Wiedau (Wümme)

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Wiedau
The Wiedau in Rotenburg / Wümme

The Wiedau in Rotenburg / Wümme

Data
location Lower Saxony , Germany
River system Weser
Drain over Wümme  → Lesum  → Weser  → North Sea
source South of Schwalingen as Mehlandsbach
53 ° 3 ′ 36 ″  N , 9 ° 42 ′ 10 ″  E
Source height 55  m above sea level NN
muzzle At Rotenburg in the Wümme coordinates: 53 ° 6 '26 "  N , 9 ° 23' 25"  E 53 ° 6 '26 "  N , 9 ° 23' 25"  E
Mouth height 18  m above sea level NN
Height difference 37 m
Bottom slope 1.4 ‰
length 25.8 km 
7 km of which  as Mehlandsbach
Catchment area 306.6 km²
Discharge at the Worth
A Eo gauge : 149 km²
Location: 3.1 km above the mouth 		NNQ (06/05/1985)
MNQ 1983/2014
MQ 1983/2014
Mq 1983/2014
 MHQ 1983/2014
HHQ (07/19/2002) 		150 l / s
302 l / s
1.56 m³ / s
10.5 l / (s km²)
 10.3 m³ / s
17 m³ / s
Discharge at the mouth of the
A Eo : 306.6 km² 		MQ
Mq
 		3.27 m³ / s
10.7 l / (s km²)
Left tributaries Hahnenbach , Rodau
Right tributaries Grovebach, Bruchwiesenbach, Trochelbach, Großer Moorgraben, Ahlers Beeck
Medium-sized cities Rotenburg
Communities Neuenkirchen with the localities Schwalingen and Tewel, Brockel with the locality Bellen, Bothel , Hemsbünde

The Wiedau is a left tributary of the Wümme in Lower Saxony (Germany). With its tributaries, it follows the northwestern roof of the Lüneburg Heath , which gradually merges into the sandy Wümmeniederung belonging to the Stader Geest .

course

The upper reaches of the Wiedau is represented by the Mehlandsbach, which is created south of Schwalingen, a town in the Neuenkirchen community , through the confluence of several streams. In the area of ​​the joint municipality of Bothel, the Wiedau flows through a wooded and natural lowland. Shortly after it has picked up the only slightly smaller Rodau from the left , the Wiedau flows into the Wümme in Rotenburg . With an average water flow of 3 m³ / s, it is their largest tributary.

Water quality

The Mehlandsbach and the Wiedau themselves have water quality class II ("moderately polluted") throughout . The Grovebach, which flows into the Mehlandsbach from the right on the upper reaches, has water quality class II-III (“critically polluted”) over its entire length .

fauna and Flora

In the Wiedau live among other eels , trout , perch , pike and roach .

water sports

The Wiedau is a popular fishing and canoeing area . With some restrictions and with good water levels, the Wiedau can be crossed with small kayaks from the road bridge in Bellen near Hemslingen to the confluence with the Wümme for a distance of 23 km from mid-July to the end of March .

Individual evidence

  1. ^ Franzius Institute (University of Hanover): Wümme flood protection plan. (pdf; 7.52 MB) Report No. 685. 2006, p. 276 , accessed on August 10, 2013 .
  2. ^ German Hydrological Yearbook Weser-Ems 2014. Lower Saxony State Agency for Water Management, Coastal and Nature Conservation, p. 207, accessed on October 4, 2017 (PDF, German, 8805 kB).
  3. ↑ Water level data from Worth (Wiedau, MQ = 1.59 m³ / s) and Hastedt (Rodau, MQ = 1.49 m³ / s), increased by the runoff of the remaining catchment area (21 km²), determined from an area runoff of around 10 liters / s km²
  4. ↑ Note: This does not apply to the entire course of the Wümme - Lesum river , since, from a hydrological point of view, its largest tributary is the Hamme .
  5. ↑ Water quality map of the NLWKN

Web links

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