The term Luch (plural: Luche) is German and refers to an area of originally expansive, marshy or boggy lowland in northeast Germany, especially in the state of Brandenburg.
After the end of the Ice Age, the water table rose during the postglacial period resulting in the formation of bogs.
Before the installation of artificial drainage networks excess water often accumulated in the Luche in ponds.
Most of the Luche in Brandenburg have since been drained by man and have become cultural landscapes.
Archaeologists like Klaus Goldmann believe that some of this reclamation began during the Slavic period, but that this was reversed by a worsening of the drainage conditions as a result of the construction of mill dams on the Havel.