Dobersdorfer See
| Dobersdorfer See | ||
|---|---|---|
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| View from Gut Dobersdorf to the lake | ||
| Geographical location | District of Plön , Schleswig-Holstein | |
| Tributaries | Selkau | |
| Drain | Jarbek to the Passader See | |
| Islands | Gull island | |
| Places on the shore | Dobersdorf , Schlesen | |
| Location close to the shore | Kiel | |
| Data | ||
| Coordinates | 54 ° 19 '7 " N , 10 ° 18' 22" E | |
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| Altitude above sea level | 18.92 m above sea level NN | |
| surface | 3.169 km² | |
| length | 2.7 km | |
| width | 1.82 km | |
| volume | 16.90 million m³ | |
| scope | 10.1 km | |
| Maximum depth | 18.8 m | |
| Middle deep | 5.33 m | |
| PH value | 8.5 | |
| Catchment area | 22.62 km² | |
The Dobersdorfer See is a lake between Schlesen (east bank) and the districts of Jasdorf (south bank), Gut Dobersdorf (west bank) and Tökendorf (northwest bank) of the municipality of Dobersdorf in the Schleswig-Holstein district of Plön .
General
The lake is about 312 hectares and is the thirteenth largest lake in Schleswig-Holstein. It has an average depth of 5.4 m, a maximum depth of 19.5 m and a direct water catchment area of about 24 km². The lake is divided into a western shallow and an eastern deep basin, which are separated from the seagull island. The only outflow is the Jarbek , through which about seven million m³ flow from the lake every year. This brook ends after approx. 1000 m in the Passader Lake , which drains over the Hagener Au into the Baltic Sea. The most important tributary is the Selkau , which flows into the lake about 100 m south of the Silesian border. The water level is regulated by a weir on Lake Passader.
history
The lake is located in a typical young moraine area in the provost . During the Ice Age , tongues of ice advancing from the north deepened the area of today's lake. Its shape was preserved by dead ice after the glaciers retreated . In the south of the lake there is still the terminal moraine of the Selent ice rim . The lake is one of the lime-rich polymictic lakes with largely unstable temperature stratification . Stable stratification only occurs in the deep basin in summer.
flora
A belt of reed beds is present in large areas of the banks . The dominant species there is the reed . The widest reed stands are on the western side of the lake, while on the southern side of the lake there is a silting area with dominant floating leaf plants of different species. An investigation in 1991 revealed 18 types of reed beds and 14 submerged (submerged) species. The lake was classified as eutrophic in a scientific study . The water is therefore cloudy and mostly colored by different algae.
fauna
Birds
The shores of the lake, some of which are protected, are breeding grounds for many bird species. Regular breeding birds include eagles , bitterns , marsh harrier , Common Goldeneye , Red-crested Pochard , Common Teal , Tufted Duck , Mallard , Coot , Mute Swan , Egyptian Goose , Greylag Goose , Canada Goose , Reed Warbler , Marsh Warbler , Sedge Warbler , Reed Warbler , grebes , herring gull , black-headed gull and cuckoo . The lake is also an important moulting site for tufted ducks.
A natural spectacle that can be observed regularly in autumn are swarms of sometimes tens of thousands of starlings who seek a sleeping quarters in the reed belt of the lake after spectacular flight maneuvers . Another natural spectacle, this time winter, is the incursion of sometimes thousands of cormorants , especially in times of ice formation on the nearby Baltic Sea coast .
fishes
According to the fishing results from 1992 and 1993, the lake appears to have only a low fish density. According to the investigation, this is probably due to the lack of food in the young fish, caused by low zooplankton densities . In terms of biomass, there are significant stocks of the following species in the lake in descending order: bream , roach , perch , pikeperch , pike , carp and eel . Furthermore, rudd , bream , gudgeon , ruddy perch , eel tadpole , tench , crucian carp and mud whip can be found. There is no known recapture of the whitefish , which was introduced a few years ago as a stock , that could provide information about a possible population.
Freetime activities
water sports
The water sports use of the lake is severely restricted by the owner. Surfing and canoeing are generally not permitted. Sailing is only permitted to residents with written permission and for a fee, which no one is currently using. Otherwise, the lake may only be used for fishing in rowing boats licensed by the state fishing association.
to bathe
On the lake there is an official bathing area in Schlesen and in Tökendorf, where problems with blue-green algae and cercaria occur regularly .
fishing
The lake is leased by the Schleswig-Holstein State Sport Fishing Association. Apart from two small land fishing spots in Tökendorf, it can only be fished from a rowboat.
Ice scating
In cold winters, the lake is a popular area for ice skating when the ice cover is sufficiently strong.
hike
The lake can be easily hiked on marked hiking trails. Around 12.5 kilometers have to be covered on a very varied route. Particularly noteworthy is a lookout point about one kilometer south of the outskirts of Silesia, which offers a very nice view over the lake.
See also
Individual evidence
- ↑ a b c d e Dobersdorfer See: Characteristic data . In: Ministry for Energy Transition, Agriculture, Environment and Rural Areas Schleswig-Holstein: Lakes (accessed on August 14, 2012)
- ↑ a b c Brigitte Nixdorf, Mike Hemm, Anja Hoffmann, Peggy Richter: Documentation of the condition and development of the most important lakes in Germany: Part 1 Schleswig-Holstein . Final report R&D project FKZ 299 24 274 on behalf of the Federal Environment Agency, 2004 ( PDF file; 2.1 MB )
- ↑ Baedeker, Karl: Baedekers Kiel: City guide from Karl Baedeker . Baedeker, 1990, ISBN 3-87954-081-0 , pp. 82 ( worldcat.org [accessed July 3, 2020]).