| Halford, K.J., 2024, Challenges of Managing Water Resources with Numerical Flow Models, 2024 Devils Hole workshop, Longstreet, Nevada, April 25 PRESENTED |
| Halford, K.J., 2024, Potential Recharge for Groundwater-flow Models in Northeast Nevada From Stage-Latitude Precipitation Distribution, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, February 1 PRESENTED |
| Halford, K.J., 2024, Groundwater Simulation for NEPA – Broad Possibilities, Not Exact Predictions, 2024 NEPA Symposium, Las Vegas, Nevada, January 30 PRESENTED |
| Halford, K.J., 2023, Historical Evolution of Conceptual Models of Furnace Creek Discharge, 2023 Devils Hole workshop, Longstreet, Nevada, April 26 PRESENTED |
| Halford, K.J. and Erica Gallegos, 2023, Mapping Contours of Pre-Mining, Water Levels to a Water-Table Surface, Nevada Water Resources Association Annual Conference, Reno, Nevada, January 26 PRESENTED |
| Halford, K.J., 2022, Challenges of Managing Water Resources with Numerical Flow Models, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, February 2 PRESENTED |
| Halford, K.J., 2021, Historical Evolution of Conceptual Models of Furnace Creek Discharge, Reno, Nevada, January 26 PRESENTED |
| Halford, K.J., 2020, Panel: Springs in Nevada 2: Managing and Understanding Impacts to Springs, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, February 12 INVITED |
| Halford, K.J., 2020, Maxey-Eakin Approach for Local Flow Constraints, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, February 13 PRESENTED |
| Zhan, J. and K.J. Halford, 2020, Pit Lake Iterative Simulation Model (PLISM): A Pit Lake Iterative, Analytical Solution, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, February 13 PRESENTED |
| Halford, K.J., 2019, Look Beyond the Objective Function for Reasonable Models, Nevada Water Resources Association Mine Water Management Symposium, Reno, Nevada, January 28-29 |
| Halford, K.J., 2018, Effects of Local and Regional Pumping on Water Levels in Devils Hole, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, March 1 PRESENTED |
| Halford, K J, 2017, Complex Models Require Looking and Comparing, MODFLOW and More 2017: Modeling for Sustainability and Adaptation – International Groundwater Modeling Conference, May 21 – 24, 2017 |
| Jackson, T.R. and K.J. Halford, 2017, Evaluating Potential Groundwater Pumping Effects in Pahrump Valley on 38 Water Resources in the Amargosa Wild and Scenic River, Nevada and California, MODFLOW and More 2017: Modeling for Sustainability and Adaptation – International Groundwater Modeling Conference, May 21 – 24, 2017 |
| Jackson, T.R., K.J. Halford, and P. Gardner, 2017, Evaluating Micrometeorological Estimates of Groundwater Discharge from Great Basin Desert Playas, Abstract H12B-01 at 2017 Fall Meeting, AGU, New Orleans, La., 11 Dec. PRESENTED |
| Halford, K.J., T.R. Jackson, and Joe Fenelon, 2017, Differentiating Natural and Anthropogenic Groundwater-Level Changes in Critical Habitats: An Example from Devils Hole, Nevada, Abstract H53O-02 at 2017 Fall Meeting, AGU, New Orleans, La., 15 Dec. PRESENTED |
| Halford, K.J., 2017, Confirming Connection between AFFCR and Ash Meadows Groundwater Basins, presented at 2017 Devils Hole workshop, Beatty, Nevada, 2 May PRESENTED |
| Halford, K.J., 2016, Estimating Hydraulic Properties with Stress-Specific Groundwater Models, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, March 1-3 PRESENTED |
| Jackson, T.R. and K.J. Halford, 2016, Effects of Amargosa Desert Groundwater Withdrawals on Discharge at Furnace Creek Springs, Southern Nevada, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, March 1-3 PRESENTED |
| Halford, K J, 2016, Increase Model Certainty with Transmissivity Observations, NGWA Groundwater Summit, Denver, CO, April 27 PRESENTED https://ngwa.confex.com/ngwa/2016gws/webprogram/Paper10888.html |
