Rohrwiesengraben (Bühler)

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Rohrwiesengraben
Data
Water code DE : 23866512
location Swabian-Franconian forest mountains

Hohenloher and Haller level

Baden-Württemberg

River system Rhine
Drain over Bühler  → Kocher  → Neckar  → Rhine  → North Sea
source (Temporary) left branch from the lowest Fischach near Bühlertann- Kottspiel shortly before its confluence
49 ° 1 ′ 8 ″  N , 9 ° 54 ′ 29 ″  E
Source height approx.  377  m above sea level NHN
muzzle opposite the Weidenmühle von Bühlertann from the left and south-southeast in the middle Bühler coordinates: 49 ° 1 '29 "  N , 9 ° 54' 18"  E 49 ° 1 '29 "  N , 9 ° 54' 18"  E
Mouth height approx.  373  m above sea level NHN
Height difference approx. 4 m
Bottom slope approx. 5.6 ‰
length 713 m
Catchment area under 30 ha

The Rohrwiesengraben is under a kilometer long floodplain ditch in the area of ​​the municipality of Bühlertann in the district of Schwäbisch Hall in northeastern Baden-Württemberg , which flows from the left at the Weidenmühle and about south into the middle Bühler .

geography

course

The Rohrwiesengraben begins its course about a hundred meters west of the outskirts of the Bühlertanner hamlet of Kottspiel in the Auenwiesengewann Beinich . The trench cut begins a few meters west of a side embankment, at most one meter high, interrupted there by a notch. The Fischach itself flows there about a dozen meters below a transverse structure at least two meters below ground level in a wide trough.

The only weak and long-winded, almost sloping ditch flows in an approximately north-northwest direction and after the first 150 meters is spanned by a concrete bridge with a parapet that gives farmers access to the meadows between Rohrwiesengraben, Bühler and Fischach. Then the completely tree and shrub free trench with reeds and reeds is passed. Towards the end of his run he crosses the Rohrwiesen district . Then it flows into a very steep drop on the side of the Bühlerbrücke, over which a small road from the Bühlertalstraße L 1072 at the left foot of the slope of the Bühlertal opens up the former mill, opposite the Bühlertanner Weidenmühle from the left into the middle Bühler.

The Rohrwiesengraben flows after a 0.7 km long run with a mean bottom gradient of around 6 ‰ around 4 meters below its start. Excluding the length alone, the values ​​mentioned are relatively imprecise due to the errors in reading the heights from the map and their only small difference.

The only open tributary is a ditch less than 0.1 km long, dead straight from the left of the L 1072 between two properties on the lower reaches.

Catchment area

The Rohrwiesengraben has a catchment area of ​​less than 0.3 km². From a natural perspective, it is located in the transition area between the sub-area Fischachbucht and the edge heights of the Swabian-Franconian forest mountains in the south and southwest and the sub-area Vellberger Bucht of the Hohenloher and Haller level in the north-east along the Bühler; Due to the generalization error of the natural area maps and probably also a certain arbitrariness in the layout of the natural areas (parts of the Bühleraue below the Fischach tributary are added to the sub-area Fischachbucht and edge heights ) the exact allocation is apparently somewhat random and arbitrary.

The catchment area is almost entirely in the Gipskeuper ( Grabfeld Formation ), with the exception of only a tiny gusset up on the Leippersberg in the reed sandstone ( Stuttgart Formation ). The Bühleraue, in which the Rohrwiesengraben flows, is filled with a thick layer of alluvial clay, which is exposed at the mouth next to the Bühler mostly and sometimes after landslides also on the sides of the trough of the lowest Fischach.

The with about 436  m above sea level. NHN greatest height reached the area on the side of the hill Leippersbergs ( 448.1  m above sea level. NHN ) in the northwest corner of the catchment area. Across the northern watershed from there to the mouth of the Rohrwiesengraben, a short, unstable and nameless razor brook competes, which feeds Bühler a little downhill, in the floodplain without an open course . This itself is the next body of water in the northeast in the floodplain, further up in the east the lowest Fischach . Even beyond the long southwestern watershed on the ridge of Hummelshalde , Berg and again Leippersberg , the outflow reaches the lower Fischach.

The wide Bühleraue includes meadows. On the rise to the ridge in the west in front of the lower Fischachtal there are pastures with fruit trees. Up on the narrow strip in front of the watershed to the lower Fischach the fields dominate. The area is completely unpopulated and, with the exception of a tiny spandrel of the local exclave of the neighboring municipality of Bühlerzeller on the Leippersberg, belongs to the municipality of Bühlertann .

See also

Individual evidence

LUBW

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

  1. ↑ a b c Height according to the contour line image on the background layer topographic map .
  2. ↑ Length according to the waterway network layer ( AWGN ) .
  3. ↑ Catchment area measured on the background layer topographic map .
  4. ↑ Length measured on the background layer topographic map .
  5. ↑ Height according to the gray lettering 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 layers for Geological Map 1: 50,000 on: Map server of the State Office for Geology, Raw Materials and Mining (LGRB) ( notes ). The geological map listed under → Literature offers a similar Bold  .

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 State Geological Office 1982, sheet no. 6925 Obersontheim with explanatory booklet.

Web links