Aabach (Seetal)

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Hallwiler Aa
Aabach below Hallwyl Castle after its outflow from the Hallwilersee

Aabach below Hallwyl Castle after its outflow from the Hallwilersee

Water code CH : 680
location Mittelland


River system Rhine
Drain over Aare  → Rhine  → North Sea
source Baldeggersee
47 ° 13 ′ 0 ″  N , 8 ° 15 ′ 3 ″  E
Source height 463  m above sea level M.
muzzle in Wildegg in the Aare Coordinates: 47 ° 25 '4 "  N , 8 ° 9' 43"  E ; CH1903:  654 587  /  252125 47 ° 25 '4 "  N , 8 ° 9' 43"  O
Mouth height 348  m above sea level M.
Height difference 115 m
Bottom slope approx. 2.9 ‰
length approx. 39 km (including the source stream Ron )
Catchment area 302.7 km²
A Eo : 302.7 km²
at the mouth
5.21 m³ / s
17.2 l / (s km²)
Right tributaries Bünz
Flowing lakes Hallwilersee
Small towns Lenzburg

The Aabach is a brook in the Swiss cantons of Lucerne and Aargau , which belongs to the Aare catchment area and flows from south to north through the Seetal .



It rises in Baldeggersee , which is fed by several short streams next to the Ron . At Mosen the stream flows into the Hallwilersee . It emerges from the lake again between Boniswil and Seengen . Hallwyl Castle , one of the most important moated castles in Switzerland , is located around 700 meters from the northern end of the lake on two artificial islands . On the southern outskirts of Lenzburg , an underground relief tunnel branches off, which meets the brook again below Niederlenz ; The excess amount of water is channeled through this during flooding. The Aabach flows into the Aare in Wildegg , shortly after the Bünz flows into the Aabach almost two hundred meters before it.

Catchment area

The 302.7 km² catchment area of ​​the Aabach lies in the Seetal and is drained through it via the Aare and the Rhine to the North Sea.

It consists of 22.6% wooded area , 56.9% agricultural area , 14.8% settlement area and 5.7% unproductive areas.

The area distribution

The mean height of the catchment area is 543.3  m above sea level. M. , the minimum height is 253  m above sea level. M. and the maximum height at 876  m above sea level. M.

Tributaries and lakes

From the origin to the mouth. Selection.

See also

Web links

Commons : Aabach  - collection of images, videos and audio files

Individual evidence

  1. a b c Geoserver of the Swiss Federal Administration ( information )
  2. a b Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved June 8, 2019 .
  3. Topographic catchment areas of Swiss waters: Aabach , Federal Office for the Environment FOEN