Holderbach (Jagst)

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Holderbach
Local name of the upper course: Ilgenbach
Data
Water code DE : 2388318
location Kocher-Jagst Plains

Baden-Württemberg

River system Rhine
Drain over Jagst  → Neckar  → Rhine  → North Sea
source in the Glaswiesen field, northeast of Langenburg- Atzenrod
49 ° 15 ′ 56 ″  N , 9 ° 52 ′ 49 ″  E
Source height approx.  477  m above sea level NHN
muzzle from the right and finally east between Langenburg- Unterregenbach and Mulfingen - Eberbach just before the city limits in the middle Jagst coordinates: 49 ° 17 ′ 0 ″  N , 9 ° 50 ′ 27 ″  E 49 ° 17 ′ 0 ″  N , 9 ° 50 ′ 27 ″  O
Mouth height almost  278.9  m above sea level NHN
Height difference approx. 198.1 m
Bottom slope approx. 38 ‰
length 5.2 km
Catchment area 6.659 km²

The Holderbach is a slightly over 5 km long stream in the Brüchlinger Wald in the area of ​​the city of Langenburg and on the edge of the municipality of Blaufelden in the district of Schwäbisch Hall in northeastern Baden-Württemberg . The stream, which runs roughly north and then roughly west, flows into the middle Jagst from the right between the Langenburg hamlet of Unterregenbach and the village of Eberbach in the neighboring community of Mulfingen in the Hohenlohe district .

Surname

According to a local spring, the Holderbach arises , unlike here, only at the end of the Brückleswiesen clearing from the confluence of the Ilgenbach and the creek from the Gewann Kalter Brunnen (here: Kalter Brunnenbach ). The initial section of the Holderbach, which is 3.2 km long downwards, which is around 1.9 km long up to that point, would therefore be its left upper course, Ilgenbach.

geography

course

The Holderbach rises about 1.3 km northeast of the center of the hamlet of Atzenrod in the small town of Langenburg, surrounded by fields in the Gewann Glaswiesen at about 477  m above sea level. NHN . There, a straight ditch running northeast begins abruptly, which after about a quarter of a kilometer passes an herbaceous wet meadow on the left bank, in which a tiny shallow pond is apparently fed by the ditch and drains into it again. After just over 0.3 km, the Holderbach enters the Weißbusch forest area , from where it mainly runs in the forest. There it flows in a more natural course, somewhat winding, 1–3 meters wide and partly with branches with still little gradient and turns to the northwest. A little later he walks, now straightened again, along the border of the alluvial wood in the northeast to the southeast bay along a large forest clearing in which there are predominantly fields. Where this bay is connected to the southwestern part of the clearing Lückenwiesen , a first larger side ditch flows from this, unstable like the Holderbach itself here, after which the Holderbach enters the Brückleswiesen clearing widening through a corridor northwards , where it comes from a spring close to the course is fed. At the end of this flood peak, the Kalte Brunnenbach flows from the east-southeast , which runs 0.5–1.5 m wide through the Kalter Brunnen forest , rises from a spring of the same name and is also sometimes dry.

At only 442  m above sea level. NHN and after a third of its course, the Holderbach now begins its long course in a completely closed forest, on which it now digs itself more strongly into one of the typical limestone blades of the landscape . At first it runs north-north-west until the forest stream Hessenbach joins it from the north-east , after which it turns west. Up to six meters wide, it now flows more steeply in loops under forest slopes, from which it is fed by seepage and flowing springs, sometimes with sintering. In his stony bed there are sometimes larger blocks, on steep slopes stand over this steep bank. A larger inflow from the Holderklinge reaches it on this stretch of the route from the south-southeast. Less than a kilometer before the mouth, the valley slowly widens to the funnel, the middle slopes open up to meadows, while above and in the lower valley basin there is still forest and the stream flows more and more west-southwest. Where the forest stops in the Mulde at the transition to the Jagsttal, the stream from the Schneckenklinge flows in from the southeast , the most catchment area of ​​all tributaries. Then the L 1025, which runs on the edge of the floodplain, crosses the Holderbach on a bridge and this runs, still accompanied by a tree gallery, to about 278.9  m above sea level. NHN , below the Langenburg hamlet of Unterregenbach and above the village of Mulfingen, the community of Mulfingen , which will soon begin downstream , towards the middle Jagst from the right .

