Steppach (Aalenbach)

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Steppach
Old name: Stepbach, maybe also: Steinbach
Data
Water code DE : 2386664
location Swabian-Franconian forest mountains

Hohenloher and Haller level

Baden-Württemberg

River system Rhine
Drain over Aalenbach  → Bühler  → Kocher  → Neckar  → Rhine  → North Sea
source approx. 2.5 km southeast of the center of Großaltdorf in the forest approx. 3.5 km west-southwest of the castle hill
49 ° 6 ′ 38 ″  N , 9 ° 55 ′ 53 ″  E
Source height approx.  455  m above sea level NHN
muzzle from the right and east-southeast opposite the cemetery of Großaltdorf in the middle Aalenbach Coordinates: 49 ° 7 ′ 11 ″  N , 9 ° 54 ′ 20 ″  E 49 ° 7 ′ 11 ″  N , 9 ° 54 ′ 20 ″  E
Mouth height 385.1  m above sea level NHN
Height difference approx. 69.9 m
Bottom slope approx. 27 ‰
length 2.6 km
Catchment area 2.108 km²

The Steppach is a creek around two and a half kilometers long in the area of ​​the small town Vellberg in the district of Schwäbisch Hall in north-eastern Baden-Württemberg , which flows into the middle Aalenbach from the left opposite the village of Großaltdorf von Vellberg and altogether east-southeast .

Surname

The stream is labeled on today's (2018) topographic maps as Steppach , a name that is also borne by a river on the lower reaches. This name can already be found - in the written variant Step b ach  - on a card from 1838. A card from the first half of the 20th century, however, names it differently as Steinbach .

geography

course

The Steppach arises at about 455  m above sea level. NHN approx. 2.5 km south-east of the center of the Vellberg village Großaltdorf and approx. 3.5 km west-south-west of the Burgberg summit in the wide edge forests of the Keuperbergland to the open Gäu landscape in the north. The first trickle can be found at the beginning of a blade crack next to the Schiedweg, which leads from the wide access road to the former military depot in Heiligenholz near Oberspeltach north to the Großaltdorf sports field, at the boundary between the Vellberger Waldgewann Spanningersbrunnen and the Großaltdorf Waldgewann Hummelswäsele .

From there, the stream flows in a rapidly deepening, somewhat meandering valley gully, initially westward between the two basins, taking in further rivulets from right and left, including the outflow of a small pond on the plateau above the valley in the Hummelswäsele and a somewhat longer stream a southern secondary blade and about 900 meters after the origin to only about 416  m above sea level. NHN on a former small forest meadow on the valley floor that has now been reforested, one further Klingenbach from left and right; none of these small tributaries has a length of more than 0.4 km and a catchment area of ​​more than 0.2 km². At the last two, the stream turns to the northwest.

After less than 200 meters it flows out of the forest and after a further hundred meters from the left it takes its longest tributary of about 0.7 km, which arises inconsistently in a forest blade at the Königsbrunnen on the valley path of the K 2665 Steinehaig – Kleinaltdorf and on its last 200 meters in an inconspicuous ditch over a meadow in Kühsau . The Schelmenwasen forest on the right-hand side of the river now recedes somewhat from the stream, which now runs in a straight line in a gently curving meadow hollow with fields higher up on the slope with shrubbery on the bank.

At a short ditch inlet from the right of the Großaltdorf sports field on Herdweg, it changes for the last 700 meters to a steady west run, now accompanied by a dirt road until the end. At the bridge over to the cemetery on the southeast edge of Großaltdorf, the Steppach finally flows at 385.1  m above sea level. NHN from the left into the middle Aalenbach , which flows southwest at the foot of the village , about 70 meters above sea level below its origin and after a 2.6 km long run with a mean bed gradient of a little over 27 ‰.

Catchment area

The 2.1 km² catchment area of ​​the Steppach is, from a natural point of view, with its larger and higher east-southeast portion in the lower area of ​​the Burgberg Vorhöhen and Speltach Bay of the northern Swabian-Franconian Forest Mountains , with the rest in the lower area of ​​the Haller level of the Hohenloher and Haller level . The natural area boundary follows, with minor deviations, the boundary between the forest area in the east-southeast and the open landscape in the part near the mouth. The highest two elevations reach a little over 480  m above sea level on the left side of the middle course on the Sporn Streich . NHN and to the right of it on the upper level . 487.2  m above sea level NHN