| Halford, K.J. and Joe Fenelon, 2016, Detecting Distant Drawdowns with Water-Level Modeling, U.S. Geological Survey – National Ground-Water Meeting, Reno, Nevada, August 31, 2016, PRESENTED |
| Halford, K.J., 2016, Estimating Hydraulic Properties with Stress-Specific Groundwater Models, U.S. Geological Survey – National Ground-Water Meeting, Reno, Nevada, August 29 – September 2, 2016, PRESENTED |
| Halford, Keith, Peter Godfrey, and Noel Ludwig, 2015, Quick Answers with Groundwater Models, Nevada Water Resources Association Annual Conference, Reno, Nevada, January 28-31 PRESENTED |
| Garcia, C.A., Jena Huntington, K.J. Halford, and M.T. Moreo, 2015, Estimating Groundwater Discharge from Two Great Basin Playas: A Minor Groundwater Resource, Nevada Water Resources Association Annual Conference, Reno, Nevada, January 28-31 PRESENTED |
| Jackson, T.R., K.J. Halford, and C.A. Garcia, 2015, Estimating Groundwater Discharge from Playas with Variable-Density Simulations, Nevada Water Resources Association Annual Conference, Reno, Nevada, January 28-31 PRESENTED |
| Halford, K J, 2015, Increase Model Certainty with Transmissivity Observations, NGWA Groundwater Summit, San Antonio, TX, March 16 PRESENTED https://ngwa.confex.com/ngwa/2015gws/webprogram/Paper10275.html |
| Garcia, C.A., Jena Huntington, and K.J. Halford, 2015, Estimating Groundwater Discharge from Two Great Basin Playas: A Minor Groundwater Resource, NGWA Groundwater Summit, San Antonio, TX, March 18 PRESENTED https://ngwa.confex.com/ngwa/2015gws/webprogram/Paper10301.html |
| Jackson, T.R., C.A. Garcia, K.J. Halford, and Jena Huntington, 2015, Estimating Groundwater Discharge from Playas with Variable-Density Simulations, NGWA Groundwater Summit, San Antonio, TX, March 16 PRESENTED https://ngwa.confex.com/ngwa/2015gws/webprogram/Paper10240.html |
| Halford, K.J. and Joe Fenelon, 2015, Delineating Groundwater Basins in the Great Basin, the Pahute Mesa–Oasis Valley example, presented at 2015 Devils Hole workshop, Ash Meadows National Wildlife Refuge Visitors Center, Amargosa Valley, Nevada, 6-8 May PRESENTED |
| Jackson, T.R., K.J. Halford, and C.A. Garcia, 2015, Estimating Groundwater Discharge from Playas with Variable-Density Simulations, presented at 2015 Devils Hole workshop, Ash Meadows National Wildlife Refuge Visitors Center, Amargosa Valley, Nevada, 6-8 May PRESENTED |
| Halford, K J, 2015, Increase Model Certainty with Transmissivity Observations, MODFLOW and More 2015: Modeling a Complex World – International Groundwater Modeling Conference, May 31-June 3 |
| Halford, Keith, 2014, Improving Groundwater Models with Transmissivity Observations, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, February 4-6 PRESENTED |
| Halford, Keith, 2014, Improving Groundwater Models with Transmissivity Observations, presented at 2014 Devils Hole workshop, Furnace Creek, Calif., Thursday, May 1 PRESENTED |
| Halford, K.J. and Joe Fenelon, 2014, Detecting Distant Drawdowns with Water-Level Modeling, NGWA Groundwater Summit, Denver, CO, May 7 PRESENTED |
| Jackson, T.R., C.A. Garcia, K.J. Halford, Nancy Damar, J.M. Fenelon, 2014, Integrated Analysis of 10 Large-Scale Multi-Well Aquifer Tests at Pahute Mesa, presented at DOE Technical Information Exchange, Las Vegas, Nevada, July 16 PRESENTED |
| Jackson, T.R., C.A. Garcia, K.J. Halford, Donald Sweetkind, J.M. Fenelon, 2014, Improving Regional Groundwater Models with Transmissivity Observations, presented at DOE Technical Information Exchange, Las Vegas, Nevada, July 16 PRESENTED |
| Jackson, T.R., K.J. Halford, and C.A. Garcia, 2014, Quantifying Hydraulic Properties and Connections between Structural Blocks at Pahute Mesa, Nevada National Security Site, Abstract H53B-0858 at 2014 Fall Meeting, AGU, San Francisco, Calif., 19 Dec. PRESENTED |
| Halford, Keith, 2013, Reporting Flow Model Results for Groundwater Development, Nevada Water Resources Association Annual Conference, Reno, Nevada, January 28-31 PRESENTED |
