Radolfzeller Aach
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Radolfzeller Aach Old name: Murg |
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_01_ies.jpg) Mühlkanal of the Radolfzeller Aach in Singen (Hohentwiel) |
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| Data | ||
| Water code | EN : 2172 | |
| location | District of Konstanz , Baden-Württemberg , Germany | |
| River system | Rhine | |
| Drain over | Rhine → North Sea | |
| source |
Aachtopf at Aach 47 ° 50 ′ 48 ″ N , 8 ° 51 ′ 29 ″ E |
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| Source height | 475 m above sea level NN | |
| Spring discharge |
MNQ MQ MHQ |
1.3 m³ / s 8.59 m³ / s 24 m³ / s |
| muzzle | Between Radolfzell on Lake Constance and Moos in the Untersee Coordinates: 47 ° 43 ′ 57 ″ N , 8 ° 56 ′ 28 ″ E 47 ° 43 ′ 57 ″ N , 8 ° 56 ′ 28 ″ E |
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| Mouth height | 395 m above sea level NN | |
| Height difference | 80 m | |
| Bottom slope | 2.5 ‰ | |
| length | 32 km | |
| Catchment area | 261 km² | |
| Discharge at the gauge Rielasingen A Eo : 205 km² Location: 18.7 km above the mouth |
NNQ (09.09.1928) MNQ 1926/2009 MQ 1926/2009 Mq 1926/2009 MHQ 1926/2009 HHQ (07/23/1942) |
1.71 m³ / s 3.81 m³ / s 9.22 m³ / s 45 l / (s km²) 22.8 m³ / s 38.6 m³ / s |
| Discharge at the mouth of the A Eo : 261 km² |
MQ Mq |
9.34 m³ / s 35.8 l / (s km²) |
| Medium-sized cities | Radolfzell , Singen (Hohentwiel) | |
The Radolfzeller Aach (also Hegauer Aach ) is a 32 kilometer long right or northern tributary of the Rhine in the south of Baden-Württemberg ( Germany ). The river rises in Aach at 475 m above sea level. NN located Aachtopf , the largest source of Germany.
Surname
The name Murg can be traced back to the Radolfzeller Aach in the High Middle Ages . This name is completely unknown to the local population today.
geography
Aachtopf
The water of the Aach comes from an 18 m deep underground karst cave and about two thirds comes from the sinking of the Danube between Immendingen and Möhringen as well as near Fridingen .
course
After its origin, it flows through the Hegau and numerous nature reserves as the Hegauer Aach . It flows first in a southerly direction to Singen (Hohentwiel) , where it is crossed by the Scheffel Bridge, then to the east and is called Radolfzeller Aach in its lower reaches . The last six kilometers of the lower course run in the Radolfzeller Aachried nature reserve . With an average discharge rate of ten cubic meters per second, it flows into Lake Constance as the fourth largest inflow . The mouth is located between Radolfzell on Lake Constance and Moos in the north-western part of the Untersee , the Zellersee.
Catchment area
The Radolfzeller Aach drains a catchment area of 261 km². If you add the catchment area of the Danube before the Danube sinking due to the Aachtopf, it drains a catchment area of around 1,560 km² on the days of full infiltration of the Danube.
Hydrology
In earlier times the water power of the fast flowing Radolfzeller Aach was used for many mills . Today there are several hydropower plants on its banks. There are renaturation measures in Beuren an der Aach , for example , where a sediment trap was set up in front of the Singen district to catch the sediments and gravel that the river carries with it. Initial considerations of returning the sediment above Volkertshausen to the river were given up.
fauna
Several threatened water bird species can be found on the Radolfzeller Aach. a. Common sandpipers , wood sandpipers and wood sandpipers . The beaver first settled in the estuary in 1998 after 200 years . Morphologically, the Radolfzeller Aach belongs to the lower trout and grayling region . The main fish species in the Aach is the brown trout, as the grayling is more exposed to the feeding pressure of the large cormorant colony in the Radolfzeller Aachried due to its low shyness . There are also larger stocks of the endangered fish species brook lamprey and bullhead , which live protected on the bottom. Other fish species from Lake Constance are also found in the lower reaches.
Localities
On the Radolfzeller Aach are the villages of Aach , Volkertshausen , Beuren an der Aach , Friedinger Riedmühle, Hausen an der Aach , Singen (Hohentwiel) , Rielasingen-Worblingen , Bohlingen and the Radolfzeller district of Rickelshausen.
water sports
Due to the strong source of the Aach, the Radolfzeller Aach is open to canoes all year round. However, the section Aachbad Singen to Bohlingen is not recommended due to many water drains and heavy industrialization. The lower reaches of the nature reserve are closed to water sports all year round.
Web links
Individual evidence
- ↑ a b Old name based on: Albrecht Greule , Deutsches Gewässernamenbuch , De Gruyter , Berlin, 2014, p. 364.
- ^ German Hydrological Yearbook Rhine Region, Part I 2009 State Institute for Environment, Measurements and Nature Conservation Baden-Württemberg, p. 77, accessed on January 22, 2016 (PDF, German, 1.85 MB).
- ↑ Roland Schröder: Current conditions in the Lower Lake Constance and the exchange of water between the individual lake basins , Report No. 15 of the International Commission on Water Protection for Lake Constance, p. 19, accessed on August 6, 2015 (pdf, German, 2.10 MB)
- ↑ BUND project Radolfzeller Aach ( Memento of the original of September 29, 2007 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ International symposium on beavers at Lake Constance ( Memento of the original from September 29, 2007 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
