Articles | Volume 25, issue 12
https://doi.org/10.5194/hess-25-6067-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-25-6067-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
30 Nov 2021
Research article |
| 30 Nov 2021
| 30 Nov 2021
Small-scale topography explains patterns and dynamics of dissolved organic carbon exports from the riparian zone of a temperate, forested catchment
Benedikt J. Werner
CORRESPONDING AUTHOR
Department of Hydrogeology, Helmholtz Centre for Environmental Research – UFZ, 04318 Leipzig, Germany
Oliver J. Lechtenfeld
Research group BioGeoOmics, Department of Analytical Chemistry, Helmholtz Centre for Environmental Research – UFZ, 04318 Leipzig, Germany
Andreas Musolff
Department of Hydrogeology, Helmholtz Centre for Environmental Research – UFZ, 04318 Leipzig, Germany
Gerrit H. de Rooij
Department of Soil System Sciences, Helmholtz Centre for Environmental Research – UFZ, 06120 Halle, Germany
Department of Hydrogeology, Helmholtz Centre for Environmental Research – UFZ, 04318 Leipzig, Germany
Ralf Gründling
Department of Soil System Sciences, Helmholtz Centre for Environmental Research – UFZ, 06120 Halle, Germany
Ulrike Werban
Department of Monitoring and Exploration Technologies, Helmholtz Centre for Environmental Research – UFZ, 04318 Leipzig, Germany
Jan H. Fleckenstein
Department of Hydrogeology, Helmholtz Centre for Environmental Research – UFZ, 04318 Leipzig, Germany
Hydrologic Modelling Unit, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
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Álvaro Pardo-Álvarez, Jan H. Fleckenstein, Kalliopi Koutantou, and Philip Brunner
EGUsphere, https://doi.org/10.5194/egusphere-2025-3521, https://doi.org/10.5194/egusphere-2025-3521, 2025
This preprint is open for discussion and under review for Geoscientific Model Development (GMD).
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An upgraded version of a numerical solver is introduced to better capture the three-dimensional interactions between surface water and groundwater. Built using open-source software, it adds new features to handle the complexity of real environments, including the representation of subsurface geology and the simulation of diverse dynamic processes, such as solute transport and heat transfer, in both domains. A test case and a full description of the novel features are provided in this paper.
Pia Ebeling, Andreas Musolff, Rohini Kumar, Andreas Hartmann, and Jan H. Fleckenstein
Hydrol. Earth Syst. Sci., 29, 2925–2950, https://doi.org/10.5194/hess-29-2925-2025, https://doi.org/10.5194/hess-29-2925-2025, 2025
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Groundwater is a crucial resource at risk due to droughts. To understand drought effects on groundwater levels in Germany, we grouped 6626 wells into six regional and two national patterns. Weather explained half of the level variations with varied response times. Shallow groundwater responds fast and is more vulnerable to short droughts (a few months). Dampened deep heads buffer short droughts but suffer from long droughts and recoveries. Two nationwide trend patterns were linked to human water use.
Luca Peruzzo, Ulrike Werban, Marco Pohle, Mirko Pavoni, Benjamin Mary, Giorgio Cassiani, Simona Consoli, and Daniela Vanella
EGUsphere, https://doi.org/10.5194/egusphere-2025-2117, https://doi.org/10.5194/egusphere-2025-2117, 2025
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Both spatial and temporal information are important in agriculture. Information regarding the above-ground variables ever-increasing in density and precision. On the contrary, below-ground information lags behind and has been typically limited to time series. This study uses methods that map the subsurface spatial variability. A numerical simulations of above- and below water fluxes are then based on such spatial information and additional time-oriented datasets that are common in agriculture.
Christoph Zielhofer, Marie Kaniecki, Anne Köhler, Vera Seeburg, Arnela Rollo, Laura Bergmann, Stefanie Berg, Barbara Stammel, Rita Gudermann, William J. Fletcher, Ulrike Werban, Anja Linstädter, and Natascha Mehler
E&G Quaternary Sci. J., 74, 105–124, https://doi.org/10.5194/egqsj-74-105-2025, https://doi.org/10.5194/egqsj-74-105-2025, 2025
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This study presents a quantitative reconstruction over a 235-year time frame of the development of the natural Donaumoos fen and Danube River into an anthroposphere. The selected proxies are the Donaumoos drainage ditch length and the Danube surface water area traced through the multi-temporal analysis of old maps. A comparison of quantitative proxies with the state of research from written sources leads to the discovery of potential great transitions in floodplain and peatland transformation.
Qiaoyu Wang, Jie Yang, Ingo Heidbüchel, Teng Xu, and Chunhui Lu
EGUsphere, https://doi.org/10.5194/egusphere-2025-676, https://doi.org/10.5194/egusphere-2025-676, 2025
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Extreme storms and droughts had profound impacts on water quality. We adapted a stochastic rainfall generator to examine how rainfall changes affect the transformation and transport of nitrogen (N) and its potential effects on water quality. We found that annual precipitation is an important factor impacting the transport of N. Wet/dry conditions of a year can significantly affect the transformation of N. Different dry-wet patterns during a year can change water quality in terms of nitrate.
Asha Nambiar and Gerrit Huibert de Rooij
EGUsphere, https://doi.org/10.5194/egusphere-2025-412, https://doi.org/10.5194/egusphere-2025-412, 2025
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The way infiltrating water moves in soil affects vegetation as well as groundwater recharge. This flow of soil water is captured by a mathematical function that covers all water contents from very dry to water-saturated. We tested several such functions for different soils and climates to see how model-calculated water fluxes are affected. Luckily, the effects of weather and the soil are much more important than the choice of the mathematical function.
