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Bridge over the Möhlinbach in Möhlin

Bridge over the Möhlinbach in Möhlin

Water code CH : 511
location Canton Aargau , Rheinfelden District , Switzerland
River system Rhine
Drain over Rhine  → North Sea
source between Wegenstetten and Hemmiken in the "Wockermatt" area ( Tafeljura )
47 ° 29 ′ 11 ″  N , 7 ° 54 ′ 16 ″  E
Source height 518  m above sea level M.
muzzle in Möhlin in the Upper Rhine Coordinates: 47 ° 34 '53 "  N , 7 ° 50' 15"  E ; CH1903:  630005  /  270168 47 ° 34 '53 "  N , 7 ° 50' 15"  O
Mouth height 281  m above sea level M.
Height difference 237 m
Bottom slope 16 ‰
length 15 km
Catchment area 37.3 km²
Outflow at the Zeiningen gauge MQ
HHQ (1999)
520 l / s
15.9 m³ / s
Left tributaries Talbach, Reckendalbach
Right tributaries Lampertbach
Communities Wegenstetten , Hellikon , Zuzgen , Zeiningen , Möhlin
Residents in the catchment area 15000

The Möhlinbach is a 16 kilometer long stream in the canton of Aargau in Switzerland . It is a left tributary of the Rhine and drains the Möhlintal in the western part of the Fricktal . The stream has a catchment area of ​​26.6 km². The largest town on the stream is Möhlin .

The stream rises on a pass between the communities of Wegenstetten and Hemmiken at around 520  m above sea level. M. in the Wockermatt area , in the middle of the Table Jura . On his way to Wegenstetten he takes in several streams that arise on the western flank of the Tiersteinberg. In Wegenstetten at around 438  m above sea level. M. the stream changes its direction from northeast to northwest. It then flows through the villages of Hellikon , Zuzgen and Zeiningen .

The Möhlinbach receives further tributaries from the side valleys such as the Talbach in Hellikon, the Gassenbach in Zuzgen and the Maienbächli in Zeiningen. Below Niederhofen near Zuzgen, an artificially created side canal branches off the Möhlinbach and flows back into the creek immediately after a former mill. Another side canal branches off at the upper entrance to Zeiningen. The approximately 750 meter long canal flows through several basins of a trout farm and then flows back into the Möhlinbach.

Water flow rate in m³ / s
Zeiningen hydrometric measuring station
Period average 1982-2005: 0.52
Biggest annual mean: 0.73 (1999)
Maximum (peak): 15.9 (1999)
Smallest annual mean: 0.33 (1989)
Minimum ( daily average ): 0.12 (1989/1992)

A hydrometric measuring station is located in the center of Zeiningen, between the middle and lower stream courses . The mean flow rate measured there is around 0.5 m³ / s in the long-term period mean. In the flood year of 1999, the Möhlinbach carried almost 16 m³ / s around 30 times more water than the period average. This caused considerable damage to cultivated land and to buildings near the creek.

At the exit of Zeiningen the Möhlintal opens completely and the brook enters the wide Rhine plain . During the Riss glaciation, the glaciation reached exactly into what is now the center of Möhlin , where it formed a pronounced, kilometer-long terminal moraine . With the melting of the glaciers, the Möhlinbach broke through the terminal moraine at this point, resulting in terraces with a height difference of up to 50 meters. These geologically interesting terraces are unique in the region and characteristic of Möhlin.

At the upper entrance to Möhlin, the Möhlinbach flows directly under a sawmill. The power of flowing water was used here until the last century to drive a saw. From the built-up area of ​​Möhlin, the stream continues to flow mostly canalised but still open. In Obermöhlin , a mill used to be powered by another canal. The Möhlinbach in the center of Möhlin was only recently partially renatured. After the stream has passed Sonnenpark and Möhliner Allmend , it crosses under the Basel - Zurich railway line . Then it flows straightened, canalized and partly underground through Riburg . Further north, the stream runs between the swimming pool and the campsite and flows through the Bachtalen nature reserve . Finally, it flows into the dammed Upper Rhine just above the Ryburg-Schwörstadt power plant at an altitude of 280  m .

Individual evidence

  1. a b c Geoserver of the Swiss Federal Administration ( information )
  2. Modeled mean annual discharge. In: Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved May 30, 2019 .
  3. Rheinfelden measuring station. In: Canton Aargau Department of Construction, Transport and Environment. Retrieved October 19, 2015 .