DRI / DIRECTORY / JIM THOMAS
Jim Thomas Profile Photo
Dr. Jim Thomas
Research Professor Emeritus

Professional Interests

My general research interests include hydrogeology, water chemistry, age dating groundwaters, groundwater recharge and discharge processes, watershed hydrology and chemistry, evaluating water resources, and water resource potability and sustainability in developing countries. My research is primarily in three geographic areas: 1) northern Nevada watersheds, particularly the Lake Tahoe and Walker Lake watersheds; 2) southern and eastern Nevada; and 3) West Africa.

Research Interests

Lake Tahoe

Lake Tahoe clarity has been declining about 1 foot per year since the first clarity measurements in the late 1960s. A major effort of my research has been providing decision makers and regulators with information to set policy on how best to restore Lake Tahoe clarity. This research includes nutrient and fine sediment loading to the lake from surface-water runoff and groundwater inflow to the lake. Research projects include evaluating the effectiveness of best management practices (BMPs), including both natural and engineered structures to remove fine sediment and nutrients from surface-water runoff. These studies also include (1) the evaluation of land use on runoff and the associated fine sediment and nutrient concentrations; (2) phosphorus adsorption on sediments beneath settling basins; (3) determining the source of fine sediments in watersheds with surface water flow into the lake.

Walker Lake

My research in the Walker Lake basin focuses on the hydrology of the Walker Lake watershed including determining the hydrologic and dissolved salt budgets of Walker Lake. My research projects have also focused on groundwater flow to Walker Lake and groundwater flow and nutrient loading to Bridgeport Reservoir in the Walker Lake watershed. The Walker Lake basin is a unique internally drained watershed in the Great Basin of the western United States. The lake has no outlet, so the lake depends solely on surface water and groundwater inflow to maintain a hydrologic balance. Thus, the total dissolved salt (TDS) concentration of the lake depends on the amount of salt entering the lake from surface water and groundwater inflow and atmospheric deposition on the lake surface and the volume of water in the lake. Diversions of surface water in valleys upstream of Walker Lake for irrigation, beginning with the Bodie, California gold rush in the 1860s when water was diverted to grow vegetables and beef for the nearby remote mining community, have resulted in the level of Walker Lake to steadily declined. The current volume of Walker Lake is about 80 percent of its volume in the 1800s. This dramatic reduction in lake volume has resulted in the lake salinity, TDS, increasing from about 2500 mg/l to 15,000 mg/l.

Southern and Eastern Nevada

My research in southern and eastern Nevada has focused on regional groundwater flow system sources, travel times, and water budgets. The Death Valley flow system in southern Nevada and the White River flow system in eastern and southeastern Nevada encompass numerous valleys and hundreds of square miles with groundwater flowing beneath topographic divides and discharging at regional springs. Understanding the sources and amounts of groundwater in these regional flow systems and the time it takes groundwater recharged in mountainous recharge areas to flow to regional spring discharge areas is extremely important for water resource management in Nevada. Additionally, understanding the time involved in the potential radionuclide migration.

West Africa

My research in West Africa has involved developing water supplies for rural villages in Ghana, Mali, and Niger. Rural villagers often lack a potable source of drinking water and non-potable sources of water often disappear during the dry season. Hand pumps are installed for village water supplies when successful wells are drilled. Developing reliable water supplies in rural villages also requires that the water is safe to drink. Water quality is a very important part of this project because high fluoride concentrations are often observed in the groundwater in these West Africa countries. This high fluoride, along with other trace elements such as arsenic, need to be treated to ensure that safe drinking water is being supplied to the villagers. Bacterial testing is also important to identify any wells with groundwater that is being contaminated from land surface sources so that the problem can be fixed.

Education

Degree Institution Area
Ph.D. University of Nevada, Reno Hydrology / Hydrogeology
M.S. Indiana University, Bloomington Geology
B.S. University of Vermont, Burlington Geology

Academic Affiliations

Keywords

hydrogeology, geochemistry, water quality, isotopes, international research, water resource assessment

 

Publications
2022
Chapman, J. B., Thomas, J. M., Garner, C. B. (2022). Groundwater Recharge Timing Based on 14C and 2H within Indian Wells Valley, California, USA, Applied Geochemistry, Elsevier, March 11, 2022, https://doi.org/10.1016/j.apgeochem.2022.105268

2021
Thomas, J. M., Hershey, R. L., Fereday, W. H., Burr, G. (2021). Using carbon-14 of dissolved organic carbon to determine groundwater age and travel times I aquifers with low organic carbon., Applied Geochemistry, 124, Elsevier