Gerrit Huibert de Rooij
EGUsphere, https://doi.org/10.5194/egusphere-2024-3487, https://doi.org/10.5194/egusphere-2024-3487, 2025
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Water flows ever more slowly in soil when the soil dries out. This can be described by the conductivity curve that accounts for water filling up small spaces, sticking to grains if films, and water vapour diffusion. This paper introduces a relatively simple model for this curve that needs one parameter less then most others. It works well for most soils, but some need the extra parameter. The paper also presents a computer program to determine the parameter values of this and other models.
Peter Jung, Götz Hornbruch, Andreas Dahmke, Peter Dietrich, and Ulrike Werban
Solid Earth, 15, 1465–1477, https://doi.org/10.5194/se-15-1465-2024, https://doi.org/10.5194/se-15-1465-2024, 2024
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We demonstrate the feasibility of imaging vertical freezing boundaries using borehole ground-penetrating radar (GPR) in experimental geological latent heat storage, where part of a shallow Quaternary aquifer is frozen. To gain insights into the current thermal state in the subsurface, we assess the frozen volume dimension. We show that a combination of crosshole and reflection measurements allows us to image the ice body with high accuracy in the challenging environment of saturated sediments.
Arianna Borriero, Rohini Kumar, Tam V. Nguyen, Jan H. Fleckenstein, and Stefanie R. Lutz
Hydrol. Earth Syst. Sci., 27, 2989–3004, https://doi.org/10.5194/hess-27-2989-2023, https://doi.org/10.5194/hess-27-2989-2023, 2023
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We analyzed the uncertainty of the water transit time distribution (TTD) arising from model input (interpolated tracer data) and structure (StorAge Selection, SAS, functions). We found that uncertainty was mainly associated with temporal interpolation, choice of SAS function, nonspatial interpolation, and low-flow conditions. It is important to characterize the specific uncertainty sources and their combined effects on TTD, as this has relevant implications for both water quantity and quality.
Michael Rode, Jörg Tittel, Frido Reinstorf, Michael Schubert, Kay Knöller, Benjamin Gilfedder, Florian Merensky-Pöhlein, and Andreas Musolff
Hydrol. Earth Syst. Sci., 27, 1261–1277, https://doi.org/10.5194/hess-27-1261-2023, https://doi.org/10.5194/hess-27-1261-2023, 2023
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Agricultural catchments show elevated phosphorus (P) concentrations during summer low flow. In an agricultural stream, we found that phosphorus in groundwater was a major source of stream water phosphorus during low flow, and stream sediments derived from farmland are unlikely to have increased stream phosphorus concentrations during low water. We found no evidence that riparian wetlands contributed to soluble reactive (SR) P loads. Agricultural phosphorus was largely buffered in the soil zone.
Georg Kaufmann, Douchko Romanov, Ulrike Werban, and Thomas Vienken
Solid Earth, 14, 333–351, https://doi.org/10.5194/se-14-333-2023, https://doi.org/10.5194/se-14-333-2023, 2023
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We discuss collapse sinkholes occuring since 2004 on the sports field of Münsterdorf, a village north of Hamburg. The sinkholes, 2–5 m in size and about 3–5 m deep, develop in peri-glacial sand, with a likely origin in the Cretaceous chalk, present at about 20 m depth. The area has been analyzed with geophysical and direct-push-based methods, from which material properties of the subsurface have been derived. The properties have been used for mechanical models, predicting the subsidence.
Carolin Winter, Tam V. Nguyen, Andreas Musolff, Stefanie R. Lutz, Michael Rode, Rohini Kumar, and Jan H. Fleckenstein
Hydrol. Earth Syst. Sci., 27, 303–318, https://doi.org/10.5194/hess-27-303-2023, https://doi.org/10.5194/hess-27-303-2023, 2023
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The increasing frequency of severe and prolonged droughts threatens our freshwater resources. While we understand drought impacts on water quantity, its effects on water quality remain largely unknown. Here, we studied the impact of the unprecedented 2018–2019 drought in Central Europe on nitrate export in a heterogeneous mesoscale catchment in Germany. We show that severe drought can reduce a catchment's capacity to retain nitrogen, intensifying the internal pollution and export of nitrate.
Thomas Hermans, Pascal Goderniaux, Damien Jougnot, Jan H. Fleckenstein, Philip Brunner, Frédéric Nguyen, Niklas Linde, Johan Alexander Huisman, Olivier Bour, Jorge Lopez Alvis, Richard Hoffmann, Andrea Palacios, Anne-Karin Cooke, Álvaro Pardo-Álvarez, Lara Blazevic, Behzad Pouladi, Peleg Haruzi, Alejandro Fernandez Visentini, Guilherme E. H. Nogueira, Joel Tirado-Conde, Majken C. Looms, Meruyert Kenshilikova, Philippe Davy, and Tanguy Le Borgne
Hydrol. Earth Syst. Sci., 27, 255–287, https://doi.org/10.5194/hess-27-255-2023, https://doi.org/10.5194/hess-27-255-2023, 2023
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Although invisible, groundwater plays an essential role for society as a source of drinking water or for ecosystems but is also facing important challenges in terms of contamination. Characterizing groundwater reservoirs with their spatial heterogeneity and their temporal evolution is therefore crucial for their sustainable management. In this paper, we review some important challenges and recent innovations in imaging and modeling the 4D nature of the hydrogeological systems.
Felipe A. Saavedra, Andreas Musolff, Jana von Freyberg, Ralf Merz, Stefano Basso, and Larisa Tarasova
Hydrol. Earth Syst. Sci., 26, 6227–6245, https://doi.org/10.5194/hess-26-6227-2022, https://doi.org/10.5194/hess-26-6227-2022, 2022
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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.
