Andrew Warner

Thematic Area Lead, Water and Biogeochemical Cycles

Andrew Warner is the Director of the Penn State Water Initiative, Director of the Pennsylvania Water Resources Research Center, and an Affiliate Associate Research Professor in the Department of Ecosystem Science and Management. He has a 35-year career developing and implementing innovations in environmental, conservation, and multi-purpose water management projects, as well as in research, facilitation, teaching, and policy.  Warner has worked in the public, private, and non-profit sectors, including 16 years with The Nature Conservancy’s Global Freshwater Program, during which time he designed, launched and was TNC lead on the Sustainable Rivers Program.  This national partnership between TNC and the U.S. Army Corps of Engineers (USACE) continues to develop and advance innovation for changing dam operations to restore and protect ecosystems, while maintaining and enhancing other project benefits.  In 2016-2017, Warner was selected and served as a Senior Fellow at the USACE’s Institute for Water Resources. Through his work, he has helped to restore and conserve river, floodplain, wetland, and groundwater systems on more than 70 projects across the United States, Asia, Africa, and Latin America, and has advanced related innovations in technical solutions, methods and tools, and policy.

Warner’s research focuses on science and policy innovations related to the restoration of aquatic ecosystems, biodiversity conservation, ecosystem services, water management and climate resilience, water insecurity and human health, and the water-energy-food nexus.

In the News

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Recent Publications

Hydrologic classification of Tanzanian rivers to support national water resource policy

Olden, J. D., Messager, M. L., Tharme, R. E., Kashaigili, J. J., Munkyala, D., Zielinski, L. & Warner, A., Jun 2021, In: Ecohydrology. 14, 4, e2282.

Research output: Contribution to journalArticlepeer-review

Informing environmental flow planning through landscape evolution modeling in heavily modified urban rivers in china

Wu, M., Wu, H., Warner, A. T., Li, H. & Liu, Z., Nov 1 2021, In: Water (Switzerland). 13, 22, 3244.

Research output: Contribution to journalArticlepeer-review

A three-level framework for assessing and implementing environmental flows

Opperman, J. J., Kendy, E., Tharme, R. E., Warner, A. T., Barrios, E. & Richter, B. D., Aug 8 2018, In: Frontiers in Environmental Science. 6, AUG, 76.

Research output: Contribution to journalReview articlepeer-review

HEC-RPT - Software for Facilitating Development of River Management Alternatives

Hickey, J. T., Newbold, S. J. & Warner, A. T., Mar 1 2015, In: River Research and Applications. 31, 3, p. 392-401 10 p.

Research output: Contribution to journalArticlepeer-review

Rétablir les débits environnementaux grâce à une gestion adaptative de réservoir: Planification, contexte scientifique, et mise en œuvre à travers le projet « Rivières durables »

Translated title of the contribution: Restoring environmental flows through adaptive reservoir management: Planning, science, and implementation through the Sustainable Rivers ProjectWarner, A. T., Bach, L. B. & Hickey, J. T., Apr 2014, In: Hydrological Sciences Journal. 59, 3-4, p. 770-785 16 p.

Research output: Contribution to journalArticlepeer-review

Evaluating dam re-operation for freshwater conservation in the sustainable rivers project

Konrad, C. P., Warner, A. & Higgins, J. V., Jul 2012, In: River Research and Applications. 28, 6, p. 777-792 16 p.

Research output: Contribution to journalArticlepeer-review

A Call to Enhance the Resiliency of the Nation's Water Management

Warner, A., Opperman, J. J. & Pietrowsky, R., Jul 5 2011, In: Journal of Water Resources Planning and Management. 137, 4, p. 305-308 4 p.

Research output: Contribution to journalEditorialpeer-review

The ecological limits of hydrologic alteration (ELOHA): A new framework for developing regional environmental flow standards

Poff, N. L., Richter, B. D., Arthington, A. H., Bunn, S. E., Naiman, R. J., Kendy, E., Acreman, M., Apse, C., Bledsoe, B. P., Freeman, M. C., Henriksen, J., Jacobson, R. B., Kennen, J. G., Merritt, D. M., O'Keeffe, J. H., Olden, J. D., Rogers, K., Tharme, R. E. & Warner, A., Jan 2010, In: Freshwater Biology. 55, 1, p. 147-170 24 p.

Research output: Contribution to journalArticlepeer-review

Ecosystem effects of environmental flows: Modelling and experimental floods in a dryland river

Shafroth, P. B., Wilcox, A. C., Lytle, D. A., Hickey, J. T., Andersen, D. C., Beauchamp, V. B., Hautzinger, A., McMullen, L. E. & Warner, A., Jan 2010, In: Freshwater Biology. 55, 1, p. 68-85 18 p.

Research output: Contribution to journalArticlepeer-review

A collaborative and adaptive process for developing environmental flow recommendations

Richter, B. D., Warner, A. T., Meyer, J. L. & Lutz, K., Mar 2006, In: River Research and Applications. 22, 3, p. 297-318 22 p.

Research output: Contribution to journalReview articlepeer-review