2017
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, 10.1016/j.proeps.2016.12.065

Craig, L., Thomas, J. M., Lutz, A. D., Decker, D. L. (2017). Determining the optimum locations for pumping low-fluoride groundwater to distribute to communities in a fluoridic area in the Upper East Region, Ghana, Chemical Geology, 476, 481-492, December 1, 2017, https://doi.org/10.1016/j.chemgeo.2017.12.001

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, Elsevier, 10.1016/j.apgeochem.2016.05.017

Hershey, R. L., Fereday, W. H., Thomas, J. M. (2016). Dissolved Organic Carbon 14C in Southern Nevada Groundwater and Implications for Groundwater Travel Times (45268), Desert Research Institute Publication No. 45268

2015
Golden, P., Heyvaert, A. C., Thomas, J. M., Edwards, R. (2015). IPC Payette Basin Silver Sampling, Final Report

Holt, S. E., Lutz, A. D., Saga, B., Berger, D. L., Thomas, J. M., Apambire, W. B. (2015). Developing an approach for a three-dimensional hydrogeologic framework to find water in Northern Ghana, Open Journal of Modern Hydrology, 5, 105-120, http://dx.doi.org/10.4236/ojmh.2015.54010

Jasoni, R. L., Healey, J. M., Thomas, J. M. (2015). Data Report: Testing Leaf Clip Technology at TPC Summerlin Golf Course, DRI Report No. 41260

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

Craig, L., Stillings, L. L., Decker, D. L., Thomas, J. M. (2015). Corrigendum to “Comparing activated alumina with indigenous laterite and bauxite as potential sorbents for removing fluoride from drinking water in Ghana”, Applied Geochemistry, 63, 451

Craig, L., Stillings, L. L., Decker, D. L., Thomas, J. M. (2015). Comparing activated alumina with indigenous laterite and bauxite as potential sorbents for removing fluoride from drinking water in Ghana, Applied Geochemistry, 56, 50-66, 10.1016/j.apgeochem.2015.02.004 Published: MAY 2015

Lutz, A. D., Minyila, S., Saga, B., Diarra, S., Apambire, W. B., Thomas, J. M. (2015). Fluctuation of Groundwater Levels and Recharge Patterns in Northern Ghana, Climate, 3, 1-15, 10.3390/cli3010001

2014
Abatzoglou, J. T., Hegewisch, K., Carroll, R. W., Lutz, A. D., Leising, J. F., Rajagopal, S., Brooks, K., Thomas, J. M. (2014). Impacts of a Changing Climate on Water Resources in the Eastern Great Basin, DRI, DRI Report No. 41266

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
Mensing, S. A., Sharpe, S. E., Tunno, I., Sada, D. W., Starrat, S., Smith, J., Thomas, J. M. (2013). The late Holocene dry period: multiproxy evidence for an extended drought during 2800 and 1850 cal yr BP across the central Great Basin, USA, Quaternary Science Reviews, 78, 266-282

Lutz, A. D., Thomas, J. M., Diarra, S. (2013). Chemistry of Hand-Pump Waters in Ghana, Mali, and Niger, West Africa: Potential Health Effects, Procedia Earth and Planetary Science, 7, 541-545

Lutz, A. D., Diarra, S., Thomas, J. M., Ayamsegna, J. (2013). Drinking Water from Hand-Pumps in Mali, Niger, and Ghana, West Africa: Review of Health Effects, Journal of Water Resource and Protection, 5 (8A)

Leonard, A., Castle, S., Burr, G. S., Lange, T., Thomas, J. M. (2013). A Wet Oxidation Method for AMS Radiocarbon Analysis of Dissolved Organic Carbon in Groundwater, Radiocarbon, 55, 545-552

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

2012
Abatzoglou, J. T., Diehl, H., Leising, J. F., Lutz, A. D., Redmond, K. T., Thomas, J. M. (2012). Evaluation of Climate Change Effects on Water Resources in Eastern Nevada: Prepared by Desert Research Institute, Reno, NV for Southern Nevada Water Authority, DRI Publication Number: 41255

2011
Bisiaux, M. M., Edwards, R., Heyvaert, A. C., Thomas, J. M., Fitzgerald, B. C., Susfalk, R. B., Schladow, S. G., Thaw, M. N. (2011). Stormwater and Fire as Sources of Black Carbon Nanoparticles to Lake Tahoe, Environmental Science and Technology, 45 (6), 2065-2071, 10.1021/es103819v

