Germany

The Wadden Sea forms the interface between the open North Sea and the mainland, extending over a distance of about 450 km from Denmark via Germany to the Netherlands and reaching a width of up to 25 km along the German coast. For the German part of the Baltic Sea coastline, Jensen and Mudersbach studied mean, low and high water levels in comparison to the German North Sea coast using the normalized arithmetic mean of the four gauges at Travemunde, Warnemunde, Wismar and Sassnitz. Coastal groins Coastal groins represent one of the oldest coastal protection structures in Germany and still represent an important part of coastal protection schemes. In the German "Recommendation for Shore Protection Measures" the latter are named 'stream groins'. Wooden pile groins using various designs were also established on German North Sea islands, constructed both as permeable and impermeable groins.