Gerrit Huibert de Rooij
Hydrol. Earth Syst. Sci., 26, 5849–5858, https://doi.org/10.5194/hess-26-5849-2022, https://doi.org/10.5194/hess-26-5849-2022, 2022
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The way soils capture infiltrating water affects crops and natural vegetation as well as groundwater recharge. This retention of soil water is captured by a mathematical function that covers all water contents from very dry to water-saturated. Unfortunately, data in the dry range are often absent or unreliable. I modified an earlier function to be more robust in the absence of dry-range data, and present a computer program to estimate the parameters of the new function.
Jie Yang, Qiaoyu Wang, Ingo Heidbüchel, Chunhui Lu, Yueqing Xie, Andreas Musolff, and Jan H. Fleckenstein
Hydrol. Earth Syst. Sci., 26, 5051–5068, https://doi.org/10.5194/hess-26-5051-2022, https://doi.org/10.5194/hess-26-5051-2022, 2022
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We assessed the effect of catchment topographic slopes on the nitrate export dynamics in terms of the nitrogen mass fluxes and concentration level using a coupled surface–subsurface model. We found that flatter landscapes tend to retain more nitrogen mass in the soil and export less nitrogen mass to the stream, explained by the reduced leaching and increased potential of degradation in flat landscapes. We emphasized that stream water quality is potentially less vulnerable in flatter landscapes.
Pia Ebeling, Rohini Kumar, Stefanie R. Lutz, Tam Nguyen, Fanny Sarrazin, Michael Weber, Olaf Büttner, Sabine Attinger, and Andreas Musolff
Earth Syst. Sci. Data, 14, 3715–3741, https://doi.org/10.5194/essd-14-3715-2022, https://doi.org/10.5194/essd-14-3715-2022, 2022
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Environmental data are critical for understanding and managing ecosystems, including the mitigation of water quality degradation. To increase data availability, we present the first large-sample water quality data set (QUADICA) of riverine macronutrient concentrations combined with water quantity, meteorological, and nutrient forcing data as well as catchment attributes. QUADICA covers 1386 German catchments to facilitate large-sample data-driven and modeling water quality assessments.
Guilherme E. H. Nogueira, Christian Schmidt, Daniel Partington, Philip Brunner, and Jan H. Fleckenstein
Hydrol. Earth Syst. Sci., 26, 1883–1905, https://doi.org/10.5194/hess-26-1883-2022, https://doi.org/10.5194/hess-26-1883-2022, 2022
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In near-stream aquifers, mixing between stream water and ambient groundwater can lead to dilution and the removal of substances that can be harmful to the water ecosystem at high concentrations. We used a numerical model to track the spatiotemporal evolution of different water sources and their mixing around a stream, which are rather difficult in the field. Results show that mixing mainly develops as narrow spots, varying In time and space, and is affected by magnitudes of discharge events.
Joni Dehaspe, Fanny Sarrazin, Rohini Kumar, Jan H. Fleckenstein, and Andreas Musolff
Hydrol. Earth Syst. Sci., 25, 6437–6463, https://doi.org/10.5194/hess-25-6437-2021, https://doi.org/10.5194/hess-25-6437-2021, 2021
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Increased nitrate concentrations in surface waters can compromise river ecosystem health. As riverine nitrate uptake is hard to measure, we explore how low-frequency nitrate concentration and discharge observations (that are widely available) can help to identify (in)efficient uptake in river networks. We find that channel geometry and water velocity rather than the biological uptake capacity dominate the nitrate-discharge pattern at the outlet. The former can be used to predict uptake.
Katharina Blaurock, Burkhard Beudert, Benjamin S. Gilfedder, Jan H. Fleckenstein, Stefan Peiffer, and Luisa Hopp
Hydrol. Earth Syst. Sci., 25, 5133–5151, https://doi.org/10.5194/hess-25-5133-2021, https://doi.org/10.5194/hess-25-5133-2021, 2021
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Dissolved organic carbon (DOC) is an important part of the global carbon cycle with regards to carbon storage, greenhouse gas emissions and drinking water treatment. In this study, we compared DOC export of a small, forested catchment during precipitation events after dry and wet preconditions. We found that the DOC export from areas that are usually important for DOC export was inhibited after long drought periods.
Edoardo Martini, Matteo Bauckholt, Simon Kögler, Manuel Kreck, Kurt Roth, Ulrike Werban, Ute Wollschläger, and Steffen Zacharias
Earth Syst. Sci. Data, 13, 2529–2539, https://doi.org/10.5194/essd-13-2529-2021, https://doi.org/10.5194/essd-13-2529-2021, 2021
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We present the in situ data available from the soil monitoring network
STH-net, recently implemented at the Schäfertal Hillslope site (Germany). The STH-net provides data (soil water content, soil temperature, water level, and meteorological variables – measured at a 10 min interval since 1 January 2019) for developing and testing modelling approaches in the context of vadose zone hydrology at spatial scales ranging from the pedon to the hillslope.
Gerrit Huibert de Rooij, Juliane Mai, and Raneem Madi
Hydrol. Earth Syst. Sci., 25, 983–1007, https://doi.org/10.5194/hess-25-983-2021, https://doi.org/10.5194/hess-25-983-2021, 2021
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The way soils capture infiltrating water affects crops and natural vegetation and groundwater recharge. This retention of soil water is described by a mathematical function that covers all water contents from very dry to water saturated. We combined two existing lines of research to improve the behaviour of a popular function for very dry and very wet conditions. Our new function could handle a wider range of conditions than earlier curves. We provide fits to a wide range of soils.
