Hahnenmoorkanal
Hahnenmoorkanal | ||
Hahnenmoorkanal east of the Herzlake - Berge road |
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Data | ||
location | Districts of Osnabrück , Cloppenburg and Emsland , Lower Saxony ( Germany ) | |
River system | Ems | |
Drain over | Hase → Ems → North Sea | |
source |
Little Rabbit 52 ° 40 ′ 36 ″ N , 7 ° 46 ′ 13 ″ E |
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muzzle |
Big Bunny Coordinates: 52 ° 41 ′ 7 " N , 7 ° 38 ′ 52" E 52 ° 41 ′ 7 " N , 7 ° 38 ′ 52" E
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length | 16.2 km | |
Navigable | No |
Hahnenmoorkanal is a 16.15 km long water channel as an eastern continuation of the Kleiner Hase in the Lower Saxony districts of Osnabrück , Cloppenburg and Emsland .
geography
course
The Hahnenmoorkanal joins the Kleine Hase to the east. It runs in the North German Plain from Menslage over a long stretch without bends towards the west and unites with the Große Hase in the area of the municipality of Herzlake . Beginning in the district of Osnabrück, the central part of the canal runs on the border with the town of Löningen in the district of Cloppenburg and flows west of the triangle of Osnabrück-Cloppenburg-Emsland into the district of Emsland and into the Emsland .
Inflows and outflows
Several bodies of water flow into the Hahnenmoorkanal. However, there are also drains from the Kleiner Hase and the Hahnenmoorkanal to the Großer Hase. These are in the area of the Hahnenmoorkanal (listed downstream):
- Steinmerschgraben (1.7 km long, drain to the right to the Bühnenbach)
- Hahler Beeke (also called Hahler Bach, 2.4 km long, left tributary)
- Renslager Canal (6.4 km long, left tributary)
- Ehrener Graben (2.4 km long, right tributary)
- Schenegraben Vorbach (4.6 km long, left tributary)
History and purpose
The Hahnenmoorkanal was created in 1780–1783. Hopes of being able to use it for shipping purposes were soon dashed. To this day, the Hahnenmoorkanal is primarily used as a receiving water to accelerate the outflow of water from the Osnabrück region and to drain the moors south of it, especially the Hahlener Moor and the Hahnenmoor from which it is named .
Before the canal was built, the Kleine Hase turned north east of Menslage. Today's Bühnenbach follows roughly its earlier course. As a result, the Hase inland delta already ended above Löningen , so that the water masses from the Osnabrücker Land, the southern district of Cloppenburg and the central district of Vechta had to force their way through the bottleneck between the Cloppenburger Geest in the north and extensive moors in the south, which is too frequent and prolonged floods. Due to the relief of the Great Hare and its canalization , floods can now drain away faster than before 1780, especially since the construction of the Hahnenmoorkanals through the middle of moorland means that the distance that the Hasewater has to cover between the former Hase attack near Quakenbrück and Aselage is 24.3 km shortened.
In 1903, the Grand Duchy of Oldenburg had the Kingdom of Prussia confirmed in a state treaty that the arms of the hase running through the town of Quakenbrück must be able to draw ten cubic meters of water per second. The Grand Duchy of Oldenburg was interested in the fact that water from the Osnabrück region was not only drained off via the Große Hase and thus past the Quakenbrück settlement , but also to a significant extent via the Hahnenmoorkanal. In current scenarios, five cubic meters per second are assumed to be the contribution of the Kleine Hase / Hahnenmoorkanal water flow to the drainage of the Quakenbrücker Basin during floods. According to these plans, in the event of flooding, more than 90 percent of the Hasewater flows off via the Raid Hare, the Essen Canal and the Great Hase and not via the Hahnenmoorkanal.
Ecological aspects
The Hahnenmoorkanal is classified by the NLWKN as a " sand- and clay-shaped lowland river". Its chemical condition is rated as “good”, while its ecological condition is rated as “bad”. Criticized are deficits with regard to the course of the watercourse and the bed design, the lack of wood on the banks, the impairment by sand and fine material input and ocher formation, strong flow changes (i.e. the increase in the flow velocity between the former Hase attack and the mouth of the canal at Aselage) and the impairment of the Meadow landscape.
Individual evidence
- ↑ a b Lower Saxony State Agency for Water Management, Coastal Protection and Nature Conservation (NLWKN): Water body data sheet for waters with priority 3rd Hahnenmoorkanal . November 2012
- ↑ Show district 12 and show district 13 in: Classification of the watercourses II. Order into show districts with the show commissioner for the term of office from 01/01/2003 - 31/12/2007 ( Memento from December 24, 2014 in the Internet Archive ), at the entertainment association 97 Mittlere Hase, p. 6f, on uhv97.de
- ^ Hermann Guthe : The Lands of Braunschweig and Hanover . 1887 (reprint Barsinghausen 2013), p. 190 f.
- ^ Franz von Reden: The Kingdom of Hanover, described statistically, initially in relation to agriculture, trade and commerce, Volume 2 . Hahn'sche Hofbuchhandlung. Hanover 1839. p. 366
- ^ Wilhelm Müller-Wille: Floor sculpture and natural spaces in Westphalia . 1966. p. 266
- ↑ Refurbishment of five locks can begin , Neue Osnabrücker Zeitung , January 9, 2002, on noz.de.
- ↑ Lower Saxony State Agency for Water Management, Coastal Protection and Nature Conservation (NLWKN) - Cloppenburg office: Determination of the floodplain of the Great Hare, the Essen Canal and the Raid Hare . November 27, 2013, p. 17
- ↑ Lower Saxony State Agency for Water Management, Coastal Protection and Nature Conservation (NLWKN): Regional structural quality report of the NLWK operating center Cloppenburg 2000 p. 30