Riedbächle (Benzenbach)

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Riedbächle
Data
Water code DE : 238664524
location Swabian-Franconian forest mountains

Baden-Württemberg

River system Rhine
Drain over Benzenbach  → Fischach  → Bühler  → Kocher  → Neckar  → Rhine  → North Sea
source approx. 2.0 km southwest of Rappoltshofen on the Harzplatte forest slope
49 ° 2 ′ 12 ″  N , 9 ° 49 ′ 3 ″  E
Source height approx.  458  m above sea level NHN
muzzle opposite Rappoltshofen from the right and southwest in the lower Benzenbach coordinates: 49 ° 2 ′ 38 ″  N , 9 ° 50 ′ 39 ″  E 49 ° 2 ′ 38 ″  N , 9 ° 50 ′ 39 ″  E
Mouth height 398  m above sea level NHN
Height difference approx. 60 m
Bottom slope approx. 24 ‰
length 2.5 km
Catchment area approx. 1.2 km²
Residents in the catchment area under 10

The Riedbächle is an approximately two and a half kilometer long stream on the Oberfischach suburb of Obersontheim in the Schwäbisch Hall district in northeastern Baden-Württemberg , which flows into the Benzenbach from the right and southwest across from the hamlet of Rappoltshofen .

geography

course

The Riedbächle emerges steadily about 2 km southwest of the center of the Obersontheimer hamlet Rappoltshofen on the eastern slope of the Limpurger Mountains in the Harzplatte forest at about 458  m above sea level. NHN . In damp weather, however, it rises about a quarter of a kilometer further west and further up the mountain at about 480  m above sea level. NHN , a little below the point where the coniferous forest of the Harz plate wedges at an incipient ravine of the steeper uphill slope. From here on, a two to three meter wide hollow stretches down into the valley, which outside the narrow, sandy creek bed is overgrown with grass under gaps in the treetops, but with moss under the dark spruce. Before the gully reaches the crossing forest path, beyond which the constant run begins, it disappears again. Immediately below the cross path, which is paved with roof slab rubble, there is a somewhat winding railing channel in which the stream usually begins.

From here the brook flows about 400 meters further east-downward and usually disappears again before the oak-covered forest edge. Towards the adjacent field, a no more than one and a half meter high, 30-40 meter long dam blocks the shallow valley basin, behind it the water collects in individual flat puddles without any visible runoff. However, a remnant of a drainage pipe lying around indicates that the water that may accumulate here is evidently drained underground. In the following field, which at first appears to have the shape of a shallow tub, there is no longer any open run. This remains so for the next 600 meters, where the watercourse passes under large fields, a dirt road and another field. Then a small, grassy hollow, moving northeast, begins in the surrounding, very flat terrain of the Gewanns Streich , on the left slope of which a field soon extends down to the hollow line; here too there is initially no creek bed. About a hundred meters later, a drainage hole in the grass is kept free in front of a concrete pipe, from which the rush of water can be heard when it rains. A few dozen meters further, the stream suddenly runs in an open ditch, which, however, hardly has any water here in summer.

This remains so until beyond the next crossed farm road, on the side of which a left side ditch runs. Only from about the point where there is a wider stretch of meadow on the left bank does the brook carry more powerful water, even in the dry season. Here is also the first lonely bush on the previously bare corridor. Almost 200 meters later, the Riedbächle passes under the connecting road from Engelhofen to Rappoldshofen (K 2622) at an Aussiedlerhof on the flat hill on the left in the tub . On the other side the valley is now deepening. On the steeper right slope in an old tree garden there is a cow pasture with a pool, apparently fed by the damp slope, from which the animals drink. Just over 500 meters after crossing the street, however, the valley merges into the wide floodplain of the Benzenbach, which is already very close to the left. The Riedbächle runs a little over a hundred meters at the foot of the right slope next to a hedge and then turns abruptly to the left. In an artificial ditch it runs another hundred meters northwards and then flows out of a pipe under a dirt road across from Rappoldshofen at about 398  m above sea level. NHN in the also straightened course of the lower Benzenbach , which after a roughly kilometer further east run then itself flows into the Fischach .

