Red (Murg)
red | ||
Rot near Walliswil (Murgenthal municipality, Aargau) |
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Data | ||
Water code | CH : 519 | |
location |
Mittelland
|
|
River system | Rhine | |
Drain over | Murg → Aare → Rhine → North Sea | |
source | in the east of the municipality of Gondiswil 47 ° 8 ′ 8 ″ N , 7 ° 53 ′ 21 ″ E |
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Source height | 710 m above sea level M. | |
confluence | with the Langete to Murg Coordinates: 47 ° 15 ′ 5 ″ N , 7 ° 49 ′ 35 ″ E ; CH1903: 629 363 / 233443 47 ° 15 '5 " N , 7 ° 49' 35" O |
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Mouth height | 420 m above sea level M. | |
Height difference | 290 m | |
Bottom slope | 17 ‰ | |
length | 17 km | |
Catchment area | 46.1 km² | |
Discharge A Eo : 46.1 km² at the mouth |
MQ Mq |
790 l / s 17.1 l / (s km²) |
Left tributaries | Melchnauer Dorfbach | |
Right tributaries | Fischbach, Stempech, Groppebach | |
Communities | Grossdietwil , Altbüron , St. Urban , Roggwil | |
Residents in the catchment area | 5524 (1990) |
The Rot (formerly also Roth ) is a 17 km long stream in the border area of the three cantons of Bern, Lucerne and Aargau. It is the right and south-southeastern headwaters of the Murg .
geography
course
The Rot rises east of the municipality of Gondiswil , flows past Grossdietwil and Altbüron to St. Urban and joins the Langete at Roggwil ; from there to the confluence with the Aare the water is called Murg .
Almost its entire length of 17 km forms the border between the canton of Bern and the cantons of Lucerne and Aargau .
Hydrology
The runoff of the Rot at the Roggwil measuring station is a long-term mean of 0.89 m³ / s. The mean monthly discharge fluctuates between 0.6 m³ / s in August and 1.16 m³ / s in March. Over 40 m³ / s were measured during floods.
The brook muddles strongly and together with the water ditches (side canals) forms a strongly branched water network.
The catchment area has an area of 46.1 km²; 66% of it is used for agriculture; 27% are covered by forest and wood, 7% are built over.
nature and environment
Wastewater treatment
The municipalities in the catchment area of the Rot are connected to the WWTP Murg bei Wynau by a collecting canal , which uses the Aare as a strong receiving water. The wastewater treatment plant is supported by a special purpose association made up of 12 municipalities and has been in operation since 1979.
Water mats
The valley landscape of the Rot is characterized by the water mats, which give it a permanently green and richly structured appearance. The cultivated landscape created by meadow irrigation was registered in 1983 as object no. In 1312 included in the federal inventory of landscapes and natural monuments of national importance .
The protection and preservation of the Wässermatten tradition in the Rottal are regulated in a similar way to the Langete : the managers have asked the Wässermatten Foundation (in which the Canton of Lucerne has also been involved since 1994) to cultivate grass with irrigation as well as to renew and maintain it Water systems obligated; In return, the foundation will compensate them for additional work and reduced income.
biology
Long stretches of the red are lined with wood on the banks. Together with the water mats, it forms a natural habitat that is characterized by a high level of biodiversity . A total of 21 species of locusts have been recorded in the Rottal; including the endangered marsh insect .
The fish stock in the Rot consists mainly of brown trout ; But bullheads and rarer species such as the brook lamprey also occur. The once widespread otter has disappeared from the Rottal, beavers are returning. Also clawed crayfish , grass and water frogs return gradually; their catch was still practiced commercially in the 19th century.
The “Lebendiges Rottal” association is reviving the tradition of carp farming in the Rottal , which was founded by the Cistercians of the St. Urban monastery . On his initiative, the “Äschweiher”, a carp pond near Ludligen an der Rot , was created in 2004. In addition to the pond, several small bodies of water were created for amphibians.
Web links
- Max Jufer: Langeten. In: Historical Lexicon of Switzerland .
- Data from the hydrological measuring station Roggwil, Buechägerten
- Website of the association lively Rottal
- Project carp pure nature
Individual evidence
- ↑ a b c Geoserver of the Swiss Federal Administration ( information )
- ↑ a b c Topographical catchment areas of Swiss waters: area outlets. Retrieved May 26, 2019 .
- ↑ V. Binggeli / M. Ischi: The Wässermatten-Schutzgebiet von Altbüron. In: Jahrbuch des Oberaargaus No. 38, 1995, pp. 123–146.
- ↑ P. Barrier: Ecological studies on grasshoppers of the Rottal. In: Jahrbuch des Oberaargaus No. 38, 1995, pp. 93–122.