Knüttelbach

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Knüttelbach
Data
Water code DE : 238851822
location Kocher-Jagst Plains

Baden-Württemberg

River system Rhine
Drain over Jagst  → Neckar  → Rhine  → North Sea
source West edge of the Leuterstaler Forest
49 ° 19 ′ 45 ″  N , 9 ° 26 ′ 50 ″  E
Source height approx.  317  m above sea level NHN
muzzle through Jagsthausen- Olnhausen in the local right Mühlkanal next to the lower Jagst coordinates: 49 ° 18 '42 "  N , 9 ° 26' 34"  E 49 ° 18 '42 "  N , 9 ° 26' 34"  E
Mouth height approx.  187  m above sea level NHN
Height difference approx. 130 m
Bottom slope approx. 54 ‰
length approx. 2.4 km
Catchment area approx. 1.9 km²

The Knüttelbach is a 2.5 km long brook in the district of Heilbronn in central Baden-Württemberg , which flows into the lower Jagst from the right and north in the Olnhausen district of the Jagsthausen community via the short mill ditch there .

geography

course

The Knüttelbach arises on the west-southwest edge of the Leuterstaler Wald on the border between the Salenbusch field of the municipality of Jagsthausen on the left, southeast and the Knüttelbach field of the small town of Widdern on the northwest opposite side of the initial run at about 317  m above sea level. NHN . At first it flows in a fairly straight ditch and between only sporadic tree and shrub growth on the banks less than half a kilometer to the south-west, and finally a short stretch under a field. Then he turns, meanwhile about 30 meters in altitude opposite the surrounding hills, in the interior of the Jagsthausen area and accompanied by a field path, on the south and later south-southeast.

More than half a kilometer further, it flows through a retention basin under the farm road that is now on the right slope. Then he begins to run in the so-called blade in gentle curves along the long slope forest, which is only adjacent to the left, while opposite initially only a bank gallery of trees stands. Half a kilometer before the estuary, the valley, which is wooded on both sides for a short section, bends about 70 ° to the right. After a few hundred meters, the stream enters the Olnhausen district of Jagsthausen. The gallery on both sides ends in front of the town center and the stream disappears in a hollow under Rathausstrasse, which continues in its south-westerly direction. After the house at Rathausstrasse 24 on the southern outskirts, it flows openly for the last fifty meters and now flows southwards under trees. It flows into about 187  m above sea level. NHN , a few meters down the bridge over Rathausstrasse, from the right into the Mühlkanal of the village, which itself flows back a little more than fifty meters down from the right into the lower Jagst .

The Knüttelbach, with an average bottom gradient of about 54 ‰, flows steeply to the valley after about 2.4 km, about 130 meters in altitude below its origin. It has no significant open tributaries.

Catchment area

The Knüttelbach has a catchment area of ​​around 1.9 km², of which the northern and central part, in natural terms, belongs to the Seckach-Kessach-Riedel sub -area , the southern part near the mouth to the Lower Jagsttal sub- area of the Kocher-Jagst plains . The highest point on the northern tip is at 351.4  m above sea level. The forest crest of the Obernberg reaching the NHN , to the left of the upper course, another crest on the eastern watershed rises up to 343.7  m above sea level in the Birkach arable land . NHN .

Both have an island-like cover with loess sediment from Quaternary deposits. The other altitudes before the beginning of the stream and on both watersheds are in the Lettenkeuper ( Erfurt formation ). In the valley basin and on the lower slopes up to Olnhausen there is Upper Muschelkalk . In the village, the stream crosses a narrow strip of Middle Muschelkalks on the edge of the Jagst valley, passes a small alluvial cone and then flows into the floodplain loam around the Jagst.

Beyond the eastern watershed in the upper section, a stream that only carries water periodically runs from Leuterstal to shortly before Rappen, behind the lower one there is only a short drainage ditch to the Jagst; on the opposite side of the western one, a small brook in the far south has torn a short blade leading to the Jagst, while the competitors farther north on this part of the catchment area border are draining to the lower Kessach .

The forest area in the north is divided roughly half-half into a western part, which belongs to the city of Widdern and an eastern part, which belongs to the municipality of Jagsthausen . The uppermost course to the southwest is initially Grenzbach between the two municipalities, then the border slowly climbs up the right valley slope. The Jagsthausen town of Olnhausen is the only settlement in the catchment area.

Nature and protected areas

From around the beginning of the southern course of the brook and up to its mouth, the valley belongs to the large landscape conservation area Jagsttal between Jagsthausen and Möckmühl-Züttlingen with adjacent parts of the area along the lower Jagst, excluding the Olnhausen local area alone. The deepened valley is followed halfway up the right slope by field trees on the border between the fields above and the right valley floor used as grassland. In the blade , the stream has a bed of rocky slabs one to two meters wide, rich in rubble, where it can fall dry in summer due to seepage in the shell limestone. To the left above the Talknick before Olnhausen, surrounded by a hillside forest, lies a dry, bushy slope with old stone walls and stone bars. Further down via Olnhausen on the right slope of the Jagst valley there is an even more open dry stone wall area that testifies to old viticulture.

Knüttelbach flood retention basin

The Knüttelbach flood retention basin, which the brook runs through on the middle course and was built in 1981 as a 6 m high earth dam, is operated by the Ette-Kessach water association in Mulfingen . It is usually dry and can hold back up to 4800 m³ of flood water, which then flows away uncontrolled.

See also

Individual evidence

LUBW

Official online waterway map with a suitable section and the layers used here: Course and catchment area of ​​the Knüttelbach
General introduction without default settings and layers: State Institute for the Environment Baden-Württemberg (LUBW) ( notes )

  1. ↑ a b Height according to the contour line image on the topographic map background layer .
  2. ↑ a b c Height after black lettering on the background layer topographic map .
  3. ↑ Height according to the blue lettering on the background layer topographic map .
  4. ↑ Length according to the waterway network layer ( AWGN ) with an additional small upper course, measured on the background layer topographic map , which was not taken into account in the polygon.
  5. ↑ Catchment area of ​​the Olnhausen hydropower plant according to the basic catchment area (AWGN) layer , deducted from this the small, measured catchment area on the background layer topographic map , which flows directly into the Mühlkanal there via the Knüttelbach.
  6. ↑ Protected areas according to the relevant layers, nature partly according to the biotope layer .

Other evidence

  1. ↑ Wolf-Dieter Sick : Geographical land survey: The natural space units on sheet 162 Rothenburg o. D. Deaf. Federal Institute for Regional Studies, Bad Godesberg 1962. →  Online map (PDF; 4.7 MB)
  2. ↑ Geology according to the layers for Geological Map 1: 50,000 on: Map server of the State Office for Geology, Raw Materials and Mining (LGRB) ( notes )

literature

  • Topographic map 1: 25,000 Baden-Württemberg, as a single sheet No. 6622 Möckmühl

Web links