Mittelsee (Erftstadt)
| Central Lake | ||
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| Mittelsee in Erftstadt | ||
| Geographical location | North Rhine-Westphalia , Germany | |
| Tributaries | Cascade from the Obersee | |
| Drain | Cascade into the Untersee | |
| Places on the shore | Liblar | |
| Location close to the shore | Erftstadt , Brühl | |
| Data | ||
| Coordinates | 50 ° 48 '39 " N , 6 ° 50' 40" E | |
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| Altitude above sea level | 102.0 | |
| surface | 5.9 ha | |
| length | 445 m | |
| width | 200 m | |
| volume | 0.14 m³ | |
| Maximum depth | 6.4 | |
| Middle deep | 2.4 | |
| PH value | 8.0 | |
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particularities |
Residual lake from an open-cast lignite mine |
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| Map of the Villeseen | ||
The Mittelsee is an artificially created body of water in the area of the cities of Erftstadt and Brühl in the Rhein-Erft district in North Rhine-Westphalia . It is part of the villa lakes of the Rhineland Nature Park , created by the mining of lignite .
location
The lake is part of a chain of lakes in the Ville , which consists of the Obersee , which is around three to four meters higher in the southwest, the Mittelsee and the Untersee, which is three to four meters lower . It is located in the southwest of the district of Brühl and in the western area of the district of Erftstadt. The chain of lakes is surrounded by other bodies of water. These are in the northwest of the Franziskussee , in the northeast of the Schluchtsee , in the southeast of the duck ponds and in the south of the Donatussee .
history
Lignite was mined in the region from the end of the 19th to the middle of the 20th century. From 1925 workers began to recultivate the land . The existing opencast mining holes were filled with groundwater and were largely left to their further development. In this way, the Mittelsee was created in the southern district. In 1965, a railway line on the Upper and Lower Lakes was dismantled. The lake was designated as a landscape protection area in 1972 and has been part of the FFH and nature reserve Upper, Middle and Lower Lake in the Ville chain of lakes since 2003 . The Middle Sea is polluted with sulphate due to the leaching of lignite ash. It probably comes from the Obersee, as no such contaminated site is known in the Mittelsee itself .
fauna and Flora
Due to the recultivation, the nutrient input from the outside decreased, which increased the biodiversity. When reforesting, foresters used beech , pine , red oak and larch in particular . The population of dwarf hedgehog cobs is particularly endangered .
Bird species include the middle woodpecker , the black woodpecker and the cormorant , as well as the coot , the great crested grebe , the tufted duck , the pochard , the pond and water rail and the little grebe . In the shores of dragonfly species were detected including 32, Early reeds hunters , the Common winter damsel , the Great Purple Emperor , the key spot Hawker , the Little Emperor Dragonfly , the top spot and the leucorrhinia caudalis . The particularly endangered species include the Ephemera glaucops from the family of mayflies and the scarlet dragonfly . Real perch , bream , pike , rainbow trout , roach and rudd , tench and pikeperch live in the water .
Use and development
The lake is not designated as bathing water. Fishing is allowed with a fishing license . There is an extensive network of hiking trails around the water.
The LANUV recommends avoiding additional nutrient enrichment in the lake. For this purpose, the north bank in particular should be secured so that there are no inputs from soil erosion . An expert opinion from 1993 also suggests raising the water level by 30 cm in order to create additional shallow sections of water.
Web links
- Upper, Middle and Lower Lakes in the Ville-Seenkette , website of the Biological Station Bonn / Rhein-Erft, accessed on June 21, 2019.
Individual evidence
- ↑ a b c d e f g Brigitte Nixdorf, Mike Hemm, Anja Schlundt, Maria Kapfer, Harwig Krumbeck of the Brandenburg Technical University Cottbus in cooperation with the UFZ Magdeburg on behalf of the Federal Environment Agency: Brown coal opencast mining lakes in Germany , final report, 1996, p. 519
- ↑ Upper, Middle and Lower Lake Nature Reserve in the Ville-Seenkette , LANUV website, accessed on June 23, 2019.
- ↑ Mittelsee water profile, website anglermap.de, accessed on June 23, 2019.
- ↑ Mittelsee , website monsterfisch.de, accessed on June 23, 2019.