| Halford, Keith, 2013, Detecting Distant Drawdowns with Water-Level Modeling, 2013 Ground Water Summit, San Antonio, TX, April 28 – May 2 SEQUESTERED despite reimbursable funds |
| Halford, K J, 2013, Essential Reporting for Comprehending Groundwater Models, presented at 2013 Devils Hole workshop, Furnace Creek, Calif., 1-3 May PRESENTED |
| Mirus, B B, K J Halford, D S Sweetkind, and J M Fenelon, 2013, Testing the Hydrologic Utility of Geologic Frameworks at Pahute Mesa, presented at 2013 Devils Hole workshop, Furnace Creek, Calif., 1-3 May PRESENTED |
| Halford, K J, 2013, Increase Certainty with Transmissivity Observations, MODFLOW and More 2013: Translating Science into Practice – International Groundwater Modeling Conference, June 2 – 5 SEQUESTERED despite reimbursable funds |
| Halford, K J, 2013, Using and Reporting Groundwater Models, American Bar Association Meeting 31st Annual Water Law Conference, June 6, Las Vegas, NV INVITED |
| Halford, K J, 2013, Aquifer Characterization and Simulation of Well Modification with AnalyzeHOLE, The 7th Symposium in GRA’s Series on Tools and Technologies “High Resolution Tools and Techniques for Optimizing Groundwater Extraction for Water Supply” Symposium, June 19, Garden Grove, CA INVITED |
| Halford, K J and Fenelon, J M, 2013, Detecting Distant Drawdowns with Water-Level Modeling, 29th Biennial Groundwater Conference & 22nd GRA Annual Meeting October 8-9, Sacramento, CA FURLOGHED |
| Halford, K J and Fenelon, J M, 2013, Detecting Effects of Distant Groundwater Development, Abstract 265-4, Geological Society of America Abstracts with Programs, Vol. 45, No. 7, p. 490 PRESENTED |
| Halford, K J, 2013, Improving Regional Groundwater Models with Transmissivity Observations, Abstract H11H-1246 at 2013 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec. PRESENTED |
| Halford, K J and Fenelon, J M, 2012, Detecting Effects of Distant Groundwater Development, presented at 2012 Devils Hole workshop, Furnace Creek, Calif., 2-3 May PRESENTED |
| Fenelon, J M and Halford, K J, 2012, Detecting Distant Drawdown in Amargosa Desert From Pumping at Yucca Flat, Nevada National Security Site, presented at 2012 Devils Hole workshop, Furnace Creek, Calif., 2-3 May PRESENTED |
| Halford, K.J., 2012, Multiple, Simple Groundwater Models Maximize Results, U.S. Geological Survey – National Ground-Water Meeting, Lakewood, Colorado, August 6-10, 2012, PRESENTED |
| Halford, K J, Fenelon, J M, Garcia, C, and Sweetkind, D S, 2012, Testing Hydrologic Utility of Geologic Frameworks, U.S. Geological Survey – National Ground-Water Meeting, Lakewood, Colorado, August 6-10, 2012, PRESENTED |
| Halford, K.J., 2012, Testing Hydrologic Utility of Geologic Frameworks, Abstract 265-4, Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 617 PRESENTED |
| Halford, Keith, 2011, Effects of Groundwater Development—Not that Uncertain, Nevada Water Resources Association Annual Conference, Reno, Nevada, February 1-3 PRESENTED |
| Fienen, M. N., K. Halford, and D. Hart. 2011, Integrated Interpretation of Borehole Flow, Aquifer-Test Results, and Spring Discharge—Culver Springs, Wisconsin. AWRA – Wisconsin Section Annual Meeting March 3-4. Appleton, WI. |
| Halford, Keith, 2011, Effects of Groundwater Development—Not that Uncertain, Ground Water Summit and 2011 Ground Water Protection Council Spring Meeting, Baltimore, MD, May 1-5 PRESENTED |
| Halford, K J, Fenelon, J M, Garcia, C, and Sweetkind, D S, 2011, Assessing Hydraulic Connections across Fault Structures, Pahute Mesa, Nevada, MODFLOW and More: Integrated Hydrologic Modeling – International Groundwater Modeling Conference, June 5-8 PRESENTED |
| Sweetkind, D S, Halford, K J, and Belcher, W B, 2011, Development and Use of Hydrostratigraphic Nomenclature in the Southwestern Nevada Volcanic Field, Nevada, Geological Society of America Abstracts with Programs, Vol. 43, No. 5 , p. 28 PRESENTED |
