Leonard F. KonikowLeonard F. Konikow, Ph.D.

Leonard “Lenny” F. Konikow, Ph.D., is a renowned hydrogeologist, having worked for the U.S. Geological Survey for more than 40 years and serving as the project chief of its Water Resources Division’s National Research Program from 1980-2013.

Konikow continues his research at USGS as an emeritus scientist. He studies groundwater depletion and developed one of the first widely used generic solute transport models for groundwater. His research has a long history of publication in Groundwater®.

As a long-time member of NGWA, Konikow has served on the Scientists and Engineers Section Board of Directors. He was the recipient of NGWA’s M. King Hubbert Award for major scientific contributions to the understanding of groundwater in 1989 and NGWA’s Life Member Award in 2013.

In 2001, Konikow received the President’s Award from the International Association of Hydrogeologists; in 2011, he was elected Fellow to the American Geophysical Union; and he was elected to the National Academy of Engineering in 2015.

Konikow has previously served as associate editor and advisor to the editor for Groundwater.


Executive editors

Charles Andrews, Ph.D., PG
S.S. Papadopulos & Associates Inc.

Charles AndrewsCharles Andrews, Ph.D., PG, is a senior principal at S.S. Papadopulos & Associates Inc. in Rockville, Maryland, and a visiting professor at the Southern University of Science and Technology in Shenzhen, Guangdong, China. He is a long-time member of NGWA, having served on the Scientists and Engineers Section Board of Directors and as an associate editor of Groundwater (2002-2021), as well as assisting in the organization of several Theis Conferences. He has worked as a groundwater consultant for more than 40 years on a wide variety of groundwater projects in North America, China, and Africa.

He received his B.A. in geology from Carleton College and his Ph.D. in geology from the University of Wisconsin-Madison.

Ty Ferre, Ph.D.
University of Arizona

Ty FerreTy Ferre, Ph.D., is a distinguished professor in the department of hydrology and atmospheric sciences at the University of Arizona.

He teaches courses in subsurface hydrology, hydrogeologic field methods, groundwater modeling, and decision-making. His research interests include improved extraction of information from indirect (geophysical) observations for hydrogeologic applications, the design of monitoring networks, and the development of groundwater models to improve water-resources decision-making.

He was the 2016 Darcy Lecturer, delivering a talk entitled “Seeing Things Differently: Rethinking the Relationships Between Data, Models, and Decision-Making.”

He received his B.Eng. in geophysical engineering from the Colorado School of Mines and his Ph.D. in Earth sciences from the University of Waterloo.

Yu-Feng Forrest Lin, Ph.D.
University of Illinois at Urbana-Champaign

linYu-Feng Forrest Lin, Ph.D. is a hydrogeologist at the Illinois State Geological Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign and previously served as associate editor (2011-2016) and technology editor (2014-2016) for Groundwater.

His current research interests include groundwater and surface water interactions, hydrogeological effects on geothermal exchange, environmental impacts associated with geologic carbon sequestration, and numerical modeling for groundwater flow systems.

He is a licensed professional geoscientist and certified geographic information systems professional. He is also a clinical professor in the department of civil and environmental engineering and a research professor in the department of natural resources and environmental sciences at the University of Illinois at Urbana-Champaign.

Lin received his B.S. in water resources and environmental engineering from Tamkang University in Taiwan, his M.S. in civil and environmental engineering from the University of Connecticut, and his Ph.D. in geological engineering from the University of Wisconsin-Madison.

Chen Zhu, Ph.D.
Indiana University

Chen ZhuChen Zhu, Ph.D., is a professor of earth and atmospheric sciences, and an adjunct professor in the School of Public and Environmental Affairs and School of Public Health at Indiana University. He served as an associate editor for Groundwater on two occasions (2003-05 and 2021-22), was the 2006 recipient of NGWA’s John Hem Award for Excellence in Science & Engineering, and was The Groundwater Foundation’s Darcy Distinguished Lecturer in 2021-2022.

Zhu specializes in hydrogeochemistry and has worked on topics from groundwater contamination by uranium, arsenic, and mine tailings, using isotopic tracers to deduce groundwater recharge, and reactive transport modeling to storing CO2 in deep aquifers. His book with Greg Anderson, Environmental Applications of Geochemical Modeling, is used as a textbook at universities around the world.

Zhu has been elected a fellow of the American Association for the Advancement of Science, the Mineralogical Society of America, and the Geological Society of America.

He holds a Ph.D. from the Johns Hopkins University, an M.S. from the University of Toronto, and a B.S. from Chengdu College of Geology.

Advisors to the editor-in-chief

Hendrik M. Haitjema, Ph.D.
Professor Emeritus Indiana University

Franklin W. Schwartz, Ph.D.
Ohio State University

Allen M. Shapiro, Ph.D.
U.S. Geological Survey

Book editor

Alan E. Fryar 
University of Kentucky 
Lexington, Kentucky

History editor

David Deming
University of Oklahoma
Norman, Oklahoma

Discussion editor

Stephen R. Kraemer, Ph.D.
U.S. EPA, Office of Research and Development

Technology editor

Chris Lowry, Ph.D.
University of Buffalo
Buffalo, New York

Media Spotlight editors

Jeeban Panthi
University of Rhode Island
Kingston, Rhode Island

Rachel Spinti
Montgomery & Associates
Tucson, Arizona

Associate editors

Mark Bakker, Ph.D.
Delft University of Technology

Michael J. Barden
Hydro Geo Chem Inc.
Tucson, Arizona

Steffan Birk, Ph.D.
University of Graz

Andrea E. Brookfield
University of Waterloo

Claudius M. Bürger, Ph.D.
Shell Global Solutions International B.V.