Cited articles
Abbott, B. W., Baranov, V., Mendoza-Lera, C., Nikolakopoulou, M., Harjung, A., Kolbe, T., Balasubramanian, M. N., Vaessen, T. N., Ciocca, F., Campeau, A., Wallin, M. B., Romeijn, P., Antonelli, M., Goncalves, J., Datry, T., Laverman, A. M., de Dreuzy, J. R., Hannah, D. M., Krause, S., Oldham, C., and Pinay, G.: Using multi-tracer inference to move beyond single-catchment ecohydrology, Earth-Sci. Rev., 160, 19–42, https://doi.org/10.1016/j.earscirev.2016.06.014, 2016.
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.:
Crop evapotranspiration. Guidelines for computing crop water
requirements, in: Irrigation and Drainage, edited by: FAO, FAO, Rome, 1998.
Andersson, J.-O. and Nyberg, L.: Using official map data on topography, wetlands and vegetation cover for prediction of stream water chemistry in boreal headwater catchments, Hydrol. Earth Syst. Sci., 13, 537–549, https://doi.org/10.5194/hess-13-537-2009, 2009.
Battin, T. J., Kaplan, L. A., Newbold, J. D., and Hendricks, S. P.: A mixing model analysis of stream solute dynamics and the contribution of a hyporheic zone to ecosystem function, Freshwater Biol., 48, 995–1014, https://doi.org/10.1046/j.1365-2427.2003.01062.x, 2003.
Battin, T. J., Kaplan, L. A., Findlay, S., Hopkinson, C. S., Marti, E., Packman, A. I., Newbold, J. D., and Sabater, F.: Biophysical controls on organic carbon fluxes in fluvial networks, Nat. Geosci., 1, 95–100, https://doi.org/10.1038/ngeo101, 2008.
Bernhardt, E. S., Blaszczak, J. R., Ficken, C. D., Fork, M. L., Kaiser, K. E., and Seybold, E. C.: Control Points in Ecosystems: Moving Beyond the Hot Spot Hot Moment Concept, Ecosystems, 20, 665–682, https://doi.org/10.1007/s10021-016-0103-y, 2017.
Beven, K. J. and Kirkby, M. J.: A physically based, variable contributing area model of basin hydrology, Hydrolog. Sci. J., 24, 43–69, https://doi.org/10.1080/02626667909491834, 1979.
Birkel, C., Broder, T., and Biester, H.: Nonlinear and threshold-dominated runoff generation controls DOC export in a small peat catchment, J. Geophys. Res.-Biogeo., 122, 498–513, https://doi.org/10.1002/2016jg003621, 2017.
Birkel, C., Duvert, C., Correa, A., Munksgaard, N. C., Maher, D. T., and Hutley, L. B.: Tracer-Aided Modeling in the Low-Relief, Wet-Dry Tropics Suggests Water Ages and DOC Export Are Driven by Seasonal Wetlands and Deep Groundwater, Water Resour. Res., 56, e2019WR026175, https://doi.org/10.1029/2019WR026175, 2020.
Bishop, K., Seibert, J., Koher, S., and Laudon, H.: Resolving the Double Paradox of rapidly mobilized old water with highly variable responses in runoff chemistry, Hydrol. Process., 18, 185–189, https://doi.org/10.1002/hyp.5209, 2004.
Bracken, L. J., Wainwright, J., Ali, G. A., Tetzlaff, D., Smith, M. W., Reaney, S. M., and Roy, A. G.: Concepts of hydrological connectivity: Research approaches, pathways and future agendas, Earth-Sci. Rev., 119, 17–34, https://doi.org/10.1016/j.earscirev.2013.02.001, 2013.
Butman, D. E., Striegl, R. G., Stackpoole, S. M., Del Giorgio, P., Prairie, Y., Pilcher, D., Raymond, P., Pellat, F. P., and Alcocer, J.: Inland waters, 568–595, https://doi.org/10.7930/SOCCR2.2018.Ch14, 2018.
Catalán, N., Pastor, A., Borrego, C. M., Casas-Ruiz,
J. P., Hawkes, J. A., Gutiérrez, C., von Schiller, D., and
Marcé, R.: The relevance of environment vs. composition on
dissolved organic matter degradation in
freshwaters, Limnol. Oceanogr., 66, 306–320,
https://doi.org/10.1002/lno.11606, 2021.
Chantigny, M. H.: Dissolved and water-extractable organic matter in soils: a review on the influence of land use and management practices, Geoderma, 113, 357–380, https://doi.org/10.1016/S0016-7061(02)00370-1, 2003.
Cole, J. J., Prairie, Y. T., Caraco, N. F., McDowell, W. H., Tranvik, L. J., Striegl, R. G., Duarte, C. M., Kortelainen, P., Downing, J. A., Middelburg, J. J., and Melack, J.: Plumbing the global carbon cycle: Integrating inland waters into the terrestrial carbon budget, Ecosystems, 10, 171–184, https://doi.org/10.1007/s10021-006-9013-8, 2007.
Dadi, T., Harir, M., Hertkorn, N., Koschorreck, M., Schmitt-Kopplin, P., and Herzsprung, P.: Redox Conditions Affect Dissolved Organic Carbon Quality in Stratified Freshwaters, Environ. Sci. Technol., 51, 13705–13713, https://doi.org/10.1021/acs.est.7b04194, 2017.
Dawson, J. J. C., Bakewell, C., and Billett, M. F.: Is in-stream processing an important control on spatial changes in carbon fluxes in headwater catchments?, Sci. Total Environ., 265, 153–167, https://doi.org/10.1016/s0048-9697(00)00656-2, 2001.
Diamond, J. S., McLaughlin, D. L., Slesak, R. A., and Stovall, A.: Microtopography is a fundamental organizing structure of vegetation and soil chemistry in black ash wetlands, Biogeosciences, 17, 901–915, https://doi.org/10.5194/bg-17-901-2020, 2020.