| Garcia, C, Halford, K J, and Fenelon, J M, 2011, Detecting Distant Drawdowns with Theis Transforms, Abstract H13A-1175 at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec. PRESENTED |
| Huntington, J, Halford, K J, and Garcia, C, 2011, Development of Saline Flow Systems in Closed Basins, Abstract H11E-1091 presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec. PRESENTED |
| Halford, K J, Sweetkind, D S, Fenelon, J M, and Garcia, C, 2011, Geologic Frameworks and Faulty Hydrology, Abstract H13A-1165 at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec. PRESENTED |
| Halford, Keith, 2010, Directly Assessing Hydrologic Effects with Drawdown Models, Nevada Water Resources Association Annual Conference, Las Vegas, Nevada, March 2–4 PRESENTED |
| Johnson, Carole D., Day-Lewis, Frederick D., Paillet, Frederick L., Halford, Keith J., and Williams, John H., 2010, FLASH – A Program for Flow-Log Analysis of Single Holes, Abstract 273-7, Geological Society of America Abstracts with Programs, Vol. 42, No. 5 , p. 639 PRESENTED |
| Garcia, C, Fenelon, J M, Halford, K J, and Sweetkind, D S, 2010, Assessing Hydraulic Connections Across Structural Blocks, Pahute Mesa, Nevada—Detecting Distant Drawdowns, Abstract H13D-0989 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. PRESENTED |
| Halford, K J, Fenelon, J M, Garcia, C, and Sweetkind, D S, 2010, Assessing Hydraulic Connections Across Structural Blocks, Pahute Mesa, Nevada—Interpreting Hydraulic Properties, Abstract H13D-0988 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. PRESENTED |
| Halford, K.J., 2009, Directly Assessing Hydrologic Effects with Drawdown Models, NGWA Press, The 2009 Ground Water Summit—The Science and Engineering Conference: Adapting to Increasing Demands in a Changing Climate, April 19-23, 2009, Tucson, AZ, p. XX. PRESENTED. |
| Phelps, G., Boucher, A. and Halford, K., 2009, Using Nearest Neighbor, Sequential Indicator Simulation, and Single Normal Equation Simulation Interpolators to Calculate Bulk Hydraulic Conductivity within an Alluvial Fan: International Association for Mathematical Geosciences Annual Conference, Stanford University, California, 23-28 August. |
| Halford, Keith, 2009. Regularized Interpretation of Flow Logs with AnalyzeHOLE, 2009 PEST Conference, Potomac, Maryland, November 2–4 PRESENTED |
| Stamos, C.L., Nishikawa, T., Martin, P., Everett, R.R., and Halford, K.J., 2008, Identification of Sources and Management of Arsenic from Wells in Antelope Valley, CA, Western Region Water Science Symposium, Portland, OR, March 18-20, 2008, INVITED |
| Halford, K.J., 2008, AnalyzeHOLE, Interpreting Flow Logs with an Integrated Wellbore Analysis Tool, Western Region Water Science Symposium, Portland, OR, March 18-20, 2008, INVITED |
| Halford, K.J. and Stamos, C.L., 2008, AnalyzeHOLE, Interpreting Flow Logs with an Integrated Wellbore Analysis Tool, MODFLOW and More: Ground Water and Public Policy – International Groundwater Modeling Conference, May, 2008 PRESENTED |
| Halford, K.J., Garcia, C.A., and Laczniak, R J, 2008, Interpreting Flow Logs with an Integrated Wellbore Analysis Tool, AnalyzeHOLE, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract H32A-03 PRESENTED |
| Garcia, C.A., Halford, K.J., and Laczniak, R J, 2008, Determining Heterogeneity of Lithologic Units from Flow Logs and Aquifer Tests, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract H32A-04 PRESENTED |
| Halford, K.J., 2007, Aquifer test analysis utilizing numerical models and inverse methods, Abstract 40-4, Geological Society of America Abstracts with Programs, Vol. 39, No. 6, p. 110 PRESENTED |
| Halford, K.J., 2006, Interpreting hydrogeologic columns with multiple aquifer tests and a moving-model approach, MODFLOW and More 2006 – International Groundwater Modeling Conference, May, 2006 PRESENTED |
