Articles | Volume 23, issue 9
Hydrol. Earth Syst. Sci., 23, 3503–3524, 2019
https://doi.org/10.5194/hess-23-3503-2019
Hydrol. Earth Syst. Sci., 23, 3503–3524, 2019
https://doi.org/10.5194/hess-23-3503-2019

Research article 02 Sep 2019

Research article | 02 Sep 2019

Trajectories of nitrate input and output in three nested catchments along a land use gradient

Sophie Ehrhardt et al.

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Cited articles

Abbott, B. W., Moatar, F., Gauthier, O., Fovet, O., Antoine, V., and Ragueneau, O.: Trends and seasonality of river nutrients in agricultural catchments: 18 years of weekly citizen science in France, Sci. Total Environ., 624, 845–858, https://doi.org/10.1016/j.scitotenv.2017.12.176, 2018. 
Altman, S. J. and Parizek, R. R.: Dilution of non-point source nitrate in ground water, J. Environ. Qual., 24, 11, 707–718, 1995. 
Aubert, A. H., Gascuel-Odoux, C., Gruau, G., Akkal, N., Faucheux, M., Fauvel, Y., Grimaldi, C., Hamon, Y., Jaffrézic, A., Lecoz-Boutnik, M., Molénat, J., Petitjean, P., Ruiz, L., and Merot, P.: Solute transport dynamics in small, shallow groundwater-dominated agricultural catchments: insights from a high-frequency, multisolute 10 yr-long monitoring study, Hydrol. Earth Syst. Sci., 17, 1379–1391, https://doi.org/10.5194/hess-17-1379-2013, 2013. 
Bach, M. and Frede, H. G.: Agricultural nitrogen, phosphorus and potassium balances in Germany-Methodology and trends 1979 to 1995, Z. Pflanzenernähr. Bodenk., 161, 385–393, 1998. 
Bach, M., Godlinski, F., and Greef, J.-M.: Handbuch Berechnung der Stickstoff-Bilanz für die Landwirtschaft in Deutschland Jahre 1990–2008, in: Berichte aus dem Julius Kühn-Institut 159, edited by: Julius Kühn-Institut, Federal Research Centre for Cultivated Plants, 36, Braunschweig, Germany, 2011. 
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Short summary
This study shows quantitative and temporal offsets between nitrogen input and riverine output, using time series of three nested catchments in central Germany. The riverine concentrations show lagged reactions to the input, but at the same time exhibit strong inter-annual changes in the relationship between riverine discharge and concentration. The study found a strong retention of nitrogen that is dominantly assigned to a hydrological N legacy, which will affect future stream concentrations.