Polder

Reclaimed land

A polder (Dutch pronunciation: [ˈpɔldər]) 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 The ground level in drained marshes subsides over time. All polders will eventually be below the surrounding water level some or all of the time.

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