Eierbach (Bühler)

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Eierbach
Data
Water code DE : 23866536
location Hohenloher and Haller level

Baden-Württemberg

River system Rhine
Drain over Bühler  → Kocher  → Neckar  → Rhine  → North Sea
source on the western edge of Buehlertann in Won Erlen pool
49 ° 2 '33 "  N , 9 ° 53' 39"  O
Source height approx.  382  m above sea level NHN
muzzle near the Bühlertanner Niedermühle from the left and west southwest into the former Mühlkanal next to the Bühler coordinates: 49 ° 2 ′ 42 ″  N , 9 ° 54 ′ 15 ″  E 49 ° 2 ′ 42 ″  N , 9 ° 54 ′ 15 ″  E
Mouth height approx.  372  m above sea level NHN
Height difference approx. 10 m
Bottom slope approx. 11 ‰
length 874 m
Catchment area approx. 81 ha

The Eierbach is a creek not quite a kilometer long in the area of ​​the municipality of Bühlertann in the district of Schwäbisch Hall in north-eastern Baden-Württemberg , which flows into the old Mühlkanal next to the Bühler from the left and west-southwest near the Niedermühle of the village .

geography

course

The Eierbach arises in a reasonably steady course in the shallow eastern part of the Erlenlache at about 382  m above sea level. NHN . About a hundred meters southwest of the Aussiedlerhof Im Hag 1, in mostly grazed, completely treeless grassland, a gully one to one and a half meters deep begins abruptly and runs eastwards in a straightened course.

After just a few dozen meters, another 600-meter-long channel runs towards you from the left, which begins as a side ditch of a paved field path in the western lowland bay Erlenlache between the eastern spurs of the ( Mittelfischacher ) Tannenberg in the north and the Galgenberg in the south, this field path for short eastwards, then turns away from it in an arc through meadows to the north and reaches it again via an initially grassy path, later graveled, and then flows straight into the Eierbach. This inlet rarely carries water.

Thereupon the Eierbach flows on an easterly course a few dozen meters apart between the aforementioned, isolated Aussiedlerhof in the north and one tangent to the western edge of Bühlertann in the south, crossed by a farm road and a few meadow crossings over piped sections. About 300 meters after the origin it turns to east-north-east, its previously very shallow basin is now beginning to deepen and it runs under the dam of the L 1066 Bühlertann- Hausen . On the other side, in a course that still shows the straightening, but somewhat steeper and more restless, the Bühlertanner settlement around the Eierbachring is on the right on a small plateau and the higher ridge of the Old Galgenberg is far to the left. On the northern edge of Bühlertann, it passes under the K 2621 Bühlertann – Obersontheim near the entrance to the Niedermühle and then flows out at about 372  m above sea level. NHN from the left in their former Mühlkanal left the Bühler .

The Eierbach is 0.9 km long and has a bottom gradient of no more than 10 meters in altitude and relatively no more than 11 ‰. Its course is drawn as if with a ruler and compass and is completely free of trees as far as the state road, after which old fruit trees can be found sporadically at a distance. In addition to the mentioned, only perennial upstream inflow, it only has inflow from the side ditches that accompany the crossed streets, which are just as inconsistent with water.

Catchment area

The Eierbach drains a catchment area of ​​about 0.8 km² in size approximately east-north-east to the central Bühler. At its western tip, at the highest point of the catchment area, the small plateaus of Galgenberg and Tannenberg meet at around 438  m above sea level. NHN , here only briefly borders the catchment area of ​​the large Bühler tributary Fischach . Behind the long left watershed over Tannenberg and Alten Galgenberg, the distant Dietelsbach runs northeast to the Bühler, beyond the right and south over the Galgenberg and then through Bühlertann eastwards to the closer Seegraben .

The area is mostly open land with a small wooded area in the west on the ridge that surrounds the western Erlenlach and a small part of the closed settlement area of ​​Bühlertann on the south-east edge and lies entirely in the municipality of Bühlertann. In terms of its natural surroundings, it is part of the Hohenlohe plain , more precisely to the Vellberger Bay , the Keuperstufen bay of the Bühler.

geology

layers

The catchment area of ​​the Eierbach lies in the Mittel- and Unterkeuper . The narrow plateaus of the Tannenberg s and the Galgenberg on the western edge are leveled areas on the corbula layer of the gypsum keuper ( Grabfeld formation ). On the Gipskeuper slopes below and in the small valley bay of the western Alder Lache , which also belong to the Gipskeuper, there is only inconsistent water flow. The Lettenkeuper ( Erfurt formation ) starts in the flat valley course near the Eierbach spring and extends to the mouth. A strip of floodplain sediment follows the water.

Geotopes

  • In the far west on the northern slope of the Galgenberg down into the Erlenlach there is a large collapse doline with a diameter of 5–10 meters on a flatter slope section in the forest.
  • On the ridge of the Alter Galgenberg, to the left of the lower reaches, there is an old gypsum quarry near the L 1060. The dismantling, which had been abandoned for decades now (2015), went on the bankrupt base. The pit, in which parts of the excavation edge are still preserved, is preserved and protected, but the gypsum-containing layers are visibly eroding more and more under the weather. Motocross events are held on the rest of the site at times. The gypsum obtained was previously burned in the Niedermühle.

Another, even older, smaller, less and less recognizable mining site is located further to the west on the eastern spur of the Galgenberg .

Tributaries

  • (Nameless ditch), from the left immediately after the source, approx. 0.6 km and approx. 0.4 km². Arises at about 387  m above sea level. NHN next to a paved dirt road in the western alder pool . Very unstable.

See also

Individual evidence

LUBW

Official online waterway map with a suitable section and the layers used here: Course and catchment area of ​​the Eierbach
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. ↑ Length according to the waterway network layer ( AWGN ) .
  3. ↑ a b Catchment area measured on the background layer topographic map .
  4. ↑ Geotopes after the Geotopes layer .
  5. ↑ Length measured on the background layer topographic map .

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 geological map mentioned in the literature, more roughly also on: Map server of the State Office for Geology, Raw Materials and Mining (LGRB) ( notes )

literature

  • Topographic map 1: 25,000 Baden-Württemberg, as single sheet No. 6925 Obersontheim
  • Geological map of Baden-Württemberg 1: 25,000, published by the Geological State Office, 1982, sheet no. 6925 Obersontheim with explanatory booklet
  • Measuring table sheet 6925 Obersontheim from 1936 in the Deutsche Fotothek

Web links