| Halford, K.J., 2006, Vertical leakance estimates using multiple aquifer tests and a moving-model approach, Abstract 2-12, Geological Society of America Abstracts with Programs, Vol. 38, No. 7, p. 18 PRESENTED |
| Halford, W.P., Halford, K.J., A.T. Pierce, J. DeSalvo, T.P. Foster, A. Kosinski, S.K. Weller, and B.M. Gebhardt. 2005. Interferon-b and IFN-g synergize to disrupt the productive cycle of herpes simplex virus type 1 replication. Experimental Biology, April 2 – 6, San Diego, CA. INVITED |
| Halford, W.P., Halford, K.J., A.T. Pierce, J. DeSalvo, T.P. Foster, A. Kosinski, S.K. Weller. 2005. Interferon-b and IFN-g synergize to disrupt the productive cycle of herpes simplex virus type 1 replication. 31st International Herpesvirus Workshop, July 29 – August 4, Turku, Finland. INVITED |
| Halford, K.J., 2005, Drawdown Estimation and Quantification of Error, EOS Trans. AGU, 86(52), Fall Meet. Suppl., Abstract H23I-05 PRESENTED |
| Halford, K.J., and Hanson, R.T., 2004, “Effects of simulating multi-node wells on model calibration, interpretation, and prediction results”, U.S. Geological Survey – National Ground-water Conference, June, 2004, INVITED |
| Halford, K.J., Laczniak, R J, and Galloway, D, 2004, Hydraulic Characterization using InSAR and Nuclear Devices, EOS, Transactions, AGU 2004 Fall Meeting, Vol. 85, No. 47, abstract H11C-0311 PRESENTED |
| Halford, K.J., and Hanson, R.T., 2003, Effects of simulating multi-node wells on model calibration, interpretation, and prediction results”, MODFLOW and More 2003 – International Groundwater Modeling Conference, September, 2003 INVITED |
| Halford, K. J., and Yobbi, D. K., 2003, Characterization of geohydrologic columns for aquifer storage and recovery: NGWA Press, AGWSE Annual Meeting and Conference Abstract Book, Orlando, FL, December 9-12, 2003, p. 25. PRESENTED |
| Halford, K.J. 2000, Problems Associated with Estimating the Connection Between Ground-Water Discharge and Stream-Discharge, GSA Abstracts with Programs, v. 32, no. 7., abstract 51118. PRESENTED |
| Halford, K.J. 2000, Ground-water recharge estimation in humid climates: Assessing the errors, USGS Western Region Technical and Management Meeting, November 13-17, 2000, Reno, Nevada. INVITED |
| Halford, K.J. 2000, Problems Associated with Estimating Ground-Water Discharge and Recharge from Stream-Discharge Records, EOS, Transactions, AGU 2000 Fall Meeting, Vol. 81, No. 48, abstract H61D-08 PRESENTED |
| Halford, K.J. 1998, Evaluating phytoremediation and recirculation wells at Orlando NTC, FL, USGS DODEC meeting, May 1998, Tampa, Florida |
| Halford, K.J. and J.E. Mirecki 1998, Transient expansion of a fresh-water aquifer in a reclaimed salt marsh near Mayport, Florida, EOS, Transactions, AGU 1998 Spring Meeting, abstract OS42B-10. PRESENTED |
| Halford, K.J. 1997, Limitations of the Rorabaugh/Daniel model for estimating recharge, Northeastern and Southeastern Regions Ground-Water Specialist Meeting, 1-28-97, Altamonte Springs, Florida |
| Halford, K.J. 1997, Transient expansion of a fresh-water aquifer at NAVSTA Mayport and regulatory implications, USGS DODEC meeting, May 1997, Charleston, South Carolina |
| Halford, K.J. 1997, Effects of steady-state assumption on hydraulic conductivity and recharge estimates in a surficial aquifer system, EOS, Transactions, AGU 1997 Spring Meeting, Vol. 78, No. 17, April 29, 1997 supplement, abstract H51C-9. PRESENTED |
| Halford, K.J. 1996, Effects of unsaturated zone on aquifer test analysis in a shallow-aquifer system, USGS DODEC meeting, May 1996, Colorado Springs, Colorado |
| Halford, K.J. 1995, Multi-aquifer testing in a surficial-aquifer system, northeast Florida, GSA abstracts with programs, Vol. 27, No. 6, Oct. 1995, abstract 25172. PRESENTED |
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