Mettmenhaslisee
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Mettmenhaslisee Haslisee, Näppi, Mettmenhasler See |
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| Geographical location | Canton Zurich | |
| Drain | Seegraben → Haslibach → Fischbach → Glatt | |
| Places on the shore | Niederhasli | |
| Data | ||
| Coordinates | 679 381 / 258.69 thousand | |
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| Altitude above sea level | 418 m above sea level M. | |
| surface | 2.5 ha | |
| volume | 162,000 m³ | |
| Maximum depth | 12.4 | |
| Middle deep | 6.5 | |
| Catchment area | 41.1 ha | |
The Mettmenhaslisee (also Haslisee or locally Näppi ) is a tote lake in the municipality of Niederhasli in the Glatttal region in the Zurich Unterland .
geography
The at 418 m above sea level. M. located lake lies in a shallow depression , which is surrounded by wooded hills. It is located south of the village of Niederhasli and a little northwest of the hamlet of Oberhasli . In the southwest, the hamlet of Mettmenhasli extends almost to the lake shore.
The Mettmenhaslisee lies in the Mettmenhasler See nature reserve, which was designated in 1991 . The Seeriet , bordering on the north and partly on the east bank, the silting area of the lake, is home to raised and transitional bogs as well as flat bogs of national importance.
Catchment area
The lake has a catchment area of 0.41 km², which consists of 36% agricultural area, 16% settlement area, 9% water and unproductive area as well as 8% forest. It drains with an average of 9.5 l / s into the Seegraben, which drains via the Haslibach and Fischbach into the Glatt . The retention time of the lake water is about 180 days
history
Between 1939 and 1945, during the Second World War , peat was extracted from the Mettmenhaslisee. On October 19, 1946, the lake and the surrounding area were placed under protection by a council resolution.
In the 1950s, the groundwater level was lowered for the construction of the Rümlang tank system , which caused the lake level to drop by 5 to 6 centimeters.
use
The lake is a popular local recreation area. The Haslisee resort, which was renovated in 1974, has a cloakroom, sanitary facilities, a kiosk, two diving boards, a children's pool and a raft in the middle of the lake. It is also popular among fishermen, so that a maximum of seven fishing patents awarded annually are raffled off. It is also approved for ice skating in severe winters, most recently in 2012.
flora
The most of a light gray lake marl -covered lake bottom layer is the less deep places of curly pondweed , waterweed , sizzles milfoil and water hoses populated. The deep spots are populated by chandelier algae , which contribute to the elevation of the sea bed through calcium excretion and gyttja formation .
In 1908, Gerold Stahel transferred specimens of the rare waterfall from a pond near Lake Constance to the Mettmenhaslisee. The stock was only rediscovered in 1945, and offshoots were later planted in the Mägestlenweiher near Hettlingen . To date, these are the only two locations in Switzerland. The species has become extinct in the neighboring states.
Web links
Individual evidence
- ↑ a b c d e f g h Office for Waste, Water, Energy and Air, Department of Water Protection
- ^ Geographic information system of the Canton of Zurich
- ↑ a b Natural Research Society in Zurich
- ↑ Seebad Haslisee on Badi-Info
- ↑ Niederhasli community
- ^ The national data and information center for the Swiss flora: Leaflet Aldrovanda vesiculosa