Blankensee (lake near Lübeck)

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Blankensee
Blankensee near Lübeck 03.JPG
The Blankensee near Lübeck from the east
Geographical location eastern Schleswig-Holstein
Tributaries Blankenseebach
Drain Blankenseebach
Places on the shore Lübeck-Blankensee , Seekrug , Tüschenbekermühle
Location close to the shore Great Grönau
Data
Coordinates 53 ° 47 '53 "  N , 10 ° 43' 28"  E Coordinates: 53 ° 47 '53 "  N , 10 ° 43' 28"  E
Blankensee (lake near Lübeck) (Schleswig-Holstein)
Blankensee (lake near Lübeck)
Altitude above sea level 9.9  m above sea level NN
surface 22.5 ha
volume 366,000 m³
scope 1.97 km
Maximum depth 2.7 m
Middle deep 1.63 m
Catchment area 2.77 km²

The Blankensee is a lake, half of which lies in the area of ​​the Hanseatic City of Lübeck and half of the municipality of Groß Sarau . It is part of the nature reserve Grönauer Heide, Grönauer Moor and Blankensee .

geography

The lake is to the east of the Lübeck district of the same name, Blankensee, Lübeck-St. Jürgen , and south of the Lübeck-Blankensee airport at a height of 9.9 m above sea ​​level and has a size of 22.5 hectares. The Flachsee has an average depth of only 1.63 m with a maximum depth of 2.7 meters. It is considered to be one of the few lime-poor lakes in Schleswig-Holstein. Located in the Natura 2000 area “Grönauer Heide, Grönauer Moor and Blankensee”, it is assigned to FFH - habitat type 3130 “Oligo- to mesotrophic stagnant water with vegetation of the Littorelletea uniflorae and / or the Isoeto-Nanojuncetea”. The inflow in the west and outflow in the east are via the Blankenseebach, which flows into the Wakenitz via the Grönau . In the bank areas there are mostly narrow reed belts , wet forests, alder quarries , an alder forest and grasslands. In the west there is a comparatively species-rich quarry forest .

history

Mills for using the water of the Blankensee 1590

In 1300 the Lübeck St. John's Monastery acquired half of the village of Blankensee from the Lübeck councilor Gottfried von Cremon and in 1360 also half of the lake. In comparison to the Möllner Pertinenzien , the city of Lübeck was confirmed territorial sovereignty over this property in 1749, which led to the demarcation between Lübeck and today's Duchy of Lauenburg in the middle of the lake. The southern half of the lake belonged sovereignly to the area of ​​the noble estate Tüschenbek . On the east bank, in the Hornstorf area, there used to be the Seekrug inn , on the south bank the Tüschenbeker Mühle , a windmill, was located. Street names remember both today. In addition, there was a water mill as a paper mill at the outflow of the lake. Another watermill was located in Groß Grönau shortly before the confluence of the Grönau in the Wakenitz. The gradient from Blankensee to Wakenitz is about six meters.

In the 20th century, the area around the lake was marked by the development of the airport on the one hand and the first associated barracks with associated training area on the other. After 1945 the barracks were used to accommodate refugees. The military use resumed in 1960 as the Hanseatic barracks ended in 1993.

Since January 2010 the entrepreneur Winfried Stöcker ( Euroimmun ) has owned 90 percent of the lake that is adjacent to his company premises. The remaining 10 percent are owned by the Hanseatic City of Lübeck.

Condition and use

Originally the Blankensee was a nutrient-poor lake with a sandy bottom. When the nature reserve was designated in 2006, however, the lake was found to be in a hypertrophic state, to which, in addition to agriculture, the discharge of aircraft de-icing residues from the airport had contributed. The assessment of the FFH habitat type showed a poor conservation status (conservation status C). Already after the Second World War, the pollution of the lake was caused by the sewage of an emergency reception center for refugees .

2009 was a successful phosphate - precipitation carried out, the improved water quality. Nevertheless, in 2012 it was still classified as a more disturbed body of water .

Until the end of 2007 the Blankensee, whose abundance of fish was known, was leased to a sport fishing club . Highlighted is a 13- pound catfish that was fished in the lake in the early 20th century. Due to its location in the nature reserve, the use of the lake is subject to severe restrictions today. In the 1920s, the great pond clam , the painter clam and the great river clam appeared in the fauna of the Blankensee . With regard to the flora of the area around the lake and the adjacent moor, a considerable decline in rare species was noted in the same context.

literature

  • Johannes Klöcking : Vorrade-Blankensee , No. 4 of the Lübeck Heimathefte , published by Charles Coleman, Lübeck 1927, p. 40 ff.
  • Werner Neugebauer : Beautiful Holstein , Lübeck 1957, p. 101 ff., P. 103 ff.

Web links

Commons : Blankensee (Lake near Lübeck)  - Collection of images, videos and audio files
  • Blankensee , information from the Agriculture and Environment Portal of the State of Schleswig-Holstein

Individual evidence

  1. ↑ a b c d e f g Blankensee, Characteristic Data , Ministry for Energy Transition, Agriculture, Environment and Rural Areas Schleswig-Holstein
  2. ↑ Digital Atlas North
  3. ↑ Blankensee Aktuell ( Memento of the original from February 26, 2014 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , accessed February 21, 2014.  @1@ 2Template: Webachiv / IABot / www.umweltdaten.landsh.de
  4. ↑ Management plan for the Fauna-Flora-Habitat-Area 2130-391 "Grönauer Heide, Grönauer Moor and Blankensee" Southern section: Blankensee and Blankenseebach valley from 2008, accessed on January 21, 2014.
  5. ^ Hanseaten-Kaserne , accessed on February 12, 2016.
  6. ^ A swap at the lake , TAZ article from May 22, 2010, accessed on February 21, 2014.
  7. ↑ Management plan for the Fauna-Flora-Habitat-Area 2130-391 "Grönauer Heide, Grönauer Moor and Blankensee" Southern section: Blankensee and Blankenseebach valley from 2008, accessed on January 21, 2014.
  8. ^ Neugebauer, Lit., p. 103.
  9. ↑ November 2010 One year later - How does the Blankensee develop after the phosphate precipitation? ( Memento of the original from February 26, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , accessed February 21, 2014.  @1@ 2Template: Webachiv / IABot / www.umweltdaten.landsh.de
  10. ↑ Development plan no. 03/10/00 “Airport commercial park” Expert opinion on nutrient retention , accessed on February 21, 2014.
  11. ^ Neugebauer, Lit., p. 103.
  12. ^ Vorrade-Blankensee , No. 4 of the Lübeck Heimathefte, published by Charles Coleman, Lübeck 1927, p. 44.
  13. ↑ With reference to the recordings by Gottfried Renatus Häcker : Lübeckische Flora. Aschenfeldt, Lübeck 1844 (digitized version)