experimenting with coupled hydro-ecological models to explore measure plans and water quality goals in a semi-enclosed swedish bay
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2015
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Abstract
Measure plans are currently being developed for the Water Framework Directive (WFD) by European water authorities. In Sweden, such plans include measures for good ecological status in the coastal ecosystem. However, the effect of suggested measures is not yet known. We therefore experimented with different nutrient reduction measures on land and in the sea, using a model system of two coupled dynamic models for a semi-enclosed bay and its catchment. The science question was whether it is worthwhile to implement measures in the local catchment area to reach local environmental goals, or if the status of the Bay is more governed by the water exchange with the Sea. The results indicate that by combining several measures in the catchment, the nutrient load can be reduced by 15%–20%. To reach the same effect on nutrient concentrations in the Bay, the concentrations of the sea must be reduced by 80%. Hence, in this case, local measures have a stronger impact on coastal water quality. The experiment also show that the present targets for good ecological status set up by the Swedish water authorities may be unrealistic for this Bay. Finally, we discuss when and how to use hydro-ecological models for societal needs.
| Reference Key |
arheimer2015waterexperimenting
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|---|---|
| Authors | ;Berit Arheimer;Johanna Nilsson;Göran Lindström |
| Journal | Journal of food biochemistry |
| Year | 2015 |
| DOI |
10.3390/w7073906
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| URL | |
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