Jonathan M. Duncan, Ph.D., M.P.A.

Jonathan M. Duncan, Ph.D., M.P.A.

  • Associate Professor of Hydrology
306 Forest Resources Building
University Park, PA 16802

Areas of Expertise

  • Ecohydrology
  • Hydrology
  • Biogeochemistry
  • Terrain Analysis
  • Water Quality
  • Watershed Management


  • B.S. SUNY Geneseo
  • M.S. SUNY Environmental Science & Forestry
  • M.P.A. Maxwell School of Syracuse University
  • Ph.D. University of North Carolina at Chapel Hill


Prioritizing conservation practice locations for effective water quality improvement using the Agricultural Conservation Planning Framework (ACPF) and the Soil and Water Assessment Tool (SWAT)
Journal of Environmental Management, Rohith, A. N., Karki, R., Veith, T. L., Preisendanz, H. E., Duncan, J. M., Kleinman, Peter J A, Cibin, R., 2024

Spatial and Temporal Patterns of Nitrogen Mobilization in Residential Lawns
Ecosystems, Suchy, Amanda K., Groffman, Peter M., Band, Lawrence E., Duncan, Jonathan M., Gold, Arthur J., Grove, J. Morgan, Locke, Dexter H., Templeton, Laura, Zhang, Ruoyu, 2023

Hydro-bio-geo-socio-chemical interactions and the sustainability of residential landscapes
PNAS Nexus, Groffman, Peter M., Suchy, Amanda K., Locke, Dexter H., Johnston, Robert J., Newburn, David A., Gold, Arthur J., Band, Lawrence E., Duncan, Jonathan, Grove, J. Morgan, Kao-Kniffin, Jenny, Meltzer, Hallee, Ndebele, Tom, O'Neil-Dunne, Jarlath, Polsky, Colin, Thompson, Grant L., Wang, Haoluan, Zawojska, Ewa, 2023

Critical zone perspectives for managing changing forests
Forest Ecology and Management, Kopp, Marissa, Alving, Denise, Blackman, Taylor, Kaye, Margot, Duncan, Jonathan, Kaye, Jason, 2023

Long-term trends in nitrate and chloride in streams in an exurban watershed
Urban Ecosystems, Castiblanco, Emma S., Groffman, Peter M., Duncan, Jonathan, Band, Lawrence E., Doheny, Edward, Fisher, Gary T., Rosi, Emma, Suchy, Amanda K., 2023

Spatial Heterogeneity and Temporal Stability of Baseflow Stream Chemistry in an Urban Watershed
Water Resources Research, Welty, Claire, Moore, Joel, Bain, Daniel J., Talebpour, Mahdad, Kemper, John T., Groffman, Peter M., Duncan, Jonathan M., 2023

Identifying Sweet Spots for Green Stormwater Infrastructure Implementation: A Case Study in Lancaster, Pennsylvania
Journal of Sustainable Water in the Built Environment, Yavari Bajehbaj, Rouhangiz, Bajehbaj, Rouhangiz, Wu, Hong, Grady, Caitlin, Brent, Daniel, Clark, Shirley Elizabeth, Cibin, Raj, Duncan, Jonathan, Kumar Chaudhary, Anil, McPhillips, Lauren E., 2023

Simulation of spatially distributed sources, transport, and transformation of nitrogen from fertilization and septic system in an exurban watershed
Hydrology and Earth System Sciences Discussions, Zhang, Ruoyu, Band, Lawrence, Groffman, Peter, Suchy, Amanda, Duncan, Jonathan, Gold, Arther, 2023

With warming, spring streamflow peaks are more coupled with vegetation green-up than snowmelt in the northeastern United States
Hydrological Processes, Khodaee, Mahsa, Hwang, Taehee, Ficklin, Darren L., Duncan, Jonathan M., 2022

The Nonpoint Sources and Transport of Baseflow Nitrogen Loading Across a Developed Rural-Urban Gradient
Water Resources Research, Delesantro, Joseph, Duncan, Jonathan, Riveros-Iregui, Diego, Blaszczak, Joanna, Bernhardt, Emily, Urban, Dean, Band, Lawrence, 2022

An open-source automated workflow to delineate storm events and evaluate concentration-discharge relationships
Hydrological Processes, Millar, David, Buda, Anthony, Duncan, Jonathan, Kennedy, Casey, 2022

Spatial asynchrony in environmental and economic benefits of stream restoration
Environmental Research Letters, Zhang, Ruoyu, Newburn, David, Rosenberg, Andrew, Lin, Laurence, Groffman, Peter, Duncan, Jonathan, Band, Lawrence, 2022

Characterizing and classifying urban watersheds with compositional and structural attributes
Hydrological Processes, Delesantro, Joseph M., Duncan, Jonathan M., Riveros-Iregui, Diego, Blaszczak, Joanna R., Bernhardt, Emily S., Urban, Dean L., Band, Lawrence E., 2021

Are spatial patterns of soil moisture at plot scales generalisable across catchments, climates, and other characteristics? A synthesis of synoptic soil moisture across the Mid-Atlantic
Hydrological Processes, Scaife, Charles I., Duncan, Jonathan M., Lin, Laurence, Tague, Christina, Bell, Colin D., Band, Lawrence, 2021

Assessing urban rainfall-runoff response to stormwater management extent
Hydrological Processes, Miller, Andrew J., Welty, Claire, Duncan, Jonathan M., Baeck, Mary Lynn, Smith, James A., 2021

