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| Titel |
A nitrogen model for European catchments: INCA, new model structure and equations |
| VerfasserIn |
A. J. Wade, P. Durand, V. Beaujouan, W. W. Wessel, K. J. Raat, P. G. Whitehead, D. Butterfield, K. Rankinen, A. Lepistö |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 6, no. 3 ; Nr. 6, no. 3, S.559-582 |
| Datensatznummer |
250003572
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| Publikation (Nr.) |
 copernicus.org/hess-6-559-2002.pdf |
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| Zusammenfassung |
| A
new version of the Integrated Nitrogen in Catchments model (INCA) was developed
and tested using flow and streamwater nitrate concentration data collected from
the River Kennet during 1998. INCA is a process-based model of the nitrogen
cycle in the plant/soil and in-stream systems. The model simulates the nitrogen
export from different land-use types within a river system, and the in-stream
nitrate and ammonium concentrations at a daily time-step. The structure of the
new version differs from the original, in that soil-water retention volumes have
been added and the interface adapted to permit multiple crop and vegetation
growth periods and fertiliser applications. The process equations are now
written in terms of loads rather than concentrations allowing a more robust
tracking of mass conservation when using numerical integration. The new version
is able to reproduce the seasonal dynamics observed in the streamwater nitrogen
concentration data, and the loads associated with plant/soil system nitrogen
processes reported in the literature. As such, the model results suggest that
the new structure is appropriate for the simulation of nitrogen in the River
Kennet and an improvement on the original model. The utility of the INCA model
is discussed in terms of improving scientific understanding and catchment
management.
Keywords: modelling, water quality, nitrogen, nitrate, River Kennet, River Thames |
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