The Hypertrophic Estuary of Mariager Fjord: Pollution of CoastalWaters
Translated title
Authors
Term
2. term
Publication year
2015
Submitted on
2015-06-03
Pages
71
Abstract
Mariager Fjord er en meget eutrofieret fjord og anses for at have en dårlig vandkvalitet ifølge vandplanen for Mariager Fjord. Dette er forårsaget af en høj belastning af kvælstof og fosfor til fjorden fra de tilstødende vandløb. Ifølge Vandrammedirektivet skal alle Europas vandområder opnå en god tilstand inden udgangen af år 2015. I denne rapport, vil reduktionen af næringsstoffer blive undersøgt ved at udvikle en økologisk og hydrodynamisk model. Endvidere vil der blive analyseret på modellens optræden i forhold til reduktion af næringsstoffer. Udover det, vil en konceptual løsning blive undersøgt for at forbedre vandkvaliteten i fjorden. Selvom reduktion af kvælstof kan muliggøres ved at implementere de foreslåede løsninger, vil kriteriet om god vandkvalitet inden udgangen af år 2015, ikke blive opnået i tide. Det er stadigvæk muligt at en god vandkvalitet kan opnås i en nær fremtid.
Mariager Fjord is a highly eutrophicated estuary and is considered to have a bad water quality according to the Aquatic Plan 1.3 [2011] for Mariager Fjord. This is caused by a high nitrogen and phosphorus load into the fjord from the adjacent streams. The Water Framework Directive [2000] states that all European water bodies must reach a good water quality at the end of 2015. In this report, the nutrient reduction is going to be investigated by setting up an ecological model and a hydrodynamic model. Furthermore, the behaviour of the ecological model is going to be observed in regards to the nutrient reductions. In order to improve the water quality of the fjord, a conceptual solution is going to be studied. Although nitrogen reduction can be achieved by implementing the suggested solutions, the criteria for the end of 2015 cannot be complied in time. It is possible though that a good water quality can be reached in the near future.
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