The 5.2 km long Holderbach flows about 198 meters below its source and has a mean bed gradient of about 38 ‰.

Catchment area

The Holderbach has a catchment area of ​​around 6.7 km², which is mainly located in the forest, which is interspersed with a number of partly moist clearings on the left of its large arch to the left. The highest point is on a small, plowed ridge a little southwest of the source, where the terrain is about 491  m above sea level. Reached NHN .

The catchment areas of the following neighboring waters are adjacent in turn:

  • The upper catchment area of ​​the Schindbach , which flows into the Jagst from the right at the foot of the Langenburger Talsporn , lies south of the aforementioned, only short ridge .
  • In the southwest the Reisichsbach flows a little downwards from this to the Jagst.
  • In the west, beyond the watershed, lies the immediate catchment area of ​​the Jagst, which there usually runs dry hollows up to the mouth of the Holderbach, and shortly after it the only short stream from the willow blade .
  • In the north and east the catchment area of ​​the somewhat larger Rötelbach borders, which in a wider curve than the Holderbach reaches the Jagst even further down; his Qielle is only about 1.3 km east of that of the Holderbach.
  • In the south, the area drains beyond another short watershed section back to the ridge over the Michelbach to the Brettach , a Jagst tributary far before the Schindbach and more important than all of the above.

From a natural point of view, the catchment area is part of the Kocher-Jagst Plains and is predominantly in the sub-area of ​​the Bartenstein-Langenburger Platten , with a small part near the mouth in the sub-area of ​​the Middle Jagsttal . Politically, the majority of the catchment area and in particular the entire portion on the left side of the large stream arch belongs to the small town of Langenburg . The neighboring municipality of Blaufelden has a smaller one , its area extends over a long section of the westward part of the stream to the right bank. Both municipalities are part of the Schwäbisch Hall district . In addition, a very small marginal strip of less than 0.1 km² in the Gewann Löffelstelzen right above the lower course belongs to the municipality of Mulfingen in the Hohenlohe district .

There are no settlement areas on the river or in the catchment area.

Towards the end of the 2010s, a dozen large wind turbines were erected in the forest area of ​​the Brüchlinger Wald around the Holderbach, for which quite large clearings were cut.The operation began in 2018.

Tributaries and lakes

List of tributaries and RiverIcon-SmallLake.svglakes from source to 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.

Source of the Holderbach at about 477  m above sea level. NHN in the Glaswiesen field to the northeast of Langenburg- Atzenrod . For the first half of the course, the stream flows in a slightly fluctuating direction overall north-northwest.

  • * RiverIcon-SmallLake.svgPasses a small, shallow pond in an herbaceous wet meadow to the left of the course just before it enters the forest and where Weissbusch gained at about 472  m above sea level. NHN , well below 0.1 ha. Before and after the pond, an arched channel connects it with the Holderbach.
  • (Stream from the Lückenwiesen ), from the left and southwest to about 450  m above sea level. NHN on the corridor between the clearings Lücken- and Brückleswiesen , approx. 0.8 km and approx. 0.5 km². Arises at about 475  m above sea level. NHN on the northern edge of the Lücke forest area to the Lückenwiesen clearing . Like the Holderbach itself, unstable around the point of its mouth.
  • Kalter Brunnenbach , from the right and east-southeast to about 442  m above sea level. NHN at the end of the field clearing Brückleswiesen , 0.9 km and approx. 0.6 km². Rises at about 468  m above sea level. NHN the Kalten Brunnen on the forest boundary between Langenburg and Blaufelden - Billingsbach .
  • Hessenbach , from the right and northeast to about 425.9  m above sea level. NHN , 0.6 km and approx. 0.5 km². Rises at about 464  m above sea level. NHN between the forest tubs of Oberem Tränkschlag in the northwest and Dachbühle in the southeast.
    At this tributary, the Holderbach bends towards the west.
  • (Bach from the Holderklinge ), from the left and south-southeast to about 382.6  m above sea level. NHN , 0.8 km and approx. 0.4 km². Arises at about 462  m above sea level. NHN about 0.3 km north of the forest hut in the clearing in the stork's nest .
  • (Stream from the snail blade ), from the left and southeast to about 293  m above sea level. NHN near the mouth after the forest emerges, 0.6 km and approx. 1.1 km². Arises at about 397  m above sea level. NHN in his blade.

