Aabach (Greifensee)

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Aabach
upper course name: Alaubach
Mönchaltorfer Aa shortly before the confluence with the Greifensee

Mönchaltorfer Aa shortly before the confluence with the Greifensee

Data
Water code CH : 611
location Switzerland
River system Rhine
Drain over Glatt  → Rhine  → North Sea
source in Feissiholz near Herschmettlen
47 ° 16 ′ 52 ″  N , 8 ° 48 ′ 27 ″  E
Source height 533  m above sea level M.
muzzle between Rällikon and Riedikon in the Greifensee Coordinates: 47 ° 19 ′ 33 "  N , 8 ° 42 ′ 2"  E ; CH1903:  695 391  /  242 435 47 ° 19 '33 "  N , 8 ° 42' 2"  O
Mouth height 435  m above sea level M.
Height difference 98 m
Bottom slope 8.8 ‰
length 11.2 km
Catchment area 51.14 km²
Discharge at the Mönchaltorf
A Eo gauge : 46 km²
Location: 2.4 km above the mouth 		NNQ (1998)
MQ 1980–2016
Mq 1980–2016
 HHQ (2007) 		77 l / s
1.05 m³ / s
22.8 l / (s km²)
 50.5 m³ / s
Communities Grüningen , Bubikon , Gossau , Mönchaltorf , Uster

The Aabach ( also called Mönchaltorfer Aa to distinguish it from the Ustermer Aa of the same name ) is a non-navigable small river in the canton of Zurich . At 11.2 kilometers, it is one of the two main tributaries of the Greifensee, alongside the Ustermer Aa . The Mönchaltorfer Aa rises at a height of 533  m in Feissiholz near Herschmettlen near Bubikon . The brook flows on its way to the northwest through Grüningen and Mönchaltorf and then flows into the Greifensee. At the lower reaches of the Mönchaltorfer Aa forms the border between the municipality of Mönchaltorf and Uster .

In its confluence with the Greifensee, the Aabach forms a spacious delta. A moor overgrown with reeds extends in this area, which extends from Riedikon in the east to the Egg bathing establishment in the west and houses a nature and bird reserve as well as the "Silberweide nature station". Numerous native amphibians and birds can be found here. Among other things, white storks nest in the Aabach delta .

See also

List of waters named Aa

Web links

Commons : Mönchaltorfer Aa  - Collection of images, videos and audio files

Individual evidence

  1. ↑ a b Geoserver of the Swiss Federal Administration ( information )
  2. ↑ Hydrological Atlas of Switzerland of the Federal Office for the Environment FOEN, Table_13
  3. ↑ Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved September 8, 2017 .
  4. ↑ Aabach-Mönchaltorf 1980–2016. (PDF) Position 527: monthly samples. In: Office for Waste, Water, Energy and Air, Department of Water Protection. Retrieved August 9, 2017 .
  5. ↑ Archive link ( Memento from August 1, 2015 in the Internet Archive )