Rigiaa

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Rigiaa
Rigi-Aa
View from Rigi Kulm to the area where the Rigiaa flows into Lake Zug. In the background the Lauerzersee outside the Rigiaa catchment area.

View from Rigi Kulm to the area where the Rigiaa flows into Lake Zug. In the background the Lauerzersee outside the Rigiaa catchment area.

Data
Water code CH : 742
location Mittelland

Switzerland

River system Rhine
Drain over Lorze  → Reuss  → Rhine  → North Sea
source near Rigi Staffel
47 ° 3 ′ 12 ″  N , 8 ° 28 ′ 33 ″  E
Source height approx.  1590  m above sea level M.
muzzle in Arth in the Zugersee Coordinates: 47 ° 4 ′ 7 "  N , 8 ° 31 ′ 32"  E ; CH1903:  682 555  /  213 646 47 ° 4 '7 "  N , 8 ° 31' 32"  O
Mouth height 414  m above sea level M.
Height difference approx. 1176 m
Bottom slope approx. 11%
length approx. 11 km
Catchment area 17.91 km²
Discharge
A Eo : 17.91 km²
at the mouth 		MQ
Mq
 		780 l / s
43.6 l / (s km²)

The Rigiaa is an approximately 11 km long tributary of the Lorze , which drains a large part of the Rigi in the Schwyz canton part and flows into Lake Zug .

geography

course

The Rigiaa rises near the Rigi Staffel train station at around 1590  m above sea level. M. between Rigi Rotstock and Rigi Kulm.

It flows through the valley through which the Rigibahn travels from Goldau to the Rigi. In the valley it flows between Rigi and Rossberg through the villages of the municipality of Arth .

Your path leads first through Goldau, then to Oberarth , to Arth at about 414  m above sea level. M. to flow into Lake Zug .

Its 11 km long run ends about 1176 meters below its source, so it has a mean bed gradient of about 11 ‰.

Catchment area

The catchment area of ​​the brook has a size of almost 18 km², with the highest point in the Rigi Kulm catchment area at almost 1800  m above sea level. M. lies. The mean height is 992  m above sea level. M. and the minimum height 413  m above sea level. M.

In addition to the Rigi, some slopes of the Rossberg are also drained from the Rigiaa via the Lorze, the Reuss and the Rhine to the North Sea.

The catchment area of ​​the Rigiaa consists of 37.5% wooded area , 49.4% agricultural area , 9.9% settlement area , 0.7% water area and 2.5% unproductive areas.

Tributaries

Inflows from the source to the mouth with name, orographic direction , length in kilometers, catchment area in km², mouth location, mouth height. The names of the streams come from the WebGIS of Canton Schwyz, the data from swisstopo .

  • Sandbach ( left ), 1.2 km, southeast of the Sandhütte , 1253.3  m above sea level. M.
  • Dossenbach ( right ), 1.6 km, 0.58 km², southwest of the Malchus Chapel , 1175.3  m above sea level. M.
  • Rothenfluhbach ( right ), 1.8 km, 1.62 km², 949.6  m above sea level. M.
  • Schuttbach ( right ), 3.3 km, 2.15 km², in Goldau, 489.6  m above sea level. M.
  • Kienbach ( right ), 3.0 km, 1.2 km², in Rischi, 464.8  m above sea level. M.

Hydrology

At the confluence of the Rigiaa with Lake Zug, its modeled mean flow rate (MQ) is 780 l / s. Her discharge regime type is nivo-pluvial préalpin and her discharge variability is 20.

The modeled monthly mean discharge (MQ) of the Rigiaa in l / s

Individual evidence

  1. ↑ a b c Geoserver of the Swiss Federal Administration ( information )
  2. ↑ a b c d Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved January 19, 2020 .
  3. ↑ "Hidden behind the mean values" - the variability of the discharge regime , p. 119
  4. ↑ The discharge variability describes the extent of the fluctuations in the mean discharge of individual years around the long-term mean discharge value.

Web links