Dick, J. J., Tetzlaff, D., Birkel, C., and Soulsby, C.: Modelling landscape controls on dissolved organic carbon sources and fluxes to streams, Biogeochemistry, 122, 361–374, https://doi.org/10.1007/s10533-014-0046-3, 2015.
Dittmar, T., Koch, B., Hertkorn, N., and Kattner, G.: A simple and efficient method for the solid-phase extraction of dissolved organic matter (SPE-DOM) from seawater, Limnol. Oceanogr.-Meth., 6, 230–235, https://doi.org/10.4319/lom.2008.6.230, 2008.
Doherty, J. E. and Hunt, R. J.: Approaches to highly parameterized inversion: a guide to using PEST for groundwater-model calibration, US Department of the Interior, US Geological Survey, Virginia, 2010.
Drake, T. W., Raymond, P. A., and Spencer, R. G. M.: Terrestrial carbon inputs to inland waters: A current synthesis of estimates and uncertainty, Limnol. Oceanogr. Lett., 3, 132–142, https://doi.org/10.1002/lol2.10055, 2018.
Fellman, J. B., Buma, B., Hood, E., Edwards, R. T., and D'Amore, D. V.: Linking LiDAR with streamwater biogeochemistry in coastal temperate rainforest watersheds, Can. J. Fish. Aquat. Sci., 74, 801–811, https://doi.org/10.1139/cjfas-2016-0130, 2017.
Frei, S., Lischeid, G., and Fleckenstein, J. H.: Effects of micro-topography on surface-subsurface exchange and runoff generation in a virtual riparian wetland – A modeling study, Adv. Water Resour., 33, 1388–1401, https://doi.org/10.1016/j.advwatres.2010.07.006, 2010.
Frei, S., Knorr, K. H., Peiffer, S., and Fleckenstein,
J. H.: Surface micro-topography causes hot spots of biogeochemical
activity in wetland systems: A virtual modeling experiment,
J. Geophys. Res.-Biogeo., 117, G00N12, https://doi.org/10.1029/2012jg002012,
2012.
Futter, M. N. and de Wit, H. A.: Testing seasonal and long-term controls of streamwater DOC using empirical and process-based models, Sci. Total Environ., 407, 698–707, https://doi.org/10.1016/j.scitotenv.2008.10.002, 2008.
Gao, H., Birkel, C., Hrachowitz, M., Tetzlaff, D., Soulsby, C., and Savenije, H. H. G.: A simple topography-driven and calibration-free runoff generation module, Hydrol. Earth Syst. Sci., 23, 787–809, https://doi.org/10.5194/hess-23-787-2019, 2019.
Grabs, T., Bishop, K., Laudon, H., Lyon, S. W., and Seibert, J.: Riparian zone hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports, Biogeosciences, 9, 3901–3916, https://doi.org/10.5194/bg-9-3901-2012, 2012.
Guarch-Ribot, A. and Butturini, A.: Hydrological conditions regulate dissolved organic matter quality in an intermittent headwater stream. From drought to storm analysis, Sci. Total Environ., 571, 1358–1369, https://doi.org/10.1016/j.scitotenv.2016.07.060, 2016.
Herndon, E. M., Dere, A. L., Sullivan, P. L., Norris, D., Reynolds, B., and Brantley, S. L.: Landscape heterogeneity drives contrasting concentration–discharge relationships in shale headwater catchments, Hydrol. Earth Syst. Sci., 19, 3333–3347, https://doi.org/10.5194/hess-19-3333-2015, 2015.
Herzsprung, P., Hertkorn, N., von Tümpling, W., Harir, M., Friese, K., and Schmitt-Kopplin, P.: Understanding molecular formula assignment of Fourier transform ion cyclotron resonance mass spectrometry data of natural organic matter from a chemical point of view, Anal. Bioanal. Chem., 406, 7977–7987, https://doi.org/10.1007/s00216-014-8249-y, 2014.
Herzsprung, P., Wentzky, V., Kamjunke, N., von
Tümpling, W., Wilske, C., Friese, K., Boehrer, B., Reemtsma, T.,
Rinke, K., and Lechtenfeld, O. J.: Improved Understanding of
Dissolved Organic Matter Processing in Freshwater Using
Complementary Experimental and Machine Learning Approaches,
Environ. Sci. Technol., 54, 13556–13565, https://doi.org/10.1021/acs.est.0c02383, 2020.
James, A. L. and Roulet, N. T.: Antecedent moisture conditions and catchment morphology as controls on spatial patterns of runoff generation in small forest catchments, J. Hydrol., 377, 351–366, https://doi.org/10.1016/j.jhydrol.2009.08.039, 2009.
Jencso, K. G., McGlynn, B. L., Gooseff, M. N., Wondzell, S. M., Bencala, K. E., and Marshall, L. A.: Hydrologic connectivity between landscapes and streams: Transferring reach-and plot-scale understanding to the catchment scale, Water Resour. Res., 45, W04428, https://doi.org/10.1029/2008wr007225, 2009.
Kaiser, K. and Kalbitz, K.: Cycling downwards –
dissolved organic matter in soils, Soil Biol. Biochem., 52, 29–32, https://doi.org/10.1016/j.soilbio.2012.04.002, 2012.
Kind, T. and Fiehn, O.: Seven Golden Rules for heuristic
filtering of molecular formulas obtained by accurate mass
spectrometry, BMC Bioinformatics, 8, 105, https://doi.org/10.1186/1471-2105-8-105, 2007.
Klaus, J. and McDonnell, J. J.: Hydrograph separation using stable isotopes: Review and evaluation, J. Hydrol., 505, 47–64, https://doi.org/10.1016/j.jhydrol.2013.09.006, 2013.
