Ahlbach (Jagst)

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Ahlbach
The Buch flood retention basin with the small mouth of the Ahlbach at the top left

The Buch flood retention basin with the small mouth of the Ahlbach at the top left

Data
Water code DE : 2388118
location Foreland of the eastern Swabian Alb

Baden-Württemberg

River system Rhine
Drain over Jagst  → Neckar  → Rhine  → North Sea
origin Confluence of the right Längenbach and the left Strütbach in book
48 ° 54 ′ 31 ″  N , 10 ° 8 ′ 11 ″  E
Source height below  452  m above sea level NHN
muzzle from the left and southwest into the Jagst in the flood retention basin Buch Coordinates: 48 ° 54 ′ 45 ″  N , 10 ° 8 ′ 54 ″  E 48 ° 54 ′ 45 ″  N , 10 ° 8 ′ 54 ″  E
Mouth height approx.  449.7  m above sea level NHN
Height difference approx. 2.3 m
Bottom slope approx. 0.41 ‰
length with upper reaches Strütbach :
approx. 6.3 km

with the upper reaches Längenbach :
approx.  5.6 km 
total name run:
approx. 974 m

only up to the lake shore:

approx. 494 m
Catchment area 13.668 km²

The Ahlbach is the less than one kilometer long lower course of a brook system in the Ostalbkreis in eastern Baden-Württemberg , which flows from the left at the Rainauer Weiler Buch into the flood retention basin Buch , which there is the upper Jagst . Together with its longer left upper course Strütbach , the stream is 6.3 km long. However, its slightly shorter right upper reaches Längenbach contributes almost two thirds to its 13.7 km² catchment area .

geography

course

The Ahlbach arises in Buch from the union of the north-northeast of Neuler im Strüt at about 502  m above sea level. NHN emerging Strütbach with the about 492  m above sea level. NN on the edge of the forest island Baumgarten between Neuler and the Hüttlingen- Oberlengenfeld, which rises to the south-southeast of it, Längenbach. Both upper courses flow south-east for a long time and, in the case of the Längenbach, pass under the south of Buch, in the case of the Strütbach in Buch, the K 3320 (old route of the B 290 ) from Oberalfingen to Schwabsberg . In Buch, after a bend, the course of the Längenbach comes up to below 452  m above sea level. NN from the south on the Strütbach running eastwards here. The resulting Ahlbach runs about 0.5 km to the northeast, crosses under the Obere Jagstbahn and flows beyond the tracks at about 449.7  m above sea level. NHN straight into the slender western mouth of the Buch flood retention basin . There is hardly any gradient on this short stretch. Through its mouth, which is spanned by a bridge of the B 290, it flows about another 0.5 km to the current line of the Jagst. To the right of the bay, on the spur of the mouth, are the remains of the Buch fort , which has been made recognizable by planting .

Catchment area

The Ahlbach has a catchment area of ​​13.7 km². It is in the area where Jagst and Oberer Kocher come closest to each other on their respective upper reaches between Buch and Hüttlingen . The competing waters are in turn the Sizenbach running to the downward Jagst in the north, the Jagst with only insignificant other tributaries on the entire northeast side, the Mittelbach running to the Kocher in the south and Kocher and finally its deeper tributary Schlierbach on the southwest side.

The catchment area naturally belongs to the foreland of the eastern Swabian Alb , mostly to its sub-area of ​​the Goldshöfer Terrassenplatten , in which the Ahlbach runs, the smaller north-western part to the sub-area of Platte von Neuler .

At the north-west corner is at 524.5  m above sea level. NHN highest point on a flat hilltop north-east of Neuler. From there, the terrain slopes moderately to the south-east, in line with the predominant direction of the upper reaches, which follow the geological stratification in the south-west German stratovaginal level .

The Neuler slab is a leveling in the Black Jurassic , adjoining it is the lowest layer of the Opalinus Clay Formation of the overlying Brown Jurassic , and in the far south-east there is also briefly its overlying iron sandstone formation . The Strütbach has dug its way down under the Jura to the higher Keuper layers. The Jura layers are overlaid on large areas of much younger islands Goldshöfer Sande , old Pleistocene river deposit layers from the time when Jagst and Kocher united in the opposite direction in this area and drained over the Urbrenz to the Danube . The terrain profile shows in several places, especially near the Goldshöfe train station , that the sands were mined earlier.

The area is in the Ostalbkreis , with the largest share of the area in the municipality of Rainau in the east, the municipality of Hüttlingen in the west and the municipality of Neuler in the north. Smaller shares belong to the municipality of Westhausen in the southeast and the city of Aalen in the south. The large Rainau hamlet of Buch is located on the Ahlbach itself , while elsewhere in the catchment area there are some much smaller towns. Overall, the population is low.

Tributaries and lakes

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

Confluence of Ahlbachs to below 452  m above sea level. NHN in the Rainau hamlet of Buch .

