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Neumagen with cast iron bridge in Staufen

Neumagen with cast iron bridge in Staufen

Data
Water code DE : 23364
location Baden-Württemberg
River system Rhine
Drain over Möhlin  → Rhine  → North Sea
Headwaters At the hamlet of Stohren in the Münstertal area,
47 ° 53 '33 "  N , 7 ° 53' 19"  E
Source height 1148  m above sea level NHN
muzzle Between Biengen and Hausen an der Möhlin in the Möhlin coordinates: 47 ° 56 '58 "  N , 7 ° 40' 21"  E 47 ° 56 '58 "  N , 7 ° 40' 21"  E
Mouth height 205  m above sea level NHN
Height difference 943 m
Bottom slope 36 ‰
length 25.9 km
Catchment area 84.1 km²
Discharge at gauge Untermünstertal
A Eo : 66.29 km²
Location: 13.62 km above the mouth
NNQ (08/27/2003)
MNQ
MQ
Mq
MHQ
120 l / s
310 l / s
1.72 m³ / s
25.9 l / (s km²)
19.8 m³ / s
Discharge  at the mouth of the
A Eo : 84.1 km²
MNQ
MQ
Mq
MHQ
348 l / s
1.88 m³ / s
22.4 l / (s km²)
21.8 m³ / s

The Neumagen is an approximately 26 kilometer long tributary of the Möhlin in the Breisgau-Hochschwarzwald district . The total gradient from its highest springs to the mouth is a good 1000 meters. Of the rivers on the western side of the southern Black Forest, it has the highest gradient.

Surname

The name is like that of Nijmegen ( lat. Ulpia Noviomagus Batavorum) of Celtic origin. It goes back to the Celtic word magos for "field", "level" and the Celtic adjective novios for new . The ending was romanized from -os to -us. Various Roman settlement sites are archaeologically documented on the lower reaches of the Neumagen.

Course and valley landscape

Upper course in the Stohrental

The valley of the Neumagen in the Black Forest is called Münstertal and is the name giver for today's municipality Münstertal / Black Forest .

The Neumagen rises southwest of the Schauinsland in high meadow valleys near the hamlet of Stohren and then, initially falling down steep, wooded notches, takes a generally southwestern direction. From the confluence of the hardly smaller Hörhalderbach, the stream flows through a wider valley floor with meadows. At the mouth of the, again, hardly smaller, Stampfebach from the south at Spielweg ("Wegegabel") the valley meets the more densely populated Obermünstertal valley . With this, the Neumagen reaches the Untermünstertal valley below the St. Trudpert Monastery at the site of the former mining town of Münster and with it the Talbach, which is almost on a par with it. It falls down from the north-eastern slopes of the Belchen massif , which towers up to 1000 meters . The wide valley, which now faces north-west, is conspicuously straightforward for the next 5 kilometers and emerges from the small town of Staufen im Breisgau on the Rhine plain . The bottom of the valley turns into an extensive alluvial fan that the river has poured over the low hills of the foothills and into the Rhine plain.

The bed of the Neumagen has been straightened up to the confluence with the Möhlin in the area of ​​the municipality of Bad Krozingen since the 18th century, initially caused by rafting , which can be proven between 1708 and 1748 , later mainly to protect against flooding. The former stream channels of the river, as well as today's bed with their wooded borders, structure the spacious plain, which is characterized by arable land.

Uses

Today's idyllic course in the Münstertal hardly shows how much the water power of the Neumagen was already used in the Middle Ages through side channels for mining and processing the ore . As a result of this use, sediments or soils washed up by the river today have an increased concentration of heavy metals .

In the area of ​​the city of Staufen , the construction of a hydropower plant is planned, which will tie in with the medieval and modern use (commercial canal in Staufen with formerly numerous water mills ) of the river.

Water flow and drainage features

Confluence of the Möhlin (left) and Neumagen

The Neumagen reaches the Möhlin after branching and with reduced water flow due to the seepage losses (particularly visible in summer) into the sandy-gravelly subsoil of its alluvial fan. The Möhlin thus appeared before the canalization despite its much lower water flow than the main river , especially since its previously seeped water from the Neumagen enters at the foot of the Neumagen alluvial fan. The Neumagen has an average water flow of 1.88 m³ / s at the mouth, the Möhlin one of 0.85 m³ / s.

Due to the seepage in the gravel of the wide valley floor and especially in the Upper Rhine Plain, the summer low water flow can be extremely low (down to 0.1 m³ / s) in the Lower Münster valley; From Oberkrozingen it can dry out completely as in 1976, 1983, 1989, 1990, 2003, 2011, 2015 and 2018. On the other hand, due to the low storage capacity of the mountain soils and the steepness of the slopes in its catchment area after thunderstorms or in the In connection with the snowmelt, flooding the banks dangerously quickly.

See also

  • Dreisam (north-facing, roughly parallel Black Forest river)
  • Klemmbach (flowing water to the south)

Web links

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

Individual evidence

  1. a b Digital terrain model at the State Institute for the Environment Baden-Württemberg (LUBW) ( information )
  2. ^ Layer water network at the State Agency for the Environment Baden-Württemberg (LUBW) ( information )
  3. a b c d MNQ according to flood forecast center , State Institute for the Environment Baden-Württemberg.
    Other values ​​from regionalization, see Abfluss-BW - a data and map service of the State Agency for the Environment Baden-Württemberg ( information ). As of March 1, 2016 (MQ, MNQ), March 1, 2007 (MHQ estuary) and December 3, 2013 (MHQ level)
  4. ^ Whitley Stokes : Urkeltischer Sprachschatz , translated and edited by Adalbert Bezzenberger , Göttingen 1894 online (reprint 1979: ISBN 978-3-525-26404-1 ), page 195: novio-s , page 198 f .: magos-
  5. Korinna Thiem: The historical landscape analysis as a method for river assessment using the example of the Münstertal in the Black Forest / , dissertation, Institute for Land Care, Freiburg im Breisgau 2006, ISBN 3-933390-33-8
  6. Badische Zeitung, August 3, 2018 online