page_title: Koog
section_title: Drainage
hierarchical_section_title: Koog / Drainage
caption_attribution_description: English: Kinderdijk windmills, Netherlands Français&#160;: Moulins à vents de Kinderdijk (Hollande). Nederlands: De molens van Kinderdijk Русский: Ветряные мельницы в деревне Киндердейк, Нидерланды.
context_page_description: A koog or groden is a type of polder found on the North Sea coast of Germany that is established by the construction of dykes enclosing the land which is then drained to form marshland. This type of land reclamation is also used along rivers. In general, a koog is protected by embankments known as dykes.
context_section_description: Because a koog often lies below the level of the adjacent sea or river, it has to be continually drained. This is carried out with the aid of soakaways, sluices, pumping stations and water pumps.
  Today the pumps are powered by engines, in pre-industrial times and sometimes even into the period of intense industrialisation, they were driven by wind power (wind pumps). The groups of wind mills on the dykes of the Rhine delta - a symbol of the Netherlands - are old water pumps.
caption: (Pump) mill on a dyke at the Overwaard Polder near Kinderdijk
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