Jeff Pepin, PhD
Jeff is a Hydrologist at the Colorado Water Science Center.
He began his career at the USGS New Mexico Water Science Center in Albuquerque in 2016 where he worked until his move to the Colorado Water Science Center in 2021. His research focuses on water resource evaluation along with geothermal resource characterization by using hydrothermal modeling, geostatistics, electromagnetic geophysics, and machine learning. Additionally, he specializes in using heat as a groundwater tracer to evaluate groundwater/surface-water interactions. Jeff currently co-leads regional- and national-scale thermal energy storage assessments within the United States as part of the USGS Geothermal Resources Investigations Project. He is also a team member of the USGS Next Generation Water Observing System (NGWOS) Upper Colorado and Gunnison River Basin project.
Science and Products
Renewable Resilience: City-Scale Geothermal Energy Everywhere
Despite the proven efficacy of geothermal energy as a city-scale heating and cooling resource, the relative newness of most city-scale applications using diverse technologies has resulted in limited widespread adoption. We aim to develop authoritative information suitable for city-managers and other decision-makers. Geothermal resources are ubiquitous and diverse, with technologies available bot
Data supporting management of thermal springs –Steamboat Springs, Colorado
The U.S. Geological Survey (USGS), in cooperation with the city of Steamboat Springs and the Tread of Pioneers Museum, is undertaking a geologic, hydrologic, and geochemical study to better understand the sources of water to hot springs and the possible effects of land use change and human activities on the chemistry and sustainability of springs.
Geothermal Resource Investigations Project
Geothermal energy is a significant source of renewable electric power in the western United States and, with advances in exploration and development technologies, a potential source of a large fraction of baseload electric power for the entire country. This project focuses on advancing geothermal research through a better understanding of geothermal resources and the impacts of geothermal...
Next Generation Water Observing System: Upper Colorado River Basin
The Next Generation Water Observing System (NGWOS) provides high-fidelity, real-time data on water quantity, quality, and use to support modern prediction and decision-support systems that are necessary for informing water operations on a daily basis and decision-making during water emergencies. The headwaters of the Colorado and Gunnison River Basins provide an opportunity to implement NGWOS in a...
Assessment of the Groundwater Resources of the Plains of San Agustin, New Mexico
The groundwater resources of the Plains of San Agustin basin are largely undeveloped, though recent interest in pumping and exporting some of these resources to the Albuquerque metropolitan area has caused uneasiness among some water-resources managers and the public. Protest and concern regarding this appropriation of water resources have been expressed by private, Federal, State, and Tribal...
Transboundary Aquifer Assessment Program (TAAP)
Transboundary aquifers are an essential source of water for United States – Mexico border communities. Declining water levels, deteriorating water quality, and increasing use of groundwater resources on both sides of the border raise concerns about the long-term availability of this supply. The U.S. – Mexico Transboundary Aquifer Assessment Act (Public Law 109-448) of 2006 was enacted to conduct...
Science and Products
- Science
Renewable Resilience: City-Scale Geothermal Energy Everywhere
Despite the proven efficacy of geothermal energy as a city-scale heating and cooling resource, the relative newness of most city-scale applications using diverse technologies has resulted in limited widespread adoption. We aim to develop authoritative information suitable for city-managers and other decision-makers. Geothermal resources are ubiquitous and diverse, with technologies available botData supporting management of thermal springs –Steamboat Springs, Colorado
The U.S. Geological Survey (USGS), in cooperation with the city of Steamboat Springs and the Tread of Pioneers Museum, is undertaking a geologic, hydrologic, and geochemical study to better understand the sources of water to hot springs and the possible effects of land use change and human activities on the chemistry and sustainability of springs.Geothermal Resource Investigations Project
Geothermal energy is a significant source of renewable electric power in the western United States and, with advances in exploration and development technologies, a potential source of a large fraction of baseload electric power for the entire country. This project focuses on advancing geothermal research through a better understanding of geothermal resources and the impacts of geothermal...Next Generation Water Observing System: Upper Colorado River Basin
The Next Generation Water Observing System (NGWOS) provides high-fidelity, real-time data on water quantity, quality, and use to support modern prediction and decision-support systems that are necessary for informing water operations on a daily basis and decision-making during water emergencies. The headwaters of the Colorado and Gunnison River Basins provide an opportunity to implement NGWOS in a...Assessment of the Groundwater Resources of the Plains of San Agustin, New Mexico
The groundwater resources of the Plains of San Agustin basin are largely undeveloped, though recent interest in pumping and exporting some of these resources to the Albuquerque metropolitan area has caused uneasiness among some water-resources managers and the public. Protest and concern regarding this appropriation of water resources have been expressed by private, Federal, State, and Tribal...Transboundary Aquifer Assessment Program (TAAP)
Transboundary aquifers are an essential source of water for United States – Mexico border communities. Declining water levels, deteriorating water quality, and increasing use of groundwater resources on both sides of the border raise concerns about the long-term availability of this supply. The U.S. – Mexico Transboundary Aquifer Assessment Act (Public Law 109-448) of 2006 was enacted to conduct... - Data
- Publications