The Riedbächle is 2.5 km long from its permanent forest origin and with an absolute bottom slope of approx. 60 m has a relative of 24 ‰.

At the last bend, the Riedbächle apparently continued in earlier times in an eastward course as the Birkenbach along the above-mentioned hedge. For more information, see the article on Benzenbach .

Catchment area

The Riedbächle drains an area of ​​about 1.2 km² on the east side of the Limpurger Mountains and in the adjacent Fischachbucht and edge heights east to the Benzenbach, both sub-areas of the Swabian-Franconian Forest Mountains .

On the north side it borders on the catchment area of ​​the Streitbach or Breitbach or further down to the immediate catchment area of ​​the receiving Benzenbach. Competes beyond on the south side pranks of downward Fischachzufluss Bühlbach on Ostlauf. To the west, the small brook has at most a very short watershed to the Steppach flowing into the Kocher near Gaildorf - Großaltdorf west of the Limpurger Mountains , if the catchment area does not even wedge to a point on the flat Streitberg summit ( 514  m ) from its poorly profiled plateau ; there is also the highest point in the catchment area.

About a third of the catchment area is forested, it is the western part with the mountain plateau around the Streitberg and the slope of the Harzplatte. The bulk of the corridor surface lies flat on a pretty, mostly tilled level of medium height around 430 to 420  m above sea level. NHN , into which the basin only slowly deepens. There are meadows mainly in this hollow, on the northern edge of the forest, from where the mentioned tributary comes from, and finally in the small part of the Benzenbach valley floodplain, which is about 400  m .

The only settlement area is the Rappoldshofener Aussiedlerhof at the Kreisstraße in der Wanne . With the exception of its area, the entire open part of the catchment area belongs to the Fischachtal landscape protection area with side valleys and adjacent areas between Herlebach and Kottspiel .

Tributaries

The Riedbächle has only a fairly constant inflow. This arises in a smaller western forest bay northeast of the seine at not much more than 450  m above sea level. NHN , leads into the corridor after less than 200 meters to over 440  m above sea level. NHN quite reliable water, but then also drains underground, apparently under a small notch in the adjacent meadow, on the route of which concrete pipes sometimes allow it to be crossed with equipment even in wet weather. After about half a kilometer, it flows into an open ditch in the area of ​​an isolated group of trees. This then turns right following a dirt road in an inconspicuous hollow on the southeast run. At the first crossing of the open corridor of the Riedbach it runs at a little over 420  m above sea level. NHN to this from the left. This smaller left upper course is about 0.8 km long including its underground stretch, its catchment area is almost 0.2 km².

geology

The Riedbächle runs entirely in the Mittelkeuper . Depending on the weather, its source lies in the transition area between the Lower Colorful Marls ( Steigerwald Formation ) and reed sandstone ( Stuttgart Formation ) or deeper in the upper Gipskeuper ( Grabfeld Formation ). The rather flat and wide plain in the streak after it emerges from the forest lies above the corbula layer of the gypsum keuper, a thin, dolomitized limestone layer embedded in it, which is therefore very erosion-resistant and takes up large areas in the area of ​​the right Fischach valley. The mouth is also still at the level of the Gipskeuper in the wide lower bay of the Benzenbach, flattened by alluvial sediments.

See also

Individual evidence

LUBW

Official online waterway map with a suitable section and the layers used here: Course and catchment area of ​​the Riedbach
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. ↑ a b Length measured on the background layer topographic map .
  5. ↑ 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 ). The geological map listed under → Literature offers a similar picture on the eastern part of the catchment area  .

literature

  • Topographical map 1: 25,000 Baden-Württemberg, as single sheet No. 6924 Gaildorf and 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