Thomas, J. M., Redmond, K. T., Lutz, A. D., Abatzoglou, J. T., Stone, M. C., McCurdy, G. D., Earman, S. B., Leising, J., Donovan, D. (2011). Preliminary Evaluation of Climate Change Effects on Water Resources in Eastern Nevada, DRI Report No. 41252

Thomas, J. M., Mihevc, T. M. (2011). Evaluation of Groundwater Origins, Flow Paths, and Ages in East-Central and Southeastern Nevada, DRI Report No. 41253

2010
Lutz, A. D., Thomas, J. M., Panorska, A. K. (2010). Environmental controls on stable isotope precipitation values over Mali and Niger, West Africa, Environmental Earth Sciences, 10.1007/s12665-010-0655-7

2009
Lutz, A. D., Thomas, J. M., Pohll, G. M., Keita, M., McKay, W. A. (2009). Sustainability of ground water in Mali, West Africa, Environmental Geology, 58, 1441-1450, 10.1007/s00254-008-1646-9

Heyvaert, A. C., Reuter, J. E., Thomas, J. M. (2009). Water QualityWater Quality, In Comprehensive Science Plan for the Lake Tahoe Basin: Conceptual Framework and Research Strategies

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, NevadaContemporary Limnology of Walker Lake, Nevada, In Restoration of a Desert Lake in an Agriculturally Dominated Watershed: The Walker Lake Basin

2008
Coats, R., Larsen, M., Heyvaert, A. C., Thomas, J. M., Luck, M., Reuter, J. E. (2008). Nutrient and sediment production, watershed characteristics and land use in the Tahoe Basin, California-Nevada, Journal of the American Water Resources Association, 44, 754-770

2007
Bohm, B., Thomas, J. M., Dahan, O., Ralston, J., McKay, W. A. (2007). Ground water chemistry evolution under unsaturated zone sulfate salt dissolution in a Great Basin lacustrine aquifer, western United States, Journal of American Water Resources Association

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

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

Sharpe, S. E., Cablk, M. E., Thomas, J. M. (2007). The Walker Basin, Nevada and California: Physical Environment, Hydrology, and Biology

Patterson, G. L., Thomas, J. M. (2007). Carbon-14 groundwater analysis, Office of Science and Technology International, Annual Report

Mihevc, T. M., Thomas, J. M. (2007). Water chemistry, stable isotope, chlorofluorocarbon, and noble gas sampling and analyses of Arrow Creek Well #4

2006
Albright, W. H., Jasoni, R. L., Cablk, M. E., Thomas, J. M., Decker, D. L., Arnone, J.A. III (2006). Groundwater Evapotranspiration in Smoke Creek Desert, Nevada, Final Report to SEMPRA Generation, DRI Report #41224

2005
Winograd, I. J., Fridrich, C. J., Sweetkind, D., Belcher, W. R., Thomas, J. M. (2005). Comment on “Testing the interbasin flow hypothesis at Death Valley, California”, American Geophysical Union, EOS, 32, 86, 294-297

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

Deverel, S., Thomas, J. M., Decker, D. L., Earman, S. B., Mihevc, T. M., Acheampong, S. (2005). Groundwater evaporation estimates using stable isotope and chloride data, Yelland Playa, Spring Valley, Nevada

Thomas, J. M., Mihevc, T. M., Cooper, C. A., Gunter, M., Heyvaert, A. C., Michalski, G. (2005). Groundwater Nutrient Loading to Lake Tahoe in a Near-Shore Area with High Turbidity and Chlorophyll, DRI Report No. 41213

Rominger, D., Kozubowski, T., Panorska, A., Thomas, J. M. (2005). Antidegradation Water Quality Standards Analysis Project: Final Report, DRI Report No. 41214

Mihevc, T. M., Thomas, J. M., Cooper, C. A., Powell, R., Larson, J. (2005). Groundwater Nutrient Loading to Bridgeport Reservoir, DRI Report No. 41215

Deverel, S., Thomas, J. M., Decker, D. L., Earman, S. B., Mihevc, T. M., Acheampong, S. (2005). Groundwater Evaporation Estimates Using Stable Isotope and Chloride Data, Yelland Playa, Spring Valley, Nevada, DRI Report No. 41219

Lutz, A. D., Thomas, J. M. (2005). West Africa Water Initiative: Water Chemistry Field Method Manual, Release 1.1, DRI Report No. 41222

2004
Dahan, O., McGraw, D. S., Adara, E., Pohll, G. M., Bohm, B., Thomas, J. M. (2004). Multi-variable mixing cell model as a calibration and validation tool for hydrogeologic groundwater modeling, Journal of Hydrology, 293, 115-136

