Polder
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A polder is a low-lying tract of land that forms an artificial hydrological entity, enclosed by embankments known as dikes. The three types of polder are:Land reclaimed from a body of water, such as a lake or the seabed
Flood plains separated from the sea or river by a dike
Marshes separated from the surrounding water by a dike and subsequently drained; these are also known as koogs, especially in Germany
Satellite image of Noordoostpolder, the Netherlands (595.41 km2)
Pumping station in Zoetermeer, Netherlands: The polder lies lower than the surrounding water on the other side of the dike. The Archimedes' screws are clearly visible.
The Yser river and West Flemish polders near Diksmuide
Schermer
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Schermer is a former municipality in the Netherlands, in the province of North Holland. The name came from "skir mere", which means "bright lake". Since 2015 it has been a part of Alkmaar.
Polder in Schermer
Image: 2013 Schermer