Staff profile

• Hydrology
• Water quality
• Groundwater-surface water interactions
• Catchment hydrology
• Tracers of flowpaths
• Stable water isotopes
• Rivers & streams

Journal Article

• Knapp, Julia L. A., Li, Li & Musolff, Andreas (2022). Hydrologic connectivity and source heterogeneity control concentration–discharge relationships. Hydrological Processes 36(9): e14683.
• Krause, Stefan, Abbott, Benjamin W., Baranov, Viktor, Bernal, Susana, Blaen, Phillip, Datry, Thibault, Drummond, Jennifer, Fleckenstein, Jan H., Velez, Jesus Gomez, Hannah, David M., Knapp, Julia L. A., Kurz, Marie, Lewandowski, Jörg, Martí, Eugènia, Mendoza‐Lera, Clara, Milner, Alexander, Packman, Aaron, Pinay, Gilles, Ward, Adam S. & Zarnetzke, Jay P. (2022). Organizational Principles of Hyporheic Exchange Flow and Biogeochemical Cycling in River Networks Across Scales. Water Resources Research 58(3): e2021WR029771.
• Popp, Andrea L., Manning, Cara C. M. & Knapp, Julia L. A. (2021). Rapid Advances in Mobile Mass Spectrometry Enhance Tracer Hydrology and Water Management. Water Resources Research 57(6): e2021WR029890.
• Li, Li, Sullivan, Pamela L., Benettin, Paolo, Cirpka, Olaf A., Bishop, Kevin, Brantley, Susan L., Knapp, Julia L. A., Meerveld, Ilja, Rinaldo, Andrea, Seibert, Jan, Wen, Hang & Kirchner, James W. (2021). Toward catchment hydro‐biogeochemical theories. WIREs Water
• von Freyberg, Jana, Knapp, Julia L. A., Rücker, Andrea, Studer, Bjørn & Kirchner, James W. (2020). Technical note: Evaluation of a low-cost evaporation protection method for portable water samplers. Hydrology and Earth System Sciences 24(12): 5821-5834.
• Kirchner, James W. & Knapp, Julia L. A. (2020). Technical note: Calculation scripts for ensemble hydrograph separation. Hydrology and Earth System Sciences 24(11): 5539.
• Knapp, Julia L. A., von Freyberg, Jana, Studer, Bjørn, Kiewiet, Leonie & Kirchner, James W. (2020). Concentration–discharge relationships vary among hydrological events, reflecting differences in event characteristics. Hydrology and Earth System Sciences 24(5): 2561-2576.
• Gootman, Kaylyn S., González‐Pinzón, Ricardo, Knapp, Julia L. A., Garayburu‐Caruso, Vanessa & Cable, Jaye E. (2020). Spatiotemporal Variability in Transport and Reactive Processes Across a First‐ to Fifth‐Order Fluvial Network. Water Resources Research 56(5).
• Comer-Warner, Sophie, Knapp, Julia L.A., Blaen, Phillip, Klaar, Megan, Shelley, Felicity, Zarnetske, Jay, Lee-Cullin, Joseph, Folegot, Silvia, Kurz, Marie, Lewandowski, Jorg, Harvey, Judson, Ward, Adam, Mendoza-Lera, Clara, Ullah, Sami, Datry, Thibault, Kettridge, Nicholas, Gooddy, Daren, Drummond, Jennifer, Martí, Eugènia, Milner, Alexander, Hannah, David & Krause, Stefan (2020). The method controls the story - Sampling method impacts on the detection of pore-water nitrogen concentrations in streambeds. Science of The Total Environment 709: 136075.
• Knapp, Julia L.A. & Kelleher, Christa (2020). A Perspective on the Future of Transient Storage Modeling: Let's Stop Chasing Our Tails. Water Resources Research 56(3).
• Ward, Adam S., Wondzell, Steven M., Schmadel, Noah M., Herzog, Skuyler, Zarnetske, Jay P., Baranov, Viktor, Blaen, Phillip J., Brekenfeld, Nicolai, Chu, Rosalie, Derelle, Romain, Drummond, Jennifer, Fleckenstein, Jan H., Garayburu-Caruso, Vanessa, Graham, Emily, Hannah, David, Harman, Ciaran J., Hixson, Jase, Knapp, Julia L. A., Krause, Stefan, Kurz, Marie J., Lewandowski, Jörg, Li, Angang, Martí, Eugènia, Miller, Melinda, Milner, Alexander M., Neil, Kerry, Orsini, Luisa, Packman, Aaron I., Plont, Stephen, Renteria, Lupita, Roche, Kevin, Royer, Todd, Segura, Catalina, Stegen, James, Toyoda, Jason, Wells, Jacqueline & Wisnoski, Nathan I. (2019). Spatial and temporal variation in river corridor exchange across a 5th-order mountain stream network. Hydrology and Earth System Sciences 23(12): 5199.
• Knapp, Julia L. A., Neal, Colin, Schlumpf, Alessandro, Neal, Margaret & Kirchner, James W. (2019). New water fractions and transit time distributions at Plynlimon, Wales, estimated from stable water isotopes in precipitation and streamflow. Hydrology and Earth System Sciences 23(10): 4367.
