Flachsbach (Werra)

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Flachsbach
Flachsbach.jpg
Data
Water code DE : 41956
location Werra-Meissner district , Hesse , Germany
River system Weser
Drain over Werra  → Weser  → North Sea
source am Roggenberg (Old Court) ( Soodener Bergland )
51 ° 17 ′ 36 "  N , 9 ° 52 ′ 27"  E
Source height approx.  290  m above sea level NN 
muzzle above Wendershausen in the Werra coordinates: 51 ° 19 '1 "  N , 9 ° 53' 27"  E 51 ° 19 '1 "  N , 9 ° 53' 27"  E
Mouth height approx.  138  m above sea level NN 
Height difference approx. 152 m
Bottom slope approx. 46 ‰
length 3.3 km
Catchment area 5.611 km²

The Flachsbach is a left tributary of the Werra in the north of Hesse , Germany .

description

The valley of the Flachsbach is located about 5 kilometers south of the small town of Witzenhausen in North Hesse , the stream flows into the Werra about 700 meters above the center of the incorporated village of Wendershausen . The former Flachsbachsmühle is located near the mouth. The mill, which is now isolated, forms a remnant of the settlement of the deserted village of Flasbach (attested from the 14th to the 16th century). The small hamlet of Rückerode (district of Hundelshausen ) is located near the source of the secondary stream Wechselgrund . Otherwise the stream and its entire catchment area are free of settlements. Around three quarters of the catchment area is forested, predominantly with beech forest , around a quarter is used for agriculture, almost exclusively as grassland .

In terms of nature, the entire catchment area belongs to the Soodener Bergland (reference number 358.02), part of the Lower Werrabergland . Geologically, this forms part of the Unterwerrasattels . Here occur in the saddle core Variscan folded rocks of the Paleozoic to the surface. Most of the catchment area is characterized by the Werra- Grauwacke , a nutrient-poor, acidic, weathered sandstone. In the lower reaches, the Bachtal crosses the Lower and Middle Buntsandstein and, near the mouth, the Muschelkalk . A fault zone in the east of the main valley, above the confluence of the Wechselgrund, is characteristic of the Bach chemistry. Here the dolomite rocks of the upper and middle Zechstein form the subsoil. The springs emerging here have deposited tufa and lead to the fact that the stream is carbonated . The headwaters are called "Lime sinter springs on Flachsbach south of Wendershausen" and are part of the Natura 2000 area ("FFH area") "Werra and Wehretal".

The uppermost source of the Flachsbach is located a little west of the "Old Court", a historical court site (today a crossroads, hiking car park and refuge) at the foot of the Roggenberg. The stream initially flows northeast, but soon swings north. In the upper reaches, numerous nameless, small spring brooks and springs feed the brook, which are characterized by spring tuff formation (limestone tuff). The Bachtal, initially a narrow Kerbtal, lies between the Mittelberg and the Habichtsstein, two wooded mountain peaks about 300 meters high. The rock of the Habichtstein, formed from Zechsteindolomit, towers over the valley in the east. Already near the confluence with the Werra - at Bach kilometer 0.9 - the Wechselgrund, the only larger tributary of the Flachbach, flows from the left. District road 63 runs parallel to this, directly in the valley floor, between Wendershausen and Rückerode. This also accompanies the brook valley of the Flachsbach from here to the confluence with the Werra. While the upper course is consistently in the forest, the lower course forms a wider, open meadow valley. The stream itself is accompanied here by a narrow gallery wood made of black alder .

Data on the water supply and the runoff of the Flachsbach are not available.

ecology

The near-natural, morphologically only slightly changed mountain stream belongs to flowing water type 7: Coarse material rich, carbonate low mountain stream . In the longitudinal zoning it is assigned to the Epi- and Meta rhithral . The macrozoobenthos of the stream is faunistically a typical Bergbach- biocenosis . The occurrence of some species typical of calcareous streams such as the larvae of the caddis flies Tinodes unicolor and Rhyacophila pubescens is remarkable . The source-typical species Synagapetus moselyi and the mayflies Ecdyonurus subalpinus are also rarely found. Also typical of spring brooks is the dragonfly species striped spring damsel ( Cordulegaster bidentata ).

The only species of fish in the Flachsbach is the brown trout .

Individual evidence

  1. ↑ a b Topographic map 1: 50,000 from the HLBG
  2. ↑ a b Water map service of the Hessian Ministry for the Environment, Climate Protection, Agriculture and Consumer Protection ( information )
  3. ↑ Flasbach, Werra-Meißner-Kreis, in: Historisches Ortslexikon (www.lagis-hessen.de) (as of February 9, 2018).
  4. ^ Siegfried Ritzkowski (1978): Geology of the Unterwerra saddle and its edge structures between Eschwege and Witzenhausen (Northern Hesse). Der Aufschluss, special volume 28 (Göttingen): 187–204.
  5. ↑ FFH action plan - No. 4825-302 Werra and Wehretal, sub-area 11: Sintered lime springs on the Flachsbach south of Wendershausen. Hessen-Forst, Hessisch Lichtenau Forestry Office, on behalf of the Kassel Regional Council, Upper Nature Conservation Authority, June 2015.
  6. ↑ Rückerode, Werra-Meißner-Kreis, in: Historisches Ortslexikon (www.lagis-hessen.de) (as of October 16, 2018)
  7. ↑ Types of water bodies in Germany, LAWA river types. Map 1.1 Management map: River type map, status February 2016. download
  8. ↑ Peter Haase and Meertinus PD Meijering (1995): On the macroinvertebrate fauna of a near-natural mountain stream in Northern Hesse. Lauterbornia 20: 65-75.
  9. ↑ Ulrich Schwevers, Beate Adam, Oliver Engler (2005): Fish ecological investigation of the Hessian parts of the river systems of the Weser and Werra. Volume III. Expert opinion on behalf of the State of Hessen, represented by Hessen Forst. Revised version, status: August 2006.