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Jeff Pepin, PhD

Jeff Pepin is a Hydrologist at the USGS Central Energy Resources Science Center.

Jeff’s research focuses on geothermal resource characterization and resource assessment methodology development. His research often utilizes hydrothermal modeling, geostatistics, electromagnetic geophysics, and machine learning. He is also experienced collecting thermal and hydrogeologic data in the field to support these research efforts. Jeff currently leads the national thermal energy storage assessment program as part of the USGS Geothermal Resources Investigations Project (GRIP). He began his career with the USGS in 2016.
 

Professional Experience

  • 2024 to present: Hydrologist, U.S. Geological Survey, Central Energy Resources Science Center, Denver, Colorado

  • 2022 to 2024: Hydrologist, U.S. Geological Survey, Colorado Water Science Center, Denver, Colorado

  • 2019 to 2022: Hydrologist, U.S. Geological Survey, New Mexico Water Science Center, Albuquerque, New Mexico

  • 2016 to 2019: Student Trainee Hydrology, U.S. Geological Survey, New Mexico Water Science Center, Albuquerque, New Mexico

  • 2012 to 2019: Research & Teaching Assistant, New Mexico Institute of Mining & Technology, Socorro, New Mexico

  • 2012 to 2012: Well-Logging Specialist, New Mexico Bureau of Geology and Mineral Resources, Socorro, New Mexico
     

Education and Certifications

  • Ph.D. in Earth & Environmental Science with specialization in Hydrology, New Mexico Institute of Mining & Technology, 2019

  • M.S. in Hydrology, New Mexico Institute of Mining & Technology, 2015

  • B.S. in Geology, California State Polytechnic University Pomona, 2011
     

Science and Products

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Filter Total Items: 13

Optimization assessment of a groundwater-level observation network in the Middle Rio Grande Basin, New Mexico Optimization assessment of a groundwater-level observation network in the Middle Rio Grande Basin, New Mexico

The U.S. Geological Survey, in cooperation with the Albuquerque Bernalillo County Water Utility Authority (ABCWUA), measures groundwater levels continuously (hourly) and discretely (semiannually and annually) at a network of wells and piezometers (hereafter called the observation network) within the Middle Rio Grande Basin in central New Mexico. Groundwater levels that are measured in...
Authors
Andre B. Ritchie, Jeffrey D. Pepin
By
Water Resources Mission Area, New Mexico Water Science Center

Non-USGS Publications**

Pepin J (2018) New Approaches to Geothermal Resource Exploration and Characterization. PhD Dissertation, New Mexico Institute of Mining & Technology, 186 p.
Pepin J, Person M, Phillips F, Kelley S, Timmons S, Owens L, Witcher J, Gable C (2017) Deep Fluid Circulation within Crystalline Basement Rocks and the Role of Hydrologic Windows in the Formation of the Truth or Consequences, New Mexico Low-Temperature Geothermal System. In Crustal Permeability, John Wiley & Sons, Ltd., United Kingdom, 560 p.
Zhang Y, Edel S, Pepin J, Person M, Broadhead R, Ortiz JP, Bilek S, Mozley P, Evans J (2016) Exploring the Potential Linkages Between Oil-Field Brine Reinjection, Crystalline Basement Permeability, and Triggered Seismicity for the Dagger Draw Oil Field, Southeastern New Mexico, USA Using Hydrologic Modeling. Geofluids, 16, 971-987.
Kelley S, Person M, Kelley R, Pepin J (2016) Low-temperature geothermal resources in the Acoma Basin and Lucero Uplift, eastern Cibola and western Valencia counties, New Mexico. In The Geology of the Belen Area, New Mexico Geological Society, Guidebook, 67th Field Conference, Socorro, New Mexico, 263-274.
Pepin J (2015) Sustainability Assessment of the Truth or Consequences, New Mexico Geothermal Resource. M.S. Thesis, New Mexico Institute of Mining & Technology, 87 p.
Bielicki J, Blackwell D, Harp D, Karra S, Kelley R, Kelley S, Middleton R, Pepin J, Person M, Sutula G, Witcher J (2015) Hydrogeologic Windows: Regional Signature Detection for Blind and Traditional Geothermal Play Fairways. Los Alamos National Laboratory Final Report LA-UR-15-28360, 94 p
Person M, Kelley S, Kelley R, Karra S, Harp D, Witcher J, Bielicki J, Sutula G, Middleton R, Pepin J (2015) Hydrogeologic Windows: Detection of Blind and Traditional Geothermal Play Fairways in Southwester New Mexico Using Conservative Element Concentrations and Advective-Diffusive Solute Transport. Geothermal Resource Council Transactions, 39, 751-759.
Pepin J, Person M, Phillips F, Kelley S, Timmons S, Owens L, Witcher J, Gable C (2015) Deep Fluid Circulation within Crystalline Basement Rocks and the Role of Hydrologic Windows in the Formation of the Truth or Consequences, New Mexico Low-Temperature Geothermal System. Geofluids, 15, 139-160.
Person M, Phillips F, Kelley S, Timmons S, Pepin J, Blom L, Haar K, Murphy M (2013) Assessment of the Sustainability of Geothermal Development Within the Truth or Consequences Hot Springs District, New Mexico. New Mexico Bureau of Geology and Mineral Resources Open-File Report 551, 65 p.
Pepin J (2011) Geology of Hawk Canyon, Anza-Borrego Desert State Park, California. B.S. Thesis, California State Polytechnic University Pomona, 59 p.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Science and Products