• Ward, Adam S., Kurz, Marie J., Schmadel, Noah M., Knapp, Julia L. A., Blaen, Phillip J., Harman, Ciaran J., Drummond, Jennifer D., Hannah, David M., Krause, Stefan, Li, Angang, Marti, Eugenia, Milner, Alexander, Miller, Melinda, Neil, Kerry, Plont, Stephen, Packman, Aaron I., Wisnoski, Nathan I., Wondzell, Steven M. & Zarnetske, Jay P. (2019). Solute Transport and Transformation in an Intermittent, Headwater Mountain Stream with Diurnal Discharge Fluctuations. Water 11(11): 2208.
• Ward, Adam S., Zarnetske, Jay P., Baranov, Viktor, Blaen, Phillip J., Brekenfeld, Nicolai, Chu, Rosalie, Derelle, Romain, Drummond, Jennifer, Fleckenstein, Jan H., Garayburu-Caruso, Vanessa, Graham, Emily, Hannah, David, Harman, Ciaran J., Herzog, Skuyler, Hixson, Jase, Knapp, Julia L. A., Krause, Stefan, Kurz, Marie J., Lewandowski, Jörg, Li, Angang, Martí, Eugènia, Miller, Melinda, Milner, Alexander M., Neil, Kerry, Orsini, Luisa, Packman, Aaron I., Plont, Stephen, Renteria, Lupita, Roche, Kevin, Royer, Todd, Schmadel, Noah M., Segura, Catalina, Stegen, James, Toyoda, Jason, Wells, Jacqueline, Wisnoski, Nathan I. & Wondzell, Steven M. (2019). Co-located contemporaneous mapping of morphological, hydrological, chemical, and biological conditions in a 5th-order mountain stream network, Oregon, USA. Earth System Science Data 11(4): 1567.
• Kelleher, Christa, Ward, Adam, Knapp, J. L. A., Blaen, P. J., Kurz, M. J., Drummond, J. D., Zarnetske, J. P., Hannah, D. M., Mendoza‐Lera, C., Schmadel, N. M., Datry, T., Lewandowski, J., Milner, A. M. & Krause, S. (2019). Exploring Tracer Information and Model Framework Trade‐Offs to Improve Estimation of Stream Transient Storage Processes. Water Resources Research 55(4): 3481.
• Guillet, Gaëlle, Knapp, Julia L.A., Merel, Sylvain, Cirpka, Olaf A., Grathwohl, Peter, Zwiener, Christian & Schwientek, Marc (2019). Fate of wastewater contaminants in rivers: Using conservative-tracer based transfer functions to assess reactive transport. Science of The Total Environment 656: 1250.
• Knapp, Julia L.A., Osenbrück, Karsten, Brennwald, Matthias S. & Cirpka, Olaf A. (2019). In-situ mass spectrometry improves the estimation of stream reaeration from gas-tracer tests. Science of The Total Environment 655: 1062.
• Knapp, Julia L. A. & Cirpka, Olaf A. (2018). A Critical Assessment of Relating Resazurin–Resorufin Experiments to Reach‐Scale Metabolism in Lowland Streams. Journal of Geophysical Research: Biogeosciences 123(12): 3538.
• Knapp, Julia L. A., González-Pinzón, Ricardo & Haggerty, Roy (2018). The Resazurin-Resorufin System: Insights From a Decade of “Smart” Tracer Development for Hydrologic Applications. Water Resources Research 54(9): 6877.
• Blaen, P.J., Kurz, M.J., Drummond, J.D., Knapp, J.L.A., Mendoza-Lera, C., Schmadel, N.M., Klaar, M.J., Jäger, A., Folegot, S., Lee-Cullin, J., Ward, A.S., Zarnetske, J.P., Datry, T., Milner, A.M., Lewandowski, J., Hannah, D.M. & Krause, S. (2018). Woody debris is related to reach-scale hotspots of lowland stream ecosystem respiration under baseflow conditions. Ecohydrology 11(5): e1952.
• Knapp, Julia L. A. & Cirpka, Olaf A. (2017). Determination of hyporheic travel time distributions and other parameters from concurrent conservative and reactive tracer tests by local‐in‐global optimization. Water Resources Research 53(6): 4984.
• Knapp, Julia L. A., González‐Pinzón, Ricardo, Drummond, Jennifer D., Larsen, Laurel G., Cirpka, Olaf A. & Harvey, Judson W. (2017). Tracer‐based characterization of hyporheic exchange and benthic biolayers in streams. Water Resources Research 53(2): 1575.
• Schmadel, Noah M., Ward, Adam S., Kurz, Marie J., Fleckenstein, Jan H., Zarnetske, Jay P., Hannah, David M., Blume, Theresa, Vieweg, Michael, Blaen, Phillip J., Schmidt, Christian, Knapp, Julia L.A., Klaar, Megan J., Romeijn, Paul, Datry, Thibault, Keller, Toralf, Folegot, Silvia, Arricibita, Amaia I. Marruedo & Krause, Stefan (2016). Stream solute tracer timescales changing with discharge and reach length confound process interpretation. Water Resources Research 52(4): 3227.
• Knapp, Julia L.A., Osenbrück, Karsten & Cirpka, Olaf A. (2015). Impact of non-idealities in gas-tracer tests on the estimation of reaeration, respiration, and photosynthesis rates in streams. Water Research 83: 205.