Magelungen
| Magelungen | |
|---|---|
 |
|
| Location | /Huddinge, |
| Coordinates | 59°13′51″N 18°5′19″E / 59.23083°N 18.08861°ECoordinates: 59°13′51″N 18°5′19″E / 59.23083°N 18.08861°E |
| Primary inflows | Magelungsdiket. Kräppladiket, Djupån, stormwater |
| Primary outflows | Forsån, Drevviken |
| Catchment area | 1,907 ha (4,710 acres) |
| Basin countries | Sweden |
| Surface area | 245 ha (610 acres) |
| Average depth | 5.0 m (16.4 ft) |
| Max. depth | 13.7 m (45 ft) |
| Water volume | 11,600,000 m3 (9,400 acre·ft) |
| Residence time | 4-5 months |
| Settlements | |
| References | |
Magelungen is one of the biggest lakes in , Sweden, located between the municipalities of Stockholm and Huddinge. It is considered as of great recreational value and is popular for bathing, yachting, and fishing in summers, and tour skating in winters. It is bordering two nature reserves: Fagersjöskogen/Farstanäset and Rågsved Open-Air Area.
Less than half of the catchment area is composed of forest and open grasslands. Some 10 per cent is wetlands and parks, and the remaining area is covered by one-family houses and blocks of flats. Two bridges cross the lake; several major roads pass through the catchment area, as do the above ground tracks of the metro and suburban railway. South of the lake is a larger continuous forest, a golf course, and an open-air centre. Besides the nature reserve, areas on the northern side are used for riding and Allotment-gardens.
The primary catchment area is relatively small and composed of three ditches — Magelungsdiket, Kräppladiket, and Djupån — together contributing about 3 million cubic metres annually. Stormwater is brought to the lake via a great number of pipes together bringing about 10 million cubic metre. The remaining catchment area brings less than 1 million cubic metres annually.
Most of the phosphorus discharged into the lake, totalling 1,800 kg/year, is brought from the lake Ågestasjön (~1,000 kg) through the Norrån river, while the primary catchment area brings some 500 kg. Of the 25 tons of nitrogen brought annually to the lake, about 18 tons comes from Norrån and some 6 tons from the primary catchment area. The deepest south-eastern part of the lake suffers from oxygen deficiency and hydrogen sulphide which causes high levels of phosphorus. Most of the zinc and copper comes from roofs, while high levels of metals have been reported in stormwater from a local industrial area.
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Wikipedia