  • Längenbach , right upper course and finally tapering from the south, 4.6 km and 8.6 km². Arises at about 492  m above sea level. NHN west-northwest of Hüttlingen - Oberlengenfeld on the edge of the forest.
    • (Ditch from the Bruckwiesen), from the right and west to about 480  m above sea level. NHN south of Oberlengenfeld, 0.9 km and approx. 0.4 km². Starts at about 495  m above sea level. NHN at the Hüttlinger Lachenschafhaus .
    • (Graben through Wiesengewann Gern ), from the right and west to about 477  m above sea level. NHN between Ober- and Hüttlingen- Mittellengenfeld , approx. 0.6 km and approx. 0.2 km². Arises at about 488  m above sea level. NHN at the Haldenschafhaus in Hüttlingen.
    • Mittellengenfelder Bach , from the right and west to about 471  m above sea level. NHN near Mittellengenfeld, 1.0 km and approx. 0.7 km². Arises at about 489  m above sea level. NHN between Hüttlingen- Sulzdorf and Mittellengenfeld.
    • (Graben), from the right and west to about 465  m above sea level. NHN east of Hüttlingen- Unterlengenfeld in front of a road crossing a stream, approx. 1.1 km and approx. 0.4 km². Arises at about 487  m above sea level. NHN north of Hüttlingen in the Hagenbuch .
    • Eichwaldgraben , from the right and south to about 457  m above sea level. NHN between the forest islands Kriegwart right and Heisenberg left below an old dam in the Gewann Frauenweiher , 1.7 km and about 1.8 km². Arises at about 475  m above sea level. NHN north-east of Aalen - Wagenrain on the city limits of Hüttlingen on the edge of the Kriegwart to the Eichenwald corridor .
      • Kriegwartgraben , from the left and southwest to about 461  m above sea level. NHN northwest of Goldshöfe train station , 0.8 km and approx. 0.4 km². Arises at about 476  m above sea level. NHN east of the Hüttlinger industrial park around Gottlob-Daimler-Strasse in the Wiesengewann Eichwald .
      • RiverIcon-SmallLake.svgFlows through at about 460  m above sea level. A little after the previous one a pond, 1.5 ha.
    • Forstbach , from the right and south-east to about 455  m above sea level. NHN opposite the southern tip of Buch on the upper Jagstbahn , 2.8 km and 2.0 km². Arises at about 507  m above sea level. NHN in the Westhausen hamlet of Baiershofen .
      • RiverIcon-SmallLake.svgPasses on the lower reaches between the Riesbahn and the Upper Jagstbahn on a distance of less than 300 meters between 457 and 455  m above sea level. NHN five ponds on the right of the course of 0.7 ha.
  • Strütbach , left upper course and finally tapering from the west, 5.3 km and 4.4 km². Arises at about 512  m above sea level. NHN in the Strüt east-northeast of Neuler.
    • RiverIcon-SmallLake.svgFlows through below 487  m above sea level. NHN the brook pond northeast of Oberlengenfeld, 1.8 ha.
    • RiverIcon-SmallLake.svgPassed at about 481  m above sea level. A little later a small pond on the left bank, 0.1 ha.

Mouth of the Ahlbach from the left and southwest to approx. 449.7  m above sea level. NHN a little northeast of Rainau- Buch in the upper Jagst in the flood retention basin Buch . The stream is approx. 0.5 km long from the confluence of its upper courses to the lake shore, from there to the stream line of the Jagst in the Buch reservoir, 1.0 km, further along with the longer upper course Strütbach 6.3 km long. Its catchment area covers 13.7 km².

Nature and protected areas

There is forest in a large part of the area, especially in the south and in a broad north-south strip west of the largest town of Buch. From Bächweiher to where the Strütbach crosses these strips in his Wiesenaue to the edge of the book, which is 39 hectare conservation area Strutbachtal (sic) furnished. A natural monument on the edge of Goldshöfe is a pond near Goldshöfe (0.1 ha) with no surface drainage in the catchment area of ​​the Eichwaldgraben, at the mouth of the Forstbach in the Längenbach the Burgstall near Buch .

history

The Upper Germanic-Raetian Limes crosses the two large upper reaches from southwest to northeast; some of it can still be seen in the terrain.

See also

Individual evidence

LUBW

Official online waterway map with a suitable section and the layers used here: Course and catchment area of ​​the Ahlbach
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. ↑ a b c d Length according to the waterway network layer ( AWGN ) .
  3. ↑ a b c Length measured on the background layer topographic map .
  4. ↑ a b c Catchment area summed up from the sub-catchment areas according to the basic catchment area layer (AWGN) .
  5. ↑ Height according to black lettering on the background layer topographic map .
  6. ↑ a b Lake area according to the layer standing waters .
  7. ↑ Catchment area according to the basic catchment area layer (AWGN) .
  8. ↑ a b c d e f Catchment area measured on the background layer topographic map .
  9. ↑ Protected areas according to the relevant layers.

Other evidence

  1. ↑ Hansjörg Dongus : Geographical land survey: The natural spatial units on sheet 171 Göppingen. Federal Institute for Regional Studies, Bad Godesberg 1961. →  Online map (PDF; 4.3 MB)
  2. ↑ Geology partly according to the geological map listed under →  Literature . Provides a coarser overview: 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. 7026 Ellwangen (Jagst) West and No. 7126 Aalen
  • Geological map 1: 25,000 of Baden-Württemberg, published by the Geological State Office in 1980, sheet no. 7126 Aalen with explanatory booklet. (Only covers the southern edge of the catchment area)

Web links