Wildbach (Ustermer Aa)

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Torrent
The torrent in Wetzikon

The torrent in Wetzikon

Data
Water code CH : 637
location Mittelland

Switzerland

River system Rhine
Drain over Ustermer Aa  → Glatt  → Rhine  → North Sea
Headwaters am Allmen near Girenbad
47 ° 18 ′ 50 ″  N , 8 ° 53 ′ 13 ″  E
Source height 1035  m above sea level M.
muzzle near Medikon in the municipality of Wetzikon Coordinates: 47 ° 19 '32 "  N , 8 ° 47' 2"  E ; CH1903:  701 681  /  242504 47 ° 19 '32 "  N , 8 ° 47' 2"  O
Mouth height 520  m above sea level M.
Height difference 515 m
Bottom slope 52 ‰
length 9.9 km
Catchment area 20.5 km²
Discharge at the Wetzikon
A Eo gauge : 20.5 km² 		NNQ (1962)
MQ 1951–2013
Mq 1951–2013
 HHQ (1984) 		4 l / s
538 l / s
26.2 l / (s km²)
 44.3 m³ / s
Left tributaries Schaugenbach, Fischbach, Mostbach
Right tributaries Ringwilerbach, Schwarzbach, Gigerbach, Schlossbach
Communities Hinwil , Wetzikon

The torrent is a 10 km long left tributary of the Ustermer Aa in the Hinwil district in the Swiss canton of Zurich . It drains 20.5 square kilometers of the Zurich Oberland in the communities of Hinwil and Wetzikon . The stream is the longest and with an average discharge of 538 l / s also the most water-rich tributary of the Ustermer Aa.

It should not be confused with the torrent of roughly the same length , which also runs in the canton of Zurich and flows into the Töss near Rorbas .

geography

course

The torrent rises at 1035  m above sea level. M. in a forest area north of the Bachtels on the western slope of the Allmen ( 1076  m above sea level ), which here delimits the catchment areas of Glatt and Töss, above the Hinwiler Aussenwacht Girenbad . Initially it flows mainly westwards and a little later takes on the Hörnliholzbach, which rises from the Hörnli, from the left . It leaves the forest area at Boden and now flows through Gerenbad, where it takes up the Badwisenbächli and the Girenbadbächli .

It now enters a forest again and flows through the Wildbachtobel (also called Falätschentobel ) after the confluence of the Schaugenbach, the most important tributary in the upper reaches . After passing the Bernegg ruins , the Oberberneggbach flows into the ravine from the left, and a little later from the right, the Ringwilerbach, which comes from the Ringwiler Weiher .

From its confluence, it makes a curve to the south, takes on the Fischbach and enters the Hinwil settlement area. Here, before taking up the Baderbächli, it changes its course again and now runs north-west.

It now touches the industrial area of ​​Hinwil, where it includes the Schwarzbach and the Brunnenbach and now runs lined with fields in the direction of Wetzikon. Here it passes the Grosswies retention basin , which was built in 2000 , where it absorbs the water from the Gigerbach and a little later that from the Mostbach .

It now reaches the urban area of ​​Wetzikon, where the Schlossbach , the longest and most water-rich tributary, flows into the torrent. At Medikon it finally empties itself at 520  m above sea level. M. from the left into the Ustermer Aa coming from the Pfäffikersee , here turning to the west.

Tributaries

  • left arm ( left )
  • left lateral arm II ( left )
  • Hörnliholzbach ( left ), 0.4 km
  • Badwisenbächli ( right ), 0.9 km
  • Girenbadbächli ( right ), 0.6 km
  • Schaugenbach ( left ), 1.5 km
  • Oberberneggbach ( left ), 0.9 km
  • Ringwilerbach ( right ), 1.4 km, 1.49 km²
  • Unterberneggbach ( left ), 0.5 km
  • Fischbach ( left ), 2.4 km, 0.83 km²
  • Tobelweidbach ( right ), 0.4 km
  • Baderbächli ( right ), 0.4 km
  • Haldenbächli ( right ), 0.9 km
  • Schwarzbach ( right ), 2.3 km
  • Brunnenbach ( left ), 1.5 km
  • Gigerbach ( right ), 3.1 km, 2.01 km²
  • Mostbach ( left ), 2.6 km, 3.51 km²
  • Schlossbach ( right ), 1.6 km (with Ländebach 4.9 km)

swell

Individual evidence

  1. ↑ a b Geoserver of the Swiss Federal Administration ( information )
  2. ^ Individual references to the geographic information system of the Canton of Zurich
  3. ↑ a b Wildbach-Wetzikon. (PDF) Position 526: monthly samples. In: Office for Waste, Water, Energy and Air, Department of Water Protection. Retrieved October 9, 2015 .