Articles | Volume 26, issue 23
https://doi.org/10.5194/hess-26-6227-2022
https://doi.org/10.5194/hess-26-6227-2022
Research article
 | 
12 Dec 2022
Research article |  | 12 Dec 2022

Disentangling scatter in long-term concentration–discharge relationships: the role of event types

Felipe A. Saavedra, Andreas Musolff, Jana von Freyberg, Ralf Merz, Stefano Basso, and Larisa Tarasova

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Cited articles

Arias, P., Bellouin, N., Coppola, E., Jones, R., Krinner, G., Marotzke, J., Naik, V., Palmer, M., Plattner, G. K., Rogelj, J., and Rojas, M.: Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, Technical Summary, https://www.ipcc.ch/report/ar6/wg1/ (last access: 8 December 2022), 2021. 
Basu, N. B., Thompson, S. E., and Rao, P. S. C.: Hydrologic and biogeochemical functioning of intensively managed catchments: A synthesis of top-down analyses, Water Resour. Res., 47, W00J15, https://doi.org/10.1029/2011WR010800, 2011. 
Bauwe, A., Tiemeyer, B., Kahle, P., and Lennartz, B.: Classifying hydrological events to quantify their impact on nitrate leaching across three spatial scales, J. Hydrol., 531, 589–601, https://doi.org/10.1016/j.jhydrol.2015.10.069, 2015. 
Benettin, P., Fovet, O., and Li, L.: Nitrate removal and young stream water fractions at the catchment scale, Hydrol. Process., 34, 2725–2738, https://doi.org/10.1002/hyp.13781, 2020. 
Bieroza, M. Z., Heathwaite, A. L., Bechmann, M., Kyllmar, K., and Jordan, P.: The concentration–discharge slope as a tool for water quality management, Sci. Total Environ., 630, 738–749, https://doi.org/10.1016/j.scitotenv.2018.02.256, 2018. 
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Short summary
Nitrate contamination of rivers from agricultural sources is a challenge for water quality management. During runoff events, different transport paths within the catchment might be activated, generating a variety of responses in nitrate concentration in stream water. Using nitrate samples from 184 German catchments and a runoff event classification, we show that hydrologic connectivity during runoff events is a key control of nitrate transport from catchments to streams in our study domain.