The Trendermarsch polder (North Frisia, Germany) - Geophysical and geoarchaeological investigations of an anthropogenic medieval coastal landscape and its vulnerability against natural hazards

Since medieval times, North Frisia (Schleswig-Holstein, Germany) has experienced large-scale natural and man-made geomorphological changes. First, Frisian settlers turned the coastal marshes and fenlands into arable land but also increased the region's vulnerability to flooding. Then major storm surges drowned wide areas in 1362 CE and 1634 CE and many (geo-)archives that could provide knowledge about medieval man-environment interactions and the overall appearance of the coastal landscape at that time were irretrievably lost.