Koch, B. P., Kattner, G., Witt, M., and Passow, U.: Molecular insights into the microbial formation of marine dissolved organic matter: recalcitrant or labile?, Biogeosciences, 11, 4173–4190, https://doi.org/10.5194/bg-11-4173-2014, 2014.
Köhler, S. J., Buffam, I., Seibert, J., Bishop, K. H., and Laudon, H.: Dynamics of stream water TOC concentrations in a boreal headwater catchment: Controlling factors and implications for climate scenarios, J. Hydrol., 373, 44–56, https://doi.org/10.1016/j.jhydrol.2009.04.012, 2009.
Kottek, M., Grieser, J., Beck, C., Rudolf, B., and Rubel, F.: World Map of the Köppen-Geiger climate classification updated, Meteorol. Z., 15, 259–263, https://doi.org/10.1127/0941-2948/2006/0130, 2006.
Krause, S., Freer, J., Hannah, D. M., Howden, N. J. K., Wagener, T., and Worrall, F.: Catchment similarity concepts for understanding dynamic biogeochemical behaviour of river basins, Hydrol. Process., 28, 1554–1560, https://doi.org/10.1002/hyp.10093, 2014.
LaCroix, R. E., Tfaily, M. M., McCreight, M., Jones, M. E., Spokas, L., and Keiluweit, M.: Shifting mineral and redox controls on carbon cycling in seasonally flooded mineral soils, Biogeosciences, 16, 2573–2589, https://doi.org/10.5194/bg-16-2573-2019, 2019.
Larsen, S., Andersen, T., and Hessen, D. O.: Climate change predicted to cause severe increase of organic carbon in lakes, Glob. Change Biol., 17, 1186–1192, https://doi.org/10.1111/j.1365-2486.2010.02257.x, 2011.
Laudon, H., Kuglerova, L., Sponseller, R. A., Futter, M., Nordin, A., Bishop, K., Lundmark, T., Egnell, G., and Agren, A. M.: The role of biogeochemical hotspots, landscape heterogeneity, and hydrological connectivity for minimizing forestry effects on water quality, Ambio, 45, 152–162, https://doi.org/10.1007/s13280-015-0751-8, 2016.
Lê, S., Josse, J., and Husson, F.: FactoMineR: An R Package for Multivariate Analysis, J. Stat. Softw., 25, 1–18, https://doi.org/10.18637/jss.v025.i01, 2008.
Ledesma, J. L., Grabs, T., Bishop, K. H., Schiff, S. L., and Kohler, S. J.: Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments, Glob. Change Biol., 21, 2963–2979, https://doi.org/10.1111/gcb.12872, 2015.
Ledesma, J. L., Futter, M. N., Laudon, H., Evans, C. D., and Kohler, S. J.: Boreal forest riparian zones regulate stream sulfate and dissolved organic carbon, Sci. Total Environ., 560–561, 110–122, https://doi.org/10.1016/j.scitotenv.2016.03.230, 2016.
Ledesma, J. L. J., Futter, M. N., Blackburn, M., Lidman, F., Grabs, T., Sponseller, R. A., Laudon, H., Bishop, K. H., and Kohler, S. J.: Towards an Improved Conceptualization of Riparian Zones in Boreal Forest Headwaters, Ecosystems, 21, 297–315, https://doi.org/10.1007/s10021-017-0149-5, 2018a.
Ledesma, J. L. J., Kothawala, D. N., Bastviken, P., Maehder, S., Grabs, T., and Futter, M. N.: Stream Dissolved Organic Matter Composition Reflects the Riparian Zone, Not Upslope Soils in Boreal Forest Headwaters, Water Resour. Res., 54, 3896–3912, https://doi.org/10.1029/2017wr021793, 2018b.
Lessels, J. S., Tetzlaff, D., Carey, S. K., Smith, P., and Soulsby, C.: A coupled hydrology–biogeochemistry model to simulate dissolved organic carbon exports from a permafrost-influenced catchment, Hydrol. Process., 29, 5383–5396, https://doi.org/10.1002/hyp.10566, 2015.
Luke, S. H., Luckai, N. J., Burke, J. M., and Prepas, E. E.: Riparian areas in the Canadian boreal forest and linkages with water quality in streams, Environ. Rev., 15, 79–97, https://doi.org/10.1139/A07-001, 2007.
Manning, R., Griffith, J. P., Pigot, T., and Vernon-Harcourt, L. F.: On the flow of water in open channels and pipes, Transactions, Institution of Civ. Eng., Dublin, Ireland, 1891.
Matilainen, A., Gjessing, E. T., Lahtinen, T., Hed, L., Bhatnagar, A., and Sillanpaa, M.: An overview of the methods used in the characterisation of natural organic matter (NOM) in relation to drinking water treatment, Chemosphere, 83, 1431–1442, https://doi.org/10.1016/j.chemosphere.2011.01.018, 2011.
Moeck, C., Hunkeler, D., and Brunner, P.: Tutorials as a flexible alternative to GUIs: An example for advanced model calibration using Pilot Points, Environ. Modell. Softw., 66, 78–86, https://doi.org/10.1016/j.envsoft.2014.12.018, 2015.
Mostovaya, A., Koehler, B., Guillemette, F., Brunberg, A.-K., and Tranvik, L. J.: Effects of compositional changes on reactivity continuum and decomposition kinetics of lake dissolved organic matter, J. Geophys. Res.-Biogeo., 121, 1733–1746, https://doi.org/10.1002/2016JG003359, 2016.
Mostovaya, A., Hawkes, J. A., Dittmar, T., and Tranvik, L. J.: Molecular Determinants of Dissolved Organic Matter Reactivity in Lake Water, Front. Earth Sci., 5, 106, https://doi.org/10.3389/feart.2017.00106, 2017.
