Grimnitzsee
| Grimnitzsee | ||
|---|---|---|
|
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| Grimnitzsee from west northwest | ||
| Geographical location | Barnim district | |
| Tributaries | Joachimsthaler Hauptgraben | |
| Drain | New ditch to the Werbellinsee | |
| Places on the shore | Joachimsthal , Althüttendorf | |
| Data | ||
| Coordinates | 52 ° 58 '44 " N , 13 ° 47' 8" E | |
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| Altitude above sea level | 64 m above sea level NHN | |
| surface | 7.83 km² | |
| volume | 35 million m³ | |
| Maximum depth | 10.3 m | |
| Middle deep | 4.5 m | |
| PH value | 8.4 | |
| Catchment area | 34 km², 49.6 km² | |
The Grimnitzsee in the northern district of Barnim near Joachimsthal is a large, shallow ground moraine lake . It was formed as a tongue basin lake in the Glacial Vistula .
Natural location and development
The lake is located on the eastern edge of the Schorfheide north of the ice edge of the Pomerania phase of the Vistula glacial period and was carved out by a glacier tongue of the inland ice. It is a lime-rich, unstratified lake with a relatively small catchment area. It has an area of 7.83 km², is ten meters deep at its deepest point and is 64 m above sea level. NHN . It is only fed by springs, rainwater, the Dovinsee and the Joachimsthaler Hauptgraben. The lake has no natural drainage. In the 17th century it was connected to the Werbellinsee by the Neuer Graben to supply the first Finow Canal with water . The ditch still serves to supply water to the Havel-Oder waterway today . It is unclear whether the Grimnitzsee was originally the source lake for the catfish .
The lake is located in the Schorfheide-Chorin Biosphere Reserve .
etymology
The name of the lake is derived from the Old Polish “Grimnica” (from “grim-”; German: “shrub”, “garden”).
Water condition
Eutrophication led to a decline in underwater vegetation as early as the 1930s. From the 1960s onwards, intensive carp farming in the water and a duck fattening facility on the north bank also increased nutrient inputs. By the early 1970s, the macrophyte vegetation in the lake had completely disappeared. By stopping fish and duck fattening and improving wastewater disposal and treatment, the water quality of the Grimnitzsee was then significantly improved. In the early 1990s, the underwater plants slowly returned and now colonize the sea floor to a depth of three meters.
The profile according to the EU Water Framework Directive certifies the Grimnitzsee 2017 an ecological status of 4 (= "unsatisfactory status"; environmental target of the WFD is clearly missed) on a five-point scale. The quality components macrophytes / diatoms and phytoplankton also have a value of 4. The chemical status is rated with 3 (= "moderate status"; environmental target of the WFD is just missed). The LAWA trophy index was 2.6 in 2016. This made the lake weakly eutrophic .
The bathing water quality of Grimnitzsees is classified as "excellent" in almost all Brandenburg Lakes, through the Environmental Agency as. However, there is a risk of developing bathing dermatitis.
See also
Individual evidence
- ↑ a b c d e f g Bathing water profile according to Article 6 of Directive 2006/7 / EC and Section 6 of the Ordinance on the Quality and Management of Bathing Water of February 6, 2008 (BbgBadV) . Ministry of Justice and for Europe and Consumer Protection of the State of Brandenburg, updated on January 15, 2018, accessed on August 27, 2018.
- ↑ a b Profile of Lakes EC Water Framework Directive: Grimnitzsee . (PDF; 680 kB), State Office for the Environment Brandenburg , Section W14, as of October 10, 2017.
- ↑ a b Brigitte Nixdorf, Mike Hemm, Anja Hoffmann, Peggy Richter: Documentation of the condition and development of the most important lakes in Germany. Part 5: Brandenburg (PDF; 1.9 MB). Environmental research plan of the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety, final report, 2003.
- ↑ Profile The catfish . State Office for the Environment Brandenburg , Department of Water Management, updated May 4, 2015, accessed on August 27, 2018.
- ^ Albrecht Greule : German book of water names: Etymology of water names and the associated area, settlement and field names . de Gruyter, Berlin 2014, ISBN 978-3-11-033859-1 , p. 190 f . ( limited preview in Google Book search).
- ↑ List of bathing spots