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| Titel |
Monitoring of phosphorus in Danish surface waters 1990-2012: Trends in phosphorus loading and phosphorus concentrations in streams, lakes and estuaries |
| VerfasserIn |
Jørgen Windolf, Brian Kronvang, Jacob Carstensen, Søren E. Larsen, Jens Bøgestrand, Dennis Trolle |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250100095
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| Publikation (Nr.) |
 EGU/EGU2014-15978.pdf |
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| Zusammenfassung |
| For more than 20 years an integrated, standardized monitoring programme of Danish surface
waters has provided information on status and trends in the phosphorus loading and
phosphorus concentrations of Danish waters. Although the land-based phosphorus loading of
Danish coastal waters has been reduced by 60For several decades the excess loading of
phosphorus from diffuse sources and sewage outlets contributed significantly to the
eutrophication of surface waters, and this is still the case. Measures taken to combat this
eutrophication have included among others improved sewage treatment, diversion of sewage
outlets from lakes and reduction of the phosphorus surplus on agricultural land. The overall
effects of the measures taken to reduce the phosphorus loading and thereby improve the water
quality will be presented for 15 Danish lakes and 10 estuaries and for 160 Danish streams
draining catchments with varying anthropogenic impacts. The generally reduced
phosphorus loading has led to a decrease in phosphorus concentrations in Danish lakes
and estuaries due to the direct – long-term – link between phosphorus loading and
phosphorus concentrations in lakes and estuaries. Special focus will be given to the
development since 1990 in phosphorus concentrations in 31 streams draining farmed
catchments with no significant sewage outlets and the potential factors influencing
trends and variations. In 14 of these streams there has been a significant reduction in
phosphorus concentrations since 1990, and for all the streams a general reduction of
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