Articles | Volume 19, issue 2
Hydrol. Earth Syst. Sci., 19, 981–996, 2015
https://doi.org/10.5194/hess-19-981-2015
Hydrol. Earth Syst. Sci., 19, 981–996, 2015
https://doi.org/10.5194/hess-19-981-2015

Research article 23 Feb 2015

Research article | 23 Feb 2015

Nitrogen surface water retention in the Baltic Sea drainage basin

P. Stålnacke et al.

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Cited articles

Alexander, R. B., Smith, R. A., and Schwarz, G. E.: Effect of stream channel size on the delivery of nitrogen to the gulf of Mexico, Nature, 403, 758–761, 2000.
Behrendt, H. and Opitz, D.: Retention of nutrients in river systems: dependence on specific runoff and hydraulic load, Hydrobiologia, 410, 111–122, 2000.
Bergström, S. and Carlsson, B.: River runoff to the Baltic Sea – 1950–1990, Ambio, 23, 280–287, 1994.
Billen, G., Thieu, V., Garnier, J., and Silvestre, M.: Modelling the N cascade in regional watersheds: The case study of the Seine, Somme and Scheldt rivers, Agr. Ecosyst. Environ., 133, 234–246, 2009.
Grimvall, A. and Stålnacke, P.: Statistical methods for source apportionment of riverine loads of pollutants, Environmetrics, 7, 201–213, 1996.
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Short summary
In this study, we used the MESAW statistical model to estimate the surface water N retention. Such large-scale estimates are lacking for the Baltic Sea and there are only a few studies of this globally. Our results show that around 380 000t of N are annually retained in surface waters draining to the Baltic Sea. The total annual riverine load from the 117 basins to the Baltic Sea was estimated at 570 000t of N, yielding a total surface water N retention of around 40%.