Mihevc, T. M., Thomas, J. M., Gunter, M. (2004). Evaluation of Urban Runoff BMP Effectiveness Through Assessment of Mechanical Treatment Technologies and Wetland Systems Employed at the Stateline Stormwater Project, DRI Report No. 41204

2003
Thomas, J. M., Albright, W. H. (2003). Estimated Groundwater Recharge to Dry Valley, Northeastern Nevada, Using the Chloride Mass Balance Method, DRI Report No. 41191

2001
Thomas, J. M., Calhoun, S., Apambire, W. B. (2001). A Deuterium Mass-Balance Interpretation of Groundwater Sources and Flows in Southeastern Nevada, DRI Report No. 41169

Pohll, G. M., McGraw, D. S., Ralson, J., Bohm, B., Thomas, J. M., McKay, W. A., Widmer, M., Minor, T. B., Lamorey, G., Dahan, O., Carroll, R. W., Cupp, K., Jacobson, E., McDonald, E. V., Stevick, E., Huntington, J. L. (2001). Evaluation of Groundwater and Solute Transport in the Fernley-Wadsworth Area, DRI Report No. 41173

Conference Proceedings
2019
Thomas, J. M., Hershey, R. L., Farnham, I. (2019). Using Dissolved Organic Carbon 14C to Calculate Groundwater Travel Times in Southern Nevada, Devils Hole Workshop 2019: Death Valley, California, May 1, 2019-May 3, 2019

2017
Singletary, L., Pohll, G. M., Thomas, J. M. (2017). Adapting to Earlier Snowmelt through Reservoir Reoperation, SISC: Bologna, Italy

Garner, C. B., Pohll, G. M., Thomas, J. M. (2017). Assessing the Impacts of Climate Change on a Highly Managed Terminal Lake Basin, SISC: Bologna, Italy

Pohll, G. M., Thomas, J. M. (2017). Assessing the Impacts of Climate Change on a Groundwater System in a Snow-Dominated Watershed, SISC: Bologna, Italy

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

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

2015
Sada, D. W., Thomas, J. M. (2015). Aquifer provenance, flow pathways, landscape setting and BMI community relationships in Great Basin and Mojave Desert springs, Nevada Water Resources Association Conference: Reno, NV, December 9, 2015-December 11, 2015

2014
Holt, S. E., Lutz, A. D., Berger, D., Saga, B., Boi-Addo, K., Apambire, W. B., Thomas, J. M. (2014). Developing a Three-dimensional hydrogeologic Framework for Water Management in Northern Ghana, West Africa, AWRA 2014 Summer Specialty Conference INTEGRATED WATER RESOURCES MANAGEMENT:: Reno, NV, June 30, 2014-July 2, 2014

2013
Lutz, A. D., Thomas, J. M., Diarra, S. (2013). Chemistry of Hand-Pump Waters in Ghana, Mali, and Niger, West Africa: Potential Health Effects, The Fourteenth International Symposium on Water-Rock Interaction: Avignon, France, June 9, 2013-June 14, 2013

Lutz, A. D., Apambire, W. B., Thomas, J. M. (2013). Estimating water storage in Northern Ghana, University of Oklahoma International WaTER Conference: Norman, OK, September 23, 2013-September 25, 2013

Apambire, W. B., Thomas, J. M., Lutz, A. D. (2013). The Desert Research Institute’s WASH Capacity Building Efforts over the last 20 years in West Africa, University of Oklahoma International WaTER Conference: Norman, OK, September 23, 2013-September 25, 2013

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

2012
Heyvaert, A. C., Caldwell, T. G., Nover, D. M., Towbridge, W., Schladow, G., Reuter, J. E., Thomas, J. M. (2012). Characterization of Fine Suspended Particulates in Tahoe Basin Stormwater, 2012 Tahoe Science Conference: Incline Village, NV, May 22, 2012-May 24, 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

2011
Lutz, A. D., Thomas, J. M., Abatzoglou, J. T., Diehl, H. (2011). Analysis of Observational Data: Hydroclimate Trends at Sites in Eastern Nevad, American Water Resources Association, Annual Water Resources Conference: Albuquerque, New Mexico, November 7, 2011-November 10, 2011

2009
Heyvaert, A. C., Lutz, A. D., Memmott, J. C., Thomas, J. M., Stone, M. C. (2009). Development and application of a limnological database and ecological model for Walker Lake in western Nevada, USA., International Symposium on Terminus Lakes: Reno, Nevada