A landscape approach to nitrogen cycling in urban lawns reveals the interaction between topography and human behaviors
Biogeochemistry, Suchy, Amanda K., Groffman, Peter M., Band, Lawrence E., Duncan, Jonathan M., Gold, Arthur J., Grove, J. Morgan, Locke, Dexter H., Templeton, Laura, 2021

The Limits of Homogenization: What Hydrological Dynamics can a Simple Model Represent at the Catchment Scale?
Water Resources Research, Wen, Hang, Brantley, S, Davis, K, Duncan, Jonathan, Li, L, 2021

The Agricultural Conservation Planning Framework: Opportunities and challenges in the eastern United States
Agricultural and Environmental Letters, Duncan, Jonathan M., Respess, Zachary, Ryan, William, Austin, Robert, Royer, Matthew, Osmond, Deanna, Kleinman, Peter, 2021

On the controls of preferential flow in soils of different hillslope position and lithological origin
Hydrological Processes, Tang, Qicheng, Duncan, Jonathan M., Guo, Li, Lin, Henry, Xiao, Dacheng, Eissenstat, David M., 2020

Pennsylvania Climate Change Impacts Assessment Update for PA Department of Environmental Protection, Shortle, J, Abler, D, Blumsack, S, Duncan, Jonathan, Fernandez, C, Keller, K, 2020

Best Management Practices for Diffuse Nutrient Pollution: Wicked Problems across Urban and Agricultural Watersheds
Environmental Science & Technology, Lintern, Anna, McPhillips, Lauren, Winfrey, Brandon, Duncan, Jonathan, Grady, Caitlin, 2020

A global perspective on phosphorus management decision support in agriculture: Lessons learned and future directions
Journal of Environmental Quality, Drohan, Patrick, Bechmann, Marianne, Buda, Anthony, Djodjic, Faruk, Doody, Donnacha, Duncan, Jonathon M., Iho, Antti, Jordan, Phil, Kleinman, Peter, McDowell, Richard, others, None, Mellander, Per, Thomas, Ian, Withers, Paul, 2019

Changes in long-term water quality of Baltimore streams are associated with both gray and green infrastructure
Limnology and Oceanography, Reisinger, Alexander J., Woytowitz, Ellen, Majcher, Emily, Rosi, Emma J., Belt, Kenneth T., Duncan, Jonathan M., Kaushal, Sujay S., Groffman, Peter M., 2019

Applying the Watershed Approach to Urban Ecosystems, Groffman, P, Band, L, Belt, K, Bettez, N, Bhaskar, A, Duncan, Jonathan, 2019

Establishment of Multifunctional Riparian Buffers
STAC Publication, Herbstritt, S, Vazhnik, V, Fowler, L, Richard, T, Harvey, A, Duncan, Jonathan, 2019

Monitoring the riverine pulse: Applying high-frequency nitrate data to advance integrative understanding of biogeochemical and hydrological processes
Wiley Interdisciplinary Reviews: Water, Burns, Douglas A., Pellerin, Brian A., Miller, Matthew P., Capel, Paul D., Tesoriero, Anthony J., Duncan, Jonathan M., 2019

Leveraging Big Data Towards Functionally-Based, Catchment Scale Restoration Prioritization
Environmental Management, Lovette, John P., Duncan, Jonathan M., Smart, Lindsey S., Fay, John P., Olander, Lydia P., Urban, Dean L., Daly, Nancy, Blackwell, Jamie, Hoos, Anne B., García, Ana María, Band, Lawrence E., 2018

Changes in long‐term water quality of Baltimore streams are associated with both gray and green infrastructure
Limnology & Oceangraphy, Reisinger, A, Woyowitz, Ellen, Woytowitz, E, Rosi, Emma, Belt, Ken, Duncan, Jonathan, Kaushal, Sujay, Groffman, Peter, 2018

Dynamics of nitrate concentration-discharge patterns in an urban watershed
Water Resources Research, Duncan, Jonathan M., Welty, Claire, Kemper, John T., Groffman, Peter M., Band, Lawrence E., 2017

Variable nitrate concentration–discharge relationships in a forested watershed
Hydrological Processes, Duncan, Jonathan M., Band, Lawrence E., Groffman, Peter M., 2017

Climate Variation Overwhelms Efforts to Reduce Nitrogen Delivery to Coastal Waters
Ecosystems, Bettez, Neil D., Duncan, Jonathan M., Groffman, Peter M., Band, Lawrence E., O’Neil-Dunne, Jarlath, Kaushal, Sujay S., Belt, Kenneth T., Law, Neely, 2015

Mechanisms driving the seasonality of catchment scale nitrate export: Evidence for riparian ecohydrologic controls
Water Resources Research, Duncan, Jonathan M., Band, Lawrence E., Groffman, Peter M., Bernhardt, Emily S., 2015

Ecohydrological flow networks in the subsurface
Ecohydrology, Band, L. E., McDonnell, J. J., Duncan, J. M., Barros, A., Bejan, A., Burt, T., Dietrich, W. E., Emanuel, R. E., Hwang, T., Katul, G., Kim, Y., McGlynn, B., Miles, B., Porporato, A., Scaife, C., Troch, P. A., 2014

Spatial and Temporal Scaling of Nitrogen Cycling and Export: Resolving Three Paradoxes for a Forested Piedmont Watershed, Duncan, Jonathan, 2014