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| Titel |
Assessment of nutrient entry pathways and dominating hydrological processes in lowland catchments |
| VerfasserIn |
B. Schmalz, F. Tavares, N. Fohrer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Large-scale hydrological modelling and the European Union water policies ; Nr. 11 (2007-06-15), S.107-112 |
| Datensatznummer |
250009016
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| Publikation (Nr.) |
 copernicus.org/adgeo-11-107-2007.pdf |
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| Zusammenfassung |
The achievement of a good water quality in all water bodies until 2015 is
legally regulated since December 2000 for all European Union member states
by the European Water Framework Directive (EU, 2000). The aim of this project
is to detect nutrient entry pathways and to assess the dominating
hydrological processes in complex mesoscale catchments.
The investigated Treene catchment is located in Northern Germany as a part
of a lowland area. Sandy, loamy and peat soils are characteristic for this
area. Land use is dominated by agriculture and pasture. Drainage changed the
natural water balance. In a nested approach we examined two catchment areas:
a) Treene catchment 517 km2, b) Kielstau catchment 50 km2. The
nested approach assists to improve the process understanding by using data
of different scales. Therefore these catchments serve not only as an example
but the results are transferable to other lowland catchment areas.
In a first step the river basin scale model SWAT (Soil and Water Assessment
Tool, Arnold et al., 1998) was used successfully to model the water balance.
Furthermore the water quality was analysed to distinguish the impact of
point and diffuse sources. The results show that the tributaries in the
Kielstau catchment contribute high amounts of nutrients, mainly nitrate and
ammonium. For the parameters nitrate, ammonium and phosphorus it was
observed as a tendency that the annual loads were increasing along the river
profile of the Kielstau. |
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