Daniel K. Burnell, Ph.D.
Tetra Tech
Chantilly, Virginia

James R. Craig, Ph.D., P.Eng.
University of Waterloo

Frederick D. Day-Lewis, Ph.D.
Pacific Northwest National Laboratory
Richland, Washington

Mindy L. Erickson, Ph.D., PE
U.S. Geological Survey, Upper Midwest Science Center
Mounds View, Minnesota

Grant Ferguson, Ph.D.
St. Francis Xavier University

Michael N. Fienen, Ph.D.
U.S. Geological Survey, Wisconsin Water Science Center
Middleton, Wisconsin

Michael J. Gefell, PG, CPG
Anchor QEA LLC
Lakewood, Colorado

Chris Gellasch, Ph.D.
Eastern Michigan University
Ypsilanti, Michigan

Nico Goldscheider, Ph.D. 
Karlsruhe Institute of Technology 
Karlsruhe, Germany

Daren C. Gooddy, Ph.D.
British Geological Survey
United Kingdom

Weixing Guo, Ph.D.
Groundwater Tek Inc.
Naples, Florida

Zhilin Guo, Ph.D.
Southern University of Science and Technology
Shenzhen, China

John H. Guswa, Ph.D.
JG Environmental Inc.
Boxborough, Massachusetts

Landon Halloran, Ph.D.
University of Neuchâtel
Neuchâtel, Switzerland

David John Hart
Wisconsin Geological and Natural History Survey
Madison, Wisconsin​

Ellen Herman, Ph.D.
Bucknell University
Lewisburg, Pennsylvania

Randy J. Hunt Ph.D.
U.S. Geological Survey

Dylan Irvine, Ph.D.
Charles Darwin University

Tim Johnson, Ph.D.
Pacific Northwest National Laboratory
Richland, Washington

M. Wojciech Kawecki, Ph.D.
Saudi Aramco
Groundwater Division
Saudi Arabia

Jeff Kennedy, Ph.D.
U.S. Geological Survey
Flagstaff, Arizona

Eve L. Kuniansky, PE 
U.S. Geological Survey 

Christian Langevin, Ph.D.
U.S. Geological Survey
Minneapolis, Minnesota

Melissa E. Lenczewski, Ph.D.
Northern Illinois University
DeKalb, Illinois

Norman Levine, Ph.D.
College of Charleston
Charleston, South Carolina

David S. Lipson, Ph.D.
HRS Water Consultants Inc. 
Lakewood, Colorado

Ganming Liu, Ph.D.
Bowling Green State University 
Bowling Green, Ohio​

Bettina Longino, Ph.D.
Clifton Park, New York

Robert G. Maliva, Ph.D.
Fort Myers, Florida

Costantino Masciopinto
Water Research Institute

John E. McCray, Ph.D.
Colorado School of Mines 
Golden, Colorado​

Steffen Mehl, Ph.D.
California State University, Chico
Chico, California

June E. Mirecki, Ph.D., PG&
U.S. Army Corps of Engineers
Jacksonville, Florida

Louis Motz, Ph.D.
University Of Florida
Gainesville, Florida

Maureen Muldoon, Ph.D.
Wisconsin Geological and Natural History Survey
Madison, Wisconsin

Francisco Munoz-Arriola, Ph.D.
University of Nebraska-Lincoln
Lincoln, Nebraska

Jean-Philippe Nicot, Ph.D.
Bureau of Economic Geology, University of Texas in Austin
Austin, Texas

Andrew M. O’Reilly, Ph.D.
USDA — Agricultural Research Service
Oxford, Mississippi

Frederick L. Paillet, Ph.D.
University of Arkansas
Fayetteville, Arkansas

Tom Perina, Ph.D., PG, CHG
CB&I Federal Services
Irvine, California

Jerome Perrin, Ph.D. 
Orléans, France​

Alden Provost, Ph.D.
U.S. Geological Survey
Reston, Virginia

Rachel Rotz, Ph.D.
Florida Gulf Coast University
Fort Myers, Florida

Christopher J. Russoniello, Ph.D.
University of Rhode Island
Kingston, Rhode Island

Gregory Schnaar, Ph.D.
Daniel B. Stephens & Associates Inc. 
Goleta, California 

Martin H. Schroth, Ph.D.
ETH Zurich
Institute of Biogeochemistry and Pollutant Dynamics

Marcia Schulmeister, Ph.D., PG
University of Kansas
Lawrence, Kansas

Craig T. Simmons, Ph.D.
Flinders University

Paul Stackelberg
U.S. Geological Survey
Water Resources Mission Area, Troy, New York

Randy Stotler, Ph.D.
University of Waterloo

Nicole T. Sweetland, Ph.D., PG
Daniel B. Stephens & Associates Inc.
Goleta, California

Steve Thornton, Ph.D. 
University of Sheffield 
United Kingdom 

Frank T.C. Tsai, Ph.D., PE 
Louisiana State University 
Baton Rouge, Louisiana

Guangcai Wang, Ph.D.
China University of Geosciences, Beijing
Beijing, China

Lichun Wang, Ph.D.
Tianjin University

Quanrong Wang, Ph.D.
China University of Geosciences

Jeremy White, Ph.D.
Intera Inc.
Boulder, Colorado

Tianfang Xu, Ph.D.
Arizona State University
Tempe, Arizona

Jianwen Yang, Ph.D.
University of Windsor

Ming Ye, Ph.D.
Florida State University
Tallahassee, Florida

Willem Jan Zaadnoordijk
Delft University of Technology

Jim Zhang, Ph.D., PE
Oakland, California

Yong Zhang
University of Alabama 
Tuscaloosa, Alabama

Junfeng Zhu, Ph.D.
University of Kentucky​

Vitaly Zlotnik, Ph.D.
University of Nebraska-Lincoln
Lincoln, Nebraska