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註釋The Water Framework Directive (WFD) requires EU member states to achieve good ecological and chemical status of all designated water bodies (rivers, lakes, transitional and coastal waters) by 2015. Therefore Rijkswaterstaat Waterdienst has initiated the project ‘Research mud dynamics Ems Estuary’. The aim of this project, carried out by Deltares and IMARES, is to (1) improve our knowledge on the mud dynamics in the Ems Estuary, (2) to identify the reasons for the increase in turbidity and (3) to quantify measures to improve the ecological status of the estuary.