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The Eider-Treene Depression (german: Eider-Treene-Niederung; da, Ejder-Trene-Sænkningen) is a landscape in west
Schleswig-Holstein Schleswig-Holstein (; da, Slesvig-Holsten; nds, Sleswig-Holsteen; frr, Slaswik-Holstiinj) is the northernmost of the 16 states of Germany, comprising most of the historical duchy of Holstein and the southern part of the former Duchy of Sch ...
in
North Germany Northern Germany (german: link=no, Norddeutschland) is a linguistic, geographic, socio-cultural and historic region in the northern part of Germany which includes the coastal states of Schleswig-Holstein, Mecklenburg-Vorpommern and Lower Saxony an ...
. It covers around the rivers
Eider Eiders () are large seaducks in the genus ''Somateria''. The three extant species all breed in the cooler latitudes of the Northern Hemisphere. The down feathers of eider ducks, and some other ducks and geese, are used to fill pillows and qui ...
, Treene and Sorge. The Eider-Treene Depression is the largest
wetland A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free ( anoxic) processes prevailing, especially in the soils. T ...
in the German state of Schleswig-Holstein. It includes one third of the moorland (bog) in the state and is a habitat to the largest inland group of meadow birds. To the north, its border runs between Hollingstedt and Treia, to the east near
Rendsburg Rendsburg ( da, Rendsborg, also ''Rensborg'', nds, Rendsborg, also ''Rensborg'') is a town on the River Eider and the Kiel Canal in the central part of Schleswig-Holstein, Germany. It is the capital of the ''Kreis'' (district) of Rendsburg-Eck ...
, to the south the boggy depression reaches to the Hanerau and Haalerau beyond the
Kiel Canal The Kiel Canal (german: Nord-Ostsee-Kanal, literally "North- oEast alticSea canal", formerly known as the ) is a long freshwater canal in the German state of Schleswig-Holstein. The canal was finished in 1895, but later widened, and links the ...
. Its western boundary with the Eiderstedt Marsh is unclear as
marsh A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found at ...
,
bog A bog or bogland is a wetland that accumulates peat as a deposit of dead plant materials often mosses, typically sphagnum moss. It is one of the four main types of wetlands. Other names for bogs include mire, mosses, quagmire, and muskeg ...
and
geest Geest is a type of landform, slightly raised above the surrounding countryside, that occurs on the plains of Northern Germany, the Northern Netherlands and Denmark. It is a landscape of sandy and gravelly soils formed as a glacial outwash plai ...
are interspersed. The region comprises the river valleys and their interfluvial geest ridges (''Geestkernen''). The landscape was formed during the
ice ages An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gree ...
, and altered by man as a result of dams and weirs built across the Eider, which was still a tidal river as far as Rendsburg until the 1920s. The region recently is encouraging "nature tourism" with walking, riding, cycling and canoe trips.


Sources

* Martin Becker, Gert Kaster: Kulturlandschaft Eider-Treene-Sorge. Wachholtz Verlag, Neumünster 2005


External links

* Eider-Treene Depression at the Schleswig-Holstein ecological travel guide Natural regions of Germany Regions of Schleswig-Holstein Dithmarschen Wetlands of Germany Bogs of Schleswig-Holstein BEiderTreene Eider (river) {{SchleswigHolstein-geo-stub