Musolff, A., Fleckenstein, J. H., Opitz, M., Buttner, O., Kumar, R., and Tittel, J.: Spatio-temporal controls of dissolved organic carbon stream water concentrations, J. Hydrol., 566, 205–215, https://doi.org/10.1016/j.jhydrol.2018.09.011, 2018.
Pinay, G., Peiffer, S., De Dreuzy, J. R., Krause, S., Hannah, D. M., Fleckenstein, J. H., Sebilo, M., Bishop, K., and Hubert-Moy, L.: Upscaling Nitrogen Removal Capacity from Local Hotspots to Low Stream Orders' Drainage Basins, Ecosystems, 18, 1101–1120, https://doi.org/10.1007/s10021-015-9878-5, 2015.
Pisani, O., Bosch, D. D., Coffin, A. W., Endale, D. M., Liebert, D., and Strickland, T. C.: Riparian land cover and hydrology influence stream dissolved organic matter composition in an agricultural watershed, Sci. Total Environ., 717, 137165, https://doi.org/10.1016/j.scitotenv.2020.137165, 2020.
Ploum, S. W., Laudon, H., Peralta-Tapia, A., and Kuglerová, L.: Are dissolved organic carbon concentrations in riparian groundwater linked to hydrological pathways in the boreal forest?, Hydrol. Earth Syst. Sci., 24, 1709–1720, https://doi.org/10.5194/hess-24-1709-2020, 2020.
Prairie, Y. T.: Carbocentric limnology: looking back, looking forward, Can. J. Fish. Aquat. Sci., 65, 543–548, https://doi.org/10.1139/f08-011, 2008.
R Core Team: R: A language and environment for statistical
computing. R Foundation for Statistical Computing, Vienna, Austria, available at:
http://www.R-project.org/ (last access: 11 November 2020), 2014.
Raeke, J., Lechtenfeld, O. J., Tittel, J., Oosterwoud, M. R., Bornmann, K., and Reemtsma, T.: Linking the mobilization of dissolved organic matter in catchments and its removal in drinking water treatment to its molecular characteristics, Water Res., 113, 149–159, https://doi.org/10.1016/j.watres.2017.01.066, 2017.
Raymond, P. A., Hartmann, J., Lauerwald, R., Sobek, S., McDonald, C., Hoover, M., Butman, D., Striegl, R., Mayorga, E., Humborg, C., Kortelainen, P., Dürr, H., Meybeck, M., Ciais, P., and Guth, P.: Global carbon dioxide emissions from inland waters, Nature, 503, 355–359, https://doi.org/10.1038/nature12760, 2013.
Rousseeuw, P. J.: Silhouettes – a Graphical Aid to the Interpretation and Validation of Cluster-Analysis, J. Comput. Appl. Math., 20, 53–65, https://doi.org/10.1016/0377-0427(87)90125-7, 1987.
Scheliga, B., Tetzlaff, D., Nuetzmann, G., and Soulsby, C.: Assessing runoff generation in riparian wetlands: monitoring groundwater–surface water dynamics at the micro-catchment scale, Environ. Monit. Assess., 191, 116, https://doi.org/10.1007/s10661-019-7237-2, 2019.
Seibert, J., Grabs, T., Köhler, S., Laudon, H., Winterdahl, M., and Bishop, K.: Linking soil- and stream-water chemistry based on a Riparian Flow-Concentration Integration Model, Hydrol. Earth Syst. Sci., 13, 2287–2297, https://doi.org/10.5194/hess-13-2287-2009, 2009.
Shen, Y., Chapelle, F. H., Strom, E. W., and Benner, R.: Origins and bioavailability of dissolved organic matter in groundwater, Biogeochemistry, 122, 61–78, https://doi.org/10.1007/s10533-014-0029-4, 2015.
Sherene, T.: Mobility and transport of heavy metals in polluted soil environment, Biological Forum – An International Journal, 2, 112–121, 2010
Stanley, E. H., Powers, S. M., Lottig, N. R., Buffam, I., and Crawford, J. T.: Contemporary changes in dissolved organic carbon (DOC) in human-dominated rivers: is there a role for DOC management?, Freshwater Biol., 57, 26–42, https://doi.org/10.1111/j.1365-2427.2011.02613.x, 2012.
Strohmeier, S., Knorr, K.-H., Reichert, M., Frei, S., Fleckenstein, J. H., Peiffer, S., and Matzner, E.: Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: insights from high frequency measurements, Biogeosciences, 10, 905–916, https://doi.org/10.5194/bg-10-905-2013, 2013.
Suecker, J. K., Ryan, J. N., Kendall, C., and Jarrett, R. D.: Determination of hydrologic pathways during snowmelt for alpine/subalpine basins, Rocky Mountain National Park, Colorado, Water Resour. Res., 36, 63–75, 2000.
Tang, Q., Kurtz, W., Schilling, O. S., Brunner, P., Vereecken, H., and Franssen, H. J. H.: The influence of riverbed heterogeneity patterns on river-aquifer exchange fluxes under different connection regimes, J. Hydrol., 554, 383–396, https://doi.org/10.1016/j.jhydrol.2017.09.031, 2017.
Tarboton, D. G.: A new method for the determination of flow directions and upslope areas in grid digital elevation models, Water Resour. Res., 33, 309–319, https://doi.org/10.1029/96wr03137, 1997.
Tfaily, M. M., Wilson, R. M., Cooper, W. T., Kostka, J. E., Hanson, P., and Chanton, J. P.: Vertical Stratification of Peat Pore Water Dissolved Organic Matter Composition in a Peat Bog in Northern Minnesota, J. Geophys. Res.-Biogeo., 123, 479–494, https://doi.org/10.1002/2017jg004007, 2018.