No Result Found
Filter Total Items: 13

Optimization assessment of a groundwater-level observation network in the Middle Rio Grande Basin, New Mexico Optimization assessment of a groundwater-level observation network in the Middle Rio Grande Basin, New Mexico

The U.S. Geological Survey, in cooperation with the Albuquerque Bernalillo County Water Utility Authority (ABCWUA), measures groundwater levels continuously (hourly) and discretely (semiannually and annually) at a network of wells and piezometers (hereafter called the observation network) within the Middle Rio Grande Basin in central New Mexico. Groundwater levels that are measured in...
Authors
Andre B. Ritchie, Jeffrey D. Pepin
By
Water Resources Mission Area, New Mexico Water Science Center

Non-USGS Publications**

Pepin J (2018) New Approaches to Geothermal Resource Exploration and Characterization. PhD Dissertation, New Mexico Institute of Mining & Technology, 186 p.
Pepin J, Person M, Phillips F, Kelley S, Timmons S, Owens L, Witcher J, Gable C (2017) Deep Fluid Circulation within Crystalline Basement Rocks and the Role of Hydrologic Windows in the Formation of the Truth or Consequences, New Mexico Low-Temperature Geothermal System. In Crustal Permeability, John Wiley & Sons, Ltd., United Kingdom, 560 p.
Zhang Y, Edel S, Pepin J, Person M, Broadhead R, Ortiz JP, Bilek S, Mozley P, Evans J (2016) Exploring the Potential Linkages Between Oil-Field Brine Reinjection, Crystalline Basement Permeability, and Triggered Seismicity for the Dagger Draw Oil Field, Southeastern New Mexico, USA Using Hydrologic Modeling. Geofluids, 16, 971-987.
Kelley S, Person M, Kelley R, Pepin J (2016) Low-temperature geothermal resources in the Acoma Basin and Lucero Uplift, eastern Cibola and western Valencia counties, New Mexico. In The Geology of the Belen Area, New Mexico Geological Society, Guidebook, 67th Field Conference, Socorro, New Mexico, 263-274.
Pepin J (2015) Sustainability Assessment of the Truth or Consequences, New Mexico Geothermal Resource. M.S. Thesis, New Mexico Institute of Mining & Technology, 87 p.
Bielicki J, Blackwell D, Harp D, Karra S, Kelley R, Kelley S, Middleton R, Pepin J, Person M, Sutula G, Witcher J (2015) Hydrogeologic Windows: Regional Signature Detection for Blind and Traditional Geothermal Play Fairways. Los Alamos National Laboratory Final Report LA-UR-15-28360, 94 p
Person M, Kelley S, Kelley R, Karra S, Harp D, Witcher J, Bielicki J, Sutula G, Middleton R, Pepin J (2015) Hydrogeologic Windows: Detection of Blind and Traditional Geothermal Play Fairways in Southwester New Mexico Using Conservative Element Concentrations and Advective-Diffusive Solute Transport. Geothermal Resource Council Transactions, 39, 751-759.
Pepin J, Person M, Phillips F, Kelley S, Timmons S, Owens L, Witcher J, Gable C (2015) Deep Fluid Circulation within Crystalline Basement Rocks and the Role of Hydrologic Windows in the Formation of the Truth or Consequences, New Mexico Low-Temperature Geothermal System. Geofluids, 15, 139-160.
Person M, Phillips F, Kelley S, Timmons S, Pepin J, Blom L, Haar K, Murphy M (2013) Assessment of the Sustainability of Geothermal Development Within the Truth or Consequences Hot Springs District, New Mexico. New Mexico Bureau of Geology and Mineral Resources Open-File Report 551, 65 p.
Pepin J (2011) Geology of Hawk Canyon, Anza-Borrego Desert State Park, California. B.S. Thesis, California State Polytechnic University Pomona, 59 p.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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