Lutz, A. D., Thomas, J. M., Keita, M., McKay, W. A. (2009). Ground Water Level Monitoring in Mali and Ghana, West Africa – Ground Water Management Under Climate Change: Implications for Developing Countries, National Ground Water Association, Ground Water Summit: Tucson, New Mexico, April 22, 2009-April 22, 2009

2008
TrembathReichert, E., Mailoux, B., Stute, M., VanGeen, A., Freyer, G., Zheng, Y., O’Mullan, G., Foster, R., Thomas, J. M., Buccholz, B. (2008). 14C analysis of microbial DNA from Bangladesh groundwater: Implications for deep aquifer sustainability, Geological Society of America: Houston, Texas

2007
Sawyer, F. E., Thomas, J. M., Earman, S. B., Carroll, R. W. (2007). Coupled mixing-cell and mass balance flowpath models of the Whiter River Flow System, Nevada, National Ground Water Association 2007 Ground Water Summit: Albuquerque

Carroll, R. W., Thomas, J. M., Sharpe, S. E. (2007). Water rights purchases using the current Walker Lake Total Dissolved Solid (TDS) model., Truckee River Symposium Headwaters to Terminus and Western U.S. Terminal Lakes: Research Needs for Policy Decisions: Reno, NV

Lutz, A. D., Thomas, J. M., Pohll, G. M., Keita, M., Apambire, W. B., McKay, W. A. (2007). Ground Water Resource Sustainability in the Bani Area of Mali: Albuquerque, New Mexico

Lutz, A. D., Thomas, J. M., Apambire, W. B., Keita, M., McKay, W. A. (2007). Groundwater Resource Sustainability in Mali, National Ground Water Association Groundwater Summit: Albuquerque, New Mexico, April 29, 2007-May 3, 2007

2006
Patterson, G. L., Thomas, J. M. (2006). Carbon-14 groundwater analysis: Lawrence Berkley Laboratories

Goddard, K., Welch, A., Thomas, J. M. (2006). BARCASS: An integrated, multi-agency hydrogeologic study of east-central Nevada: Mesquite, Nevada

Sawyer, F. E., Thomas, J. M., Earman, S. B. (2006). A coupled mixing-cell and geochemical flow path model of the White River flow system, Nevada, USA, National Ground Water Association 2006 National Ground Water Summit

Bohm, B., Thomas, J. M., Dahan, O., Ralston, J., McKay, W. A. (2006). Ground water chemistry evolution under unsaturated zone sulfate salt dissolution in a Great Basin lacustrine aquifer, western United States: San Francisco, CA

Sawyer, F. E., Thomas, J. M., Earman, S. B., Carroll, R. W. (2006). Coupled mixing-cell and mass balance flow path models of the White River flow system, Nevada, American Geophysical Union Fall Meeting: San Francisco

Sawyer, F. E., Thomas, J. M., Earman, S. B. (2006). Coupled Mixing-Cell and Mass Balance Flow Path Models of the White River Flow System, Nevada, USA

Lundmark, K., Pohll, G. M., Carroll, R. W., Thomas, J. M. (2006). Regional Water Budget Accounting and Uncertainty Analysis Using a Deuterium-Calibrated Discrete State Compartment Model: White Pine County, Nevada, and Adjacent Areas in Nevada and Utah: San Francisco, CA

2005
Patterson, G. L., Thomas, J. M. (2005). Carbon-14 groundwater analysis, 183-185: Lawrence Berkeley Laboratory

Acheampong, S. Y., Thomas, J. M., Cooper, C. A. (2005). Estimation of circulation depths of some low temperature thermal springs in east-central Nevada: Reno, NV

Thomas, J. M., Deverel, S., Decker, D. L., Earman, S. B., Mihevc, T. M., Acheampong, S. Y. (2005). Groundwater Evaporation From a Playa in Spring Valley, Nevada, H33G-08, American Geophysical Union Fall Meeting: San Francisco

Lutz, A. D., Thomas, J. M., Apambire, W. B., Ayamsegna, J. A., McKay, W. A. (2005). Groundwater resource sustainability in the Nabogo Basin of Northern Ghana: San Antonio, Texas

Lutz, A. D., Thomas, J. M., Apambire, W. B., Ayamsegna, J., McKay, W. A. (2005). Groundwater resource sustainability in a small watershed in northern Ghana, National Groundwater Association: San Antonio, TX

2004
Jones, T., Thomas, J. M., French, R. H., Mihevc, T. M. (2004). Evaluation of effectiveness of three types of highway alignment BMPs for sediment and nutrient control: Crystal Bay, Lake Tahoe