2009). Ecological model for Walker Lake, Nevada., In Restoration of a Desert Lake in an Agriculturally Dominated Watershed: The Walker Lake Basin

2008

Bruckner, J., Fritsen, C. H., Memmott, J. C., Hershey, R. L., Heyvaert, A. C., Moser, D. P. (2008). Microbial communities of a saline, alkaline terminal lake (Walker Lake, NV), American Society for Microbiology Annual Meeting: Boston, MA, June 2008, Poster No. N-116.
Carroll, R. W., Pohll, G. M., Earman, S. B., Hershey, R. L. (2008). A comparison of groundwater fluxes computed with MODFLOW and a mixing model using deuterium: application to the eastern Nevada Test Site and vicinity, Journal of Hydrology, 361, 371-385, doi: 10.1016/j.jhydrol.2008.08.005
Earman, S. B., Hershey, R. L., Michalski, G., Dahman, C., Mihevc, T. M. (2008). Evaluation of chemical data from samples collected February 2008 at the Cactus Flat Main Lake depression and surrounding area, Nevada Test and Training Range, Desert Research Institute Publication No. 41244, Revision 1.0.
Hershey, R. L., Paces, J. B., Singleton, M. J., Kwicklis, E. M., Decker, D. L., Fryer, W. M., Earman, S. B. (2008). Geochemical and isotopic evaluation of groundwater movement in Corrective Action Unit 99: Rainier Mesa and Shoshone Mountain, Nevada Test Site, Desert Research Institute Publication No. 45229
Michalski, G., Dahman, C., Earman, S. B., Hershey, R. L. (2008). Mutiple isotope forensics on nitrate in the poisoning of wild horses in 2007, American Geophysical Union Fall Meeting
Mizell, S. A., Mihevc, T. M., Hershey, R. L. (2008). Field Reconnaissance and Chemistry Data for Selected Water Sources on the Nevada Test and Training Range, Desert Research Institute Publication No. 41247

2007

Carroll, R. W., Hershey, R. L., Pohll, G. M. (2007). Groundwater Model of the Death Valley Regional Flow System Using MODFLOW-SURFACT
Carroll, R. W., Pohll, G. M., Earman, S. B., Hershey, R. L. (2007). Global optimization of a deuterium calibrated, discrete-state compartment model (DSCM): Application to the eastern Nevada Test Site, Journal of Hydrology, 345, 237-253
Carroll, R. W., Pohll, G. M., Earman, S. B., Hershey, R. L. (2007). A comparison of groundwater fluxes computed with MODFLOW and a stable isotope mixing model: Application to the eastern Nevada Test Site and vicinity, H41E-0829, American Geophysical Union Fall Meeting: San Francisco
Decker, D. L., Earman, S. B., Hershey, R. L., Ryu, J., Garcia, E. S., Reimus, P. W. (2007). Reactive transport of 14C through a carbonate aquifer: Implications for contaminant migration, Geological Society of America Annual Meeting: Denver
Garcia, E. S., Reimus, P. W., Hershey, R. L., Decker, D. L., Earman, S. B. (2007). Laboratory experiments of carbon-14 uptake and release from calcite, The 233rd American Chemical Society National Meeting: Chicago
Hershey, R. L., Decker, D. L., Earman, S. B., Ryu, J., Reimus, P. W., Garcia, E. S. (2007). Laboratory experiments of carbon-14 uptake on calcite and dolomite, The 233rd American Chemical Society National Meeting: Chicago
Hershey, R. L., Heilweil, P., Gardner, P., Lyles, B. F., Earman, S. B., Thomas, J. M., Lundmar, K. W. (2007). Ground-water chemistry interpretations supporting the Basin and Range regional carbonate-rock aquifer system (BARCAS) study, eastern Nevada and western Utah
Hershey, R. L., Justet, L., Heilweil, V., Gardner, P., Lyles, B. F., Earman, S. B., Thomas, J. M., Lundmark, K. (2007). Water Chemistry and Ground-water Flowpath Delineation in the Basin and Range Regional Carbonate Aquifer System (BARCAS), Eastern Nevada and Western Utah, DRI Report No. 41230
Knochenmus, L. A., Laczniak, R. J., Moreo, M. T., Sweetkind, D. S., Wilson, J. W., Thomas, J. M., Justet, L., Hershey, R. L., Earman, S. B., Lyles, B. F., Lundmark, K. (2007). Ground-water conditions, in Welch, A. H., Bright, D. J., and Knochenmus, L. A., eds., Water resources of the Basin and Range carbonate-rock aquifer system, White Pine County, Nevada, and adjacent areas in Nevada and Utah, U. S. Geological Survey Scientific Investigations Report 2007-5261, 37-42
Laczniak, R. J., Flint, A. L., Moreo, M. T., Knochenmus, L. A., Lundmark, K., Pohll, G. M., Carroll, R. W., Smith, J. L., Welborn, T. L., Heilweil, V. M., Pavelko, M. T., Hershey, R. L., Thomas, J. M., Earman, S. B., Lyles, B. F. (2007). Ground-water budgets, in Welch, A. H., Bright, D. J., and Knochenmus, L. A., eds., Water resources of the Basin and Range carbonate-rock aquifer system, White Pine County, Nevada, and adjacent areas in Nevada and Utah, U. S. Geological Survey Scientific Investigations Report 2007-5261, 43-68
Thomas, J. M., Decker, D. L., Patterson, G. L., Peterman, Z. E., Mihevc, T. M., Larsen, J. D., Hershey, R. L. (2007). Yucca Mountain area saturated zone dissolved organic carbon isotopic data, Yucca Mountain Nevada System of Higher Education Final Report

2006

Carroll, R. W., Hershey, R. L., Pohll, G. M. (2006). Numerical simulation of groundwater withdrawal from proposed pumping near the southeastern Nevada Test Site
Gilliam, A. B., Carroll, R. W., Pohll, G. M., Hershey, R. L. (2006). Numerical simulation of groundwater withdrawal within the Mercury Valley administrative groundwater basin, Nevada

2005

Hershey, R. L., Decker, D. L. (2005). Coupling a discrete-state compartment model and a water-rock reaction model with application to a large-scale hydrologic system in southern Nevada
Hershey, R. L., Earman, S. B. (2005). Estimating groundwater recharge via a deuterium-calibrated discrete-state compartment model, H31C-1320, American Geophysical Union Fall Meeting: San Francisco
Hershey, R. L., Thomas, J. M., Rose, T. P., Paces, J. B., Farnham, I. M., Benedict, J. ,. (2005). Evaluation of groundwater movement in the Frenchman Flat CAU using geochemical and isotopic analysis

2004

Earman, S. B., Hershey, R. L. (2004). Water quality impacts from waste rock at a Carlin-type gold mine, Elko County, Nevada, Environmental Geology, 45, 8, 1043-1053

2003

Hershey, R. L., Papelis, C., Decker, D. L., Miller, G. C. (2003). Laboratory experiments of As(V) and As(III) sorption onto pit-lake sediments from three different orebody types

1995

Hershey, R. L., Mizell, S. A. (1995). Water Chemistry of Spring Discharge from the Carbonate-Rock Province of Nevada, and Death Valley, California. Project Report to the Las Vegas Valley Water District, 45, DRI Report No. 41140

Authors

Abstract

 

This website uses cookies
We use cookies to personalise content, provide social media features and  analyse our traffic. We also share information about your use of our site with our social media and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. You consent to our cookies if you continue to use our website. DRI Privacy Policy >>