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Großer Plöner See

Großer Plöner See
BosauBootssteg.jpg
Jetty at Bosau
Location Eastern Schleswig-Holstein
Coordinates 54°7′49″N 10°24′51″E / 54.13028°N 10.41417°E / 54.13028; 10.41417Coordinates: 54°7′49″N 10°24′51″E / 54.13028°N 10.41417°E / 54.13028; 10.41417
Primary inflows Schwentine
Primary outflows Schwentine
Catchment area 393 km2 (152 sq mi)
Basin countries Germany
Max. length 8.3 km (5.2 mi)
Max. width 7.1 km (4.4 mi)
Surface area 29.97 km2 (11.57 sq mi)
Average depth 13.54 m (44.4 ft)
Max. depth 58 m (190 ft) (east of Nehmten)
Water volume 373×10^6 m3 (13.2×10^9 cu ft)
Residence time 3 years
Shore length1 49.6 km (30.8 mi)
Surface elevation 21 m (69 ft)
Settlements Plön, Dersau, Bosau, Ascheberg
References Von Natur aus oligotrophes Gewässer, durch Umwelteinflüsse trotz eingeleiteter Gegenmaßnahmen jedoch noch immer leicht eutroph
1 Shore length is not a well-defined measure.

The Großer Plöner See ("Great Plön Lake") or Lake Plön is the largest lake (30 km²) in Schleswig-Holstein, Germany. It is located near the town of Plön. Its main tributary, as well as its main outflow, is the River Schwentine.

With an area of about 30 km² and a depth of up to 58 m the Großer Plöner See is the largest and deepest lake in the state of Schleswig-Holstein. It lies wholly within the Holstein Switzerland Nature Park.
On its north shore lies the county town of Plön, whose emblem depicts the lake below Plön Castle situated on a hill. Other settlements on the shore of the Großer Plöner See are Bosau, Dersau and Ascheberg.

The Große Plöner See emerged as a consequence of the glaciation of Schleswig-Holstein after the last ice age. It is a typical Weichselian glacial lake known as a Zungenbecken, whose shape may be especially well seen on the southern shore between Bosau and Nehmten. Two glaciers were largely responsible for forming the 58 m deep Plön Basin in the east at and shallower 30 m deep Ascherberger Basin in the west. The northern boundary of the lake consists of a land bridge between the Great and Little Plön Lakes, which was formed during a later advance of the ice sheet as a terminal moraine.

The eastern and the western parts of the lake are connected by an area of shallow water which was designated in 1992 as a nature reserve. In this area is the largest of the islands, providing a sheltered and quiet, breeding and moulting area for bird species such as white-tailed eagle, goldeneye, goosander and greylag goose.


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