With its location between the Baltic Sea and the river Oder the Szczecin Lagoon is heavily
influenced from both sites. Next to direct atmospheric deposition on the water surface area of the
lagoon the river Oder is the most important source for nutrient emissions. For the implementation
of the EC Water Framework Directive a considerable reduction of nutrient emissions to the Oder
and loads to the Lagoon have to be achieved. This study considers several management options
with a great potential for the reduction of emissions, although, especially for nitrogen, it seems
unlikely to meet the reduction goals until 2015.
By the implementation of the Waste water Ordinance (AbwV) emissions can be reduced
significantly. As in the Oder catchment the nitrogen surplus on agricultural land is in most cases
lower then requested from the Fertilizer Ordinance, its implementation will only have very limited
effect on the nutrient emissions. The development of nitrogen surplus has shown an increasing
trend for the last years, which suggests gaining importance for future emissions from this source.
The European Monitoring and Evaluation Programme EMEP (Co-operative Programme for
Monitoring and Evaluation of the Long-Range Transmission of Air Pollutants in Europe) proposed
a reduction of atmospheric deposition until 2015, which would have a positive effect for both direct
depositions on the water surface area of the lagoon and the emissions from the Oder catchment.
Management options to reduce emissions via urban systems, erosion and tile drainages should be
implemented in hot spot areas and can in total contribute to a relevant reduction of the total
emissions from the catchment. Hot spot areas have been identified by the impact ratio. For setting
up management plans, however, a further consideration of the spatial distribution of monthly
nutrient emissions is suggested.