Längenbach (Ahlbach)

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Längenbach
Confluence of Strütbach (from left) and Längenbach (from right) to Ahlbach (back)

Confluence of Strütbach (from left) and Längenbach (from right) to Ahlbach (back)

Data
Water code DE : 2388118
location Baden-Württemberg
River system Rhine
Drain over Ahlbach  → Jagst  → Neckar  → Rhine  → North Sea
source approx. 0.8 km west of Hüttlingen- Oberlengenfeld at the edge of the forest
48 ° 55 ′ 18 ″  N , 10 ° 5 ′ 50 ″  E
Source height approx.  492  m above sea level NHN
confluence in Rainau- Buch from the right with the Strütbach to Ahlbach Coordinates: 48 ° 54 ′ 31 ″  N , 10 ° 8 ′ 11 ″  E 48 ° 54 ′ 31 ″  N , 10 ° 8 ′ 11 ″  E
Mouth height below  452  m above sea level NHN
Height difference approx. 40 m
Bottom slope approx. 8.7 ‰
length 4.6 km
Catchment area 8.619 km²

The Längenbach is a 4.6 km long brook in the Ostalbkreis in eastern Baden-Württemberg , which in the hamlet of Buch in the municipality of Rainau flows from the right with the somewhat longer Strütbach to the Ahlbach .

geography

course

The Längenbach begins its course about 800 meters west-northwest of the Hüttlinger hamlet Oberlengenfeld on the edge of the forest at about 492  m above sea level. NHN . For the first two-thirds of its way, it flows southeast. In doing so, it passes Oberlengenfeld on the flat left slope and then, as with all the following from the right, takes up a series of western tributaries, first two unnamed trenches from the Lachenschafhaus farm and then from the Haldenschafhaus residential area of Hüttlingen. At Mittellengenfeld , the somewhat longer Mittellengenfeld stream flows from the same direction , whereupon an unstable ditch runs past Hof Unterlengenfeld just before a road bridge.

After this, the creek turns slowly on the 135 ° left curve of its lower reaches to the north and initially enters a forest area across the municipal boundary to Rainau with its accompanying meadow. At about its southernmost point of its course, the Eichwaldgraben flows into it from the south. Already near the outskirts of Buch it crosses under the K 3320 and then moves close to the Obere Jagstbahn , through which the Forstbach flows from the southeast to its 2.8 km length and a catchment area of ​​2.0 km² in both respects largest tributary.

On its last 500 meters, it now flows north and away from the forest to Buch, where it is below 452  m above sea level. NHN merges with the somewhat longer Strütbach to the Ahlbach , which feeds the Jagst after only a short run in the Rainau-Buch reservoir .

The Längenbach is 4.6 km long, it flows only about 40 meters below its origin, which is why it has only a slight mean slope of about 9 ‰.

Catchment area

The catchment area of ​​the Längenbach covers 8.6 km², making it the main upper reaches of the Ahlbach, which is only very short. Along its entire length, on its northeast side beyond the 20-meter-high watershed, the left upper course Strütbach des Ahlbach, which flows steadily about a kilometer away, competes. From the mouth upwards, the catchment area border on the right side of the Längenbach runs first towards the east towards the Jagst , then only towards the catchment area of ​​the Kocher . This competes in the south over the Mittelbach and on the long southwest side of the catchment area then over a small village stream through Hüttlingen and several left tributaries of its tributary Schlierbach .

The highest point of the catchment area is on its north-western tip a little east of Neuler at 492  m above sea level. NHN . From there, the terrain drops moderately to the south-east, corresponding to the larger part of the stream that follows the geological stratification in the south-west German stratified level land .

The catchment area expects natural area to the foothills of the eastern Swabian Alb , only in the northwest to the board of Neuler , otherwise the subspace of Goldshöfer patio slabs .

The Neuler slab is a leveling in the Black Jurassic ; to the east, the lowest layer of the Opalinus Clay Formation of the overlying Brown Jurassic adjoins it; in the far south-east there is also briefly its overlying iron sandstone formation . The Jura layers are overlaid on large areas, especially on the lower reaches, of the much younger Goldshöfer Sande islands , old Pleistocene river deposit layers from the time when Jagst and Kocher united in this area with roughly opposite directions 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 Hüttlingen in the west and the municipality of Rainau in the east. Smaller ones belong to the municipality of Neuler in the north, the municipality of Westhausen in the southeast and the city of Aalen in the south.

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.

Source of the Längenbach 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.

The confluence of the length of Bach from the left, and finally south to below 453  m above sea level. NHN in Rainau- Buch with the left Strütbach to the Ahlbach . The stream is 4.6 km long. Its catchment area covers 13.7 km².

Localities

on the run with their affiliations. Only the names of the lowest nesting level denote neighboring settlements.

Landscape image

Remains of old dams and district names indicate that there used to be a number of reservoirs on the Längenbach and its tributaries.

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. 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 the Burgstall near Buch .

history

The route of the Upper German-Raetian Limes crosses the Längenbachmulde a little below Mittellengenfeld.

Individual evidence

LUBW

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