Mouth of the Holderbach from the right and finally about east to about 278.9  m above sea level. NHN between Langenburg- Unterregenbach and Mulfingen - Eberbach just before the city limits in the middle Jagst . The Holderbach is 5.2 km long and has a 6.7 km² catchment area.

geology

On the wavelength plateau the greater part of the catchment area is a Lettenkeuper layer ( Erfurt Formation ) the shell to the deeper subsurface, the highest layer Upper shell of Holderbach and the Cold Brunnenbach just before its confluence at the end of Brückleswiesen reach, while the later left inflow from the holder blade reaches this comparatively earlier and the last from the snail blade already has its usual origin in it. The Holderbach reaches the Middle Muschelkalk below the Holderklingen inlet less than a kilometer and the lower one less than half a kilometer from its mouth.

The shell limestone in the area is karstified , which is indicated by the numerous sinkholes in the catchment area, which in the Römerschlag above the snail blade are grouped to form a dense sinkhole field in the border area Lettenkeuper / Muschelkalk, where small rivulets disappear in the bottom of the sinkholes. The instability of the water and in particular the alternation of water-bearing and dry sections of the water bed in the deep blades indicate seepage in karst fissures.

On the higher upper reaches, where the brooks still flow flat, for example in the area of ​​the large clearing divided into bays up to the Brückleswiese , Holocene washoff masses often lie broadly around the courses.

Two faults moving approximately from south-east to north-west are suspected, one in the area of ​​the curvature of the Holderbach to the west, one somewhat on the valley line of the snail's blade.

Nature and protected areas

A little east of the Holderbach-Oberlaufs in Weißbusch stands a group of old oaks outside in the Swiss pasture bay . In addition to the large, structured clearing a little downwards up to and including the Brückleswiesen, there are other, smaller, partly damp, clearings in the forest, especially in the Pfaffenschlag between Holder- and Schneckenklinge, where a channel also temporarily seeps away in a small spring channel far above the Holderbach valley. Above the lowest course there are grasslands and field hedges on the open slope.

The landscape protection area Mittleres Jagsttal with side valleys and adjoining areas comprises the predominantly wooded slopes to the left of the lower valley running westwards from the approaching Holderklinge, starting further down also the right ones. Above this, the small Mulfingen area part of the catchment area in the Löffelstelzen belongs to the immediately adjacent Jagsttal landscape protection area with side valleys and adjacent areas between the Schwäbisch Hall district boundary and the Krautheim / Schöntal municipality boundary . A small gusset of a water protection area on the right edge of the Jagst valley opposite Unterregenbach extends over the southwestern watershed to the Holderbach catchment area.

See also

Individual evidence

LUBW

Official online waterway map with a suitable section and the layers used here: Course and catchment area of ​​the Holderbach
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. ↑ a b c d e Height after black lettering on the background layer topographic map .
  3. ↑ a b c d Length according to the waterway network layer ( AWGN ) .
  4. ↑ a b Catchment area after the basic catchment area layer (AWGN) .
  5. ↑ Catchment area measured on the background layer topographic map .
  6. ↑ The area of ​​the lake measured on the background layer topographic map .
  7. ↑ Length measured on the background layer topographic map .
  8. ↑ Sinkholes, especially in the Römerschlag, partly after the Biotope layer .
  9. ↑ Protected areas according to the relevant layers, nature partly according to the biotope layer .

Other evidence

  1. ↑ a b Left upper course Ilgenbach to Wo Holderbach and Reisichsklinge-spring on the website of the local group Langenburg of the Swabian Alb Association , queried on August 21, 2019.
  2. ↑ 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)
  3. ↑ Page on the Langenburg wind farm on the EnBW website , requested on August 21, 2019.
  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. 6725 Gerabronn

Web links