In contrast, the “upper” and southeastern watershed close to the origin is usually comparatively low. Only a few dozen meters from Steppach origin away on the other side of the path difference arises unstable in the opposite direction to the right Speltach -Oberlauf Buchenbach pulling Seebach . Behind the eastern border up to the highest point on the upper level , the left Speltach upper course Lanzenbach drains the adjacent area. The entire watershed section from the southernmost point of the catchment area near the hikers' car park on a street and path star at the rear Streich to the Upper Plain is hydrologically the most important because there the catchment area of ​​the Kocher with its tributary Aalenbach meets the Jagst with its tributary Speltach. The northern border to near the mouth runs against the insignificant and next upper Aalenbach tributary Zimmerbach , the western against the next lower, a nameless creek ditch to the Aalenbach along the K 2665. Behind the ridge on the streak on the southwest and southern edge of the catchment area, the creek drains through the Brunnenklinge and then the Hilpertsklingenbach over the Echtbach even further down into the Aalenbach.

Keup layers lie underground throughout the area . The highest layers on the upper level and on the slope carry a sandstone reed ceiling ( Stuttgart formation ). In almost all of the rest of the catchment area below, the Gipskeuper ( Grabfeld Formation ) is on the other hand . Beyond the boundary of the natural area and below the uppermost bay of the valley, only the valley's hollow lies in the Lettenkeuper ( Erfurt formation ) of the Unterkeuper .

The brook with its blade crack arises in the gypsum keuper, probably under its erosion-resistant Corbula layer, which forms small plateaus with a sharp slope edge to the valley basins at a similar altitude as there on the Schiedweg on the other side in the Speltach catchment area. Since the upper Steppach and the Seebach run in opposite directions on the same axis and the Seebach has a noticeably more steady and lower gradient than the Steppach, this has probably followed a lost upper course trough of the Seebach running in the Danubian direction in reverse Rhenish erosion.

More than two thirds of the area is forested. In the open corridor, meadows usually reach the shore, while the arable land dominates on the higher hills. The area is completely unpopulated and, with a small portion of forest on the left, up to the upper reaches of the Vellberger, the rest of the Großaltdorf submarket of the small town Vellberg .

Tributaries and lakes

List of tributaries from the source to the mouth. Length of water, catchment area and altitude according to the corresponding layers on the LUBW online map. Other sources for the information are noted.

  • (Blade tributaries in the forest), from right, left, left and right again to about 440– 416  m above sea level. NHN , a maximum of 0.4 km and a maximum of 0.2 km².
  • (Bach vom Königsbrunnen ), from the left and south-southwest to about 412  m above sea level. NHN opposite the southern Schelmenwasen shortly before the field path leading to the brook and the Steppachweg that continues in two forest paths , approx. 0.7 km and approx. 0.2 km². Arises inconsistently up to 450  m above sea level. NHN in a blade above the lower serpentine loop of the K 2665 near the captured Königsbrunnen, which apparently no longer or only rarely pours.
  • (Inflow), from the right and east-northeast to about 398  m above sea level. NHN , approx. 0.3 km and approx. 0.3 km². Arises at about 410  m above sea level. NHN near the Großaltdorf sports field. Mostly follows a dirt road.

nature

The steppach, which is still narrow there, flows quite naturally in the forest, mostly over a gravel or stony bed, the uppermost section and sometimes the upper inlets in sharply cut blades. Moss-covered seepage springs emerge on the slopes and deposit the spring sinter . In the blade area there are deciduous trees like red beeches.

After its exit from the forest, the stream is sporadically followed by a row of ash and alder trees, which only expand a little over a short distance before its last inflow. At the edge of the forest and in the open corridor, the stream is mostly straightened and shows a standard profile on the lower reaches. The land-adjusted open landscape around the middle and lower reaches has been cleared.

Individual evidence

LUBW

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

  1. ↑ a b c d Height according to the contour line image on the background layer topographic map .
  2. ↑ Height according to the gray lettering on the background layer topographic map .
  3. ↑ Length according to the waterway network layer ( AWGN ) .
  4. ↑ Catchment area according to the basic catchment area layer (AWGN) .
  5. ↑ Length measured on the background layer topographic map .
  6. ↑ Catchment area measured on the background layer topographic map .
  7. ↑ Description of nature partly based on the biotope layer .

Other evidence

  1. ↑ Topographical Atlas of the Kingdom of Württemberg - sheet Ellwangen from 1838, sheet XXV in historical, sheet 12 in cartographic-systematic counting (PDF, 5.8 MByte)
  2. ↑ Meßtischblatt 6825 Ilshofen from 1937 in the Deutsche Fotothek
  3. ↑ 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)
  4. ↑ 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 single sheet No. 6825 Ilshofen

Web links