Therrien, R., McLaren, R., Sudicky, E., and Panday, S.: HydroGeoSphere: A three-dimensional numerical model describing fully-integrated subsurface and surface flow and solute transport, Groundwater Simulations Group, University of Waterloo, Waterloo, ON, 2010.
Vachon, D., Sponseller, R. A., and Karlsson, J.: Integrating carbon emission, accumulation and transport in inland waters to understand their role in the global carbon cycle, Glob. Change Biol., 27, 719–727, https://doi.org/10.1111/gcb.15448, 2021.
Wang, X., Zhang, H., Zhang, Y., Shi, Q., Wang, J., Yu, J., and Yang, M.: New Insights into Trihalomethane and Haloacetic Acid Formation Potentials: Correlation with the Molecular Composition of Natural Organic Matter in Source Water, Environ. Sci. Technol., 51, 2015–2021, https://doi.org/10.1021/acs.est.6b04817, 2017.
Wen, H., Perdrial, J., Abbott, B. W., Bernal, S., Dupas, R., Godsey, S. E., Harpold, A., Rizzo, D., Underwood, K., Adler, T., Sterle, G., and Li, L.: Temperature controls production but hydrology regulates export of dissolved organic carbon at the catchment scale, Hydrol. Earth Syst. Sci., 24, 945–966, https://doi.org/10.5194/hess-24-945-2020, 2020.
Werner, B. J.: High resolution spatial, chemical
(dissolved organic carbon) and hydrological dataset of the upper
Rappbode Catchment in the temperate Harz Mountains, Germany,
HydroShare [data set], https://doi.org/10.4211/hs.b32ba184414e475ba36a0bb193866ef1, 2021.
Werner, B. J., Musolff, A., Lechtenfeld, O. J., de Rooij, G. H., Oosterwoud, M. R., and Fleckenstein, J. H.: High-frequency measurements explain quantity and quality of dissolved organic carbon mobilization in a headwater catchment, Biogeosciences, 16, 4497–4516, https://doi.org/10.5194/bg-16-4497-2019, 2019.
Wilske, C., Herzsprung, P., Lechtenfeld, O. J., Kamjunke, N., and von Tumpling, W.: Photochemically Induced Changes of Dissolved Organic Matter in a Humic-Rich and Forested Stream, Water, 12, 331, https://doi.org/10.3390/w12020331, 2020.
Wilson, H. F. and Xenopoulos, M. A.: Effects of agricultural land use on the composition of fluvial dissolved organic matter, Nat. Geosci., 2, 37–41, https://doi.org/10.1038/ngeo391, 2008.
Wilson, H. F., Saiers, J. E., Raymond, P. A., and Sobczak, W. V.: Hydrologic Drivers and Seasonality of Dissolved Organic Carbon Concentration, Nitrogen Content, Bioavailability, and Export in a Forested New England Stream, Ecosystems, 16, 604–616, https://doi.org/10.1007/s10021-013-9635-6, 2013.
Wollschläger, U., Attinger, S., Borchardt, D., Brauns, M., Cuntz, M., Dietrich, P., Fleckenstein, J. H., Friese, K., Friesen, J., Harpke, A., Hildebrandt, A., Jäckel, G., Kamjunke, N., Knöller, K., Kögler, S., Kolditz, O., Krieg, R., Kumar, R., Lausch, A., Liess, M., Marx, A., Merz, R., Mueller, C., Musolff, A., Norf, H., Oswald, S. E., Rebmann, C., Reinstorf, F., Rode, M., Rink, K., Rinke, K., Samaniego, L., Vieweg, M., Vogel, H.-J., Weitere, M., Werban, U., Zink, M., and Zacharias, S.: The Bode hydrological observatory: a platform for integrated, interdisciplinary hydro-ecological research within the TERENO Harz/Central German Lowland Observatory, Environ. Earth Sci., 76, 1–25, https://doi.org/10.1007/s12665-016-6327-5, 2016.
Yang, J., Graf, T., and Ptak, T.: Impact of climate change on freshwater resources in a heterogeneous coastal aquifer of Bremerhaven, Germany: A three-dimensional modeling study, J. Contam. Hydrol., 177–178, 107–121, https://doi.org/10.1016/j.jconhyd.2015.03.014, 2015.
Yang, J., Heidbuchel, I., Musolff, A., Reinstorf, F., and Fleckenstein, J. H.: Exploring the Dynamics of Transit Times and Subsurface Mixing in a Small Agricultural Catchment, Water Resour. Res., 54, 2317–2335, https://doi.org/10.1002/2017wr021896, 2018.
Zarnetske, J. P., Bouda, M., Abbott, B. W., Saiers, J., and Raymond, P. A.: Generality of Hydrologic Transport Limitation of Watershed Organic Carbon Flux Across Ecoregions of the United States, Geophys. Res. Lett., 45, 11702–11711, https://doi.org/10.1029/2018gl080005, 2018.
Zhi, W., Li, L., Dong, W., Brown, W., Kaye, J., Steefel, C., and Williams, K. H.: Distinct Source Water Chemistry Shapes Contrasting Concentration-Discharge Patterns, Water Resour. Res., 55, 4233–4251, https://doi.org/10.1029/2018WR024257, 2019.
Short summary
Export of dissolved organic carbon (DOC) from riparian zones (RZs) is an important yet poorly understood component of the catchment carbon budget. This study chemically and spatially classifies DOC source zones within a RZ of a small catchment to assess DOC export patterns. Results highlight that DOC export from only a small fraction of the RZ with distinct DOC composition dominates overall DOC export. The application of a spatial, topographic proxy can be used to improve DOC export models.
Export of dissolved organic carbon (DOC) from riparian zones (RZs) is an important yet poorly...
