Gronbach (Speltach)

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Gronbach
Data
Water code DE : 23881632
location Swabian-Franconian forest mountains

Baden-Württemberg

River system Rhine
Drain over Speltach  → Jagst  → Neckar  → Rhine  → North Sea
source approx. 1.1 km east-north-east of the church of Oberspeltach at the beginning of its forest blade in the Hörle forest
49 ° 6 ′ 20 ″  N , 9 ° 59 ′ 38 ″  E
Source height approx.  453  m above sea level NHN
muzzle 0.7 km below the confluence of Buchbach and Lanzenbach near Oberspeltach to Speltach from the left and north-northeast in these coordinates: 49 ° 5 '56 "  N , 9 ° 59' 16"  E 49 ° 5 '56 "  N , 9 ° 59 ′ 16 ″  O
Mouth height just under  419.2  m above sea level NHN
Height difference approx. 33.8 m
Bottom slope approx. 35 ‰
length 968 m
Catchment area approx. 50 ha

The Gronbach is a creek about one kilometer long on and then near the border between Oberspeltach and Gründelhardt in the municipality of Frankenhardt in the district of Schwäbisch Hall in north-eastern Baden-Württemberg , which is less than a kilometer downstream from the Oberspeltach outskirts from the left and north-northeast into the upper Speltach opens.

geography

course

The Gronbach arises at about 453  m above sea level. NHN approx. 1.1 km east-northeast of the church of Oberspeltach a little south of the fields in the Gewann Eichwald in the forest Hörle at the beginning of its forest klinge . The Gronbach flows slightly meandering on the upper reaches of the forest on the bottom of this deepening little Kerbsohlentales southwest. Its sandy to muddy bed, accompanied by alder trees, is usually half to three quarters of a meter wide. In places it runs even wider and shows wallowing .

After a good third of its way, at the exit of the forest from the right and north, it takes the short course of a small pond with a considerable catchment area, which lies at the exit of a roughly parallel small blade. There it bends to the left and now flows southwards, initially still semi-naturally along the western edge of the Hörle forest , then for the last 400 meters in the flat Speltachaue in an almost straight, grassy small ditch that crosses the K 2665 Oberspeltach– Fichtenhaus .

Finally, the Gronbach flows out at just under 419.2  m above sea level. NHN and thus about 34 meters below its origin after a 1.0 km long run with a mean bottom gradient of about 35 ‰ from the left into the upper Speltach , about 0.7 km after the confluence of the Speltach upper reaches on the southern edge of Oberspeltach and less than 0.2 km before the next left river inlet Breitbach , which also comes from the Hörle.

Catchment area

The Gronbach has a catchment area of ​​about 0.5 km², the highest point of which is on the northern edge of the tree line through the forest-corridor-Gewann Eichwald on a knoll northeast of Oberspeltach near a water reservoir 485.2  m above sea level. Reached NHN . From a natural perspective, it is located entirely in the lower area of ​​the Burgberg Vorhöhen and Speltach Bay of the Swabian-Franconian Forest Mountains . In this part of the Keuperbergland , the lowest layer of the Middle Keuper , the Gipskeuper ( Grabfeld Formation ), is everywhere . Clearly above the source of the brook on the summit mentioned and also at the foot of the slope to the Speltachaue are layered layers above them, in the Speltachaue the alluvial loam band accompanying the small river.

Beyond the northern watershed on the ridge of the oak forest lies the headwaters of the Aspenbächles , a tributary of the Maulach , which flows into the Jagst a little after the Speltach . The Hörlesbach , which feeds the downward Speltach as well as the very close Breitbach in the east, borders briefly in the northeast. Behind the western watershed to the left Speltach-Oberlauf Lanzenbach this is itself the next open watercourse.

The area belongs to the community of Frankenhardt and almost entirely to its Oberspeltach suburb, the remaining tenth to the left of the creek in the Hörle to the suburb of Gründelhardt . This part and a forest ledge over the northern watershed around the mentioned water reservoir, about a further twentieth of the total area, are the only wooded parts, the rest is open, uninhabited corridor, which is at the height above the Hörle forest in the Gewann Hart , which is on the Speltach valley slope and in the open part of the Gewann oak forest is plowed, while below on the open part of the upper slope and then again close to the Speltach there are meadows.

Tributaries and lakes

  • (Pond runoff), from the right and north-northeast to about 435  m above sea level. NHN at the exit of the Gronbach forest, approx. 0.1 km and over 0.2 km². Flows at about 440  m above sea level. NHN a tiny pond on the western edge of the Hörles to the open Gronbachfeld .

See also

Individual evidence

LUBW

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

  1. ↑ Height according to the contour line image on the topographic map background layer .
  2. ↑ a b Height according to black lettering on the background layer topographic map .
  3. ↑ Length according to the waterway network layer ( AWGN ) .
  4. ↑ a b Catchment area measured on the background layer topographic map .
  5. ↑ Nature partly according to the biotope layer .
  6. ↑ Length measured on the background layer topographic map .

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 )

literature

  • Topographic map 1: 25,000 Baden-Württemberg, as single sheet No. 6825 Ilshofen

Web links