Hilsbach (Elsenz, Unterlauf)

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Hilsbach
upper course name: Forellenbach
Hilsbach (Elsenz, Unterlauf) -002.JPG
Data
Water code DE : 2389892
location Sandstone Odenwald

Baden-Württemberg

River system Rhine
Drain over Elsenz  → Neckar  → Rhine  → North Sea
source Kleiner Roßbrunnen approx. 0.8 km northeast of the clinic in Heidelberg- Kohlhof
49 ° 23 ′ 37 ″  N , 8 ° 44 ′ 49 ″  E
Source height approx.  430  m above sea level NHN
muzzle at Neckargemünd- Kriegsmühle from the left and finally west in the lowest Elsenz coordinates: 49 ° 22 '12 "  N , 8 ° 47' 20"  E 49 ° 22 '12 "  N , 8 ° 47' 20"  E
Mouth height approx.  119  m above sea level NHN
Height difference approx. 311 m
Bottom slope approx. 62 ‰
length 5 km
Catchment area 6.514 km²

The Hilsbach is about five kilometers long creek on the southeast slope of the Königsstuhl in northwestern Baden-Württemberg , which flows into the lowest Elsenz from the left at the war mill of Neckargemünd in the Rhein-Neckar district . In the upper reaches of the city of Heidelberg it is called the trout stream .

Another Hilsbach also flows to the Elsenz from the left on the upper reaches in Eppingen .

geography

course

The trout stream rises at about 430  m above sea level. NHN of the source Kleiner Roßbrunnen in the forest on the Königstuhl about 0.8 km northeast of the clinic at Heidelberg Kohlhof and about 0.3 km west of the Kraussteinhütte. On the slope, the water runs downhill for a good hundred meters and then at least partially feeds the Grosse Roßbrunnen on an outgoing forest path a few meters from a serpentine lap of the K 9710 from Kohlhof to Waldhilsbach. There are fenced water catchment systems below the serpentine. The stream valley, which is deeply deepened from there, now runs south-east, often with rubble on the bottom and with some strong springs near the stream bed.

About half a kilometer after the source, before crossing the valley, a forest path with a heavily pouring well flows along the path at about 333  m above sea level. NHN from the west to the 0.9 km long Michelsbrunnengraben . It arises at about 430  m above sea level. NHN around a hundred meters east of the Gasthaus am Kohlhof. Its often dry creek channel initially runs in loops through a flat pasture until it enters the forest and receives an inflow from the Michelsbrunnen in a small nature reserve on the slope with a lot of block debris. This tributary contributes a partial catchment area of ​​approx. 1.1 km².

After a little over half of its course, the stream leaves the forest and the Heidelberg urban area and flows through the Neckargemünder village of Waldhilsbach . From there it is now called Hilsbach . In the village, the brook initially continues in a south-easterly direction, partly underground.

Almost at the lower end of the village it then increases to about 190  m above sea level. NHN from the right and west-northwest the outflow of a ditch from the corridor in Hammelsgrund , which is located in the clearing island around the village. This approx. 1.1 km long inflow has a catchment area of ​​approx. 0.5 km² and is already verdolt before it enters the town.

After the village, the Hilsbach changes to the east run through a steep Kerbtal again in the forest between the Bammentaler Bammertsberg in the south ( 249.9  m above sea level ) and the 265.9  m above sea level. NHN high foothills of the Neckargemünder Neckarriedkopf in the north; he is on this section Grenzbach between the two municipalities. After about a kilometer, it reaches the narrow floodplain at the war mill of Neckargemünd under the Elsenz Valley Railway and the B 45 across from the elongated Holmut , where it is about 119  m above sea level. NHN flows from the left and finally west into the lowest Elsenz .

At the end of its 5.0 km long path, traversed with an average bed gradient of about 62 ‰, the watercourse from Forellenbach and Hilsbach flows about 311 meters below the source of the Kleiner Roßbrunnen.

Catchment area

The Hilsbach drains an area of ​​6.5 km² on the southeastern slope of the small Königstuhl massif, which is part of the natural area of the sandstone Odenwald .

The course begins in the Middle Buntsandstein and changes in the area of ​​the village Waldhilsbach to the Upper Buntsandstein , where mostly loess sediment from Quaternary Aeolian deposits lies in the slipstream of the Königstuhl. At the lower end of the village, a small island of Lower Muschelkalk has been preserved. In its lower canyon, the stream deepens again into the Middle Buntsandstein before it flows into the narrow flood sediment band of the Elsenz. Through Waldhilsbach the valley course follows a tectonic fault line running from north-northwest to south-southeast.

The highest point in the catchment area is 567.8  m above sea level. The summit of the Königsstuhl reaching the NHN in the north-west. The highest parts of the catchment, except where this side of its border no permanent rivers are like on the other side, but the drainage ultimately the Neckar below the achieved Elsenz estuary, compete behind the right and southeastern watershed of Weihwiesenbach with its headwaters Krebsbach to Elsenz in Bammental a little above the war mill and behind the left and northeast of the Kümmelbach to the Neckar immediately after the Elsenz.

There is forest on three quarters of the catchment area. Only the clearing island around Waldhilsbach and the much smaller one around the Kohlhof are open. In both orchards and pastures dominate. Settlement on the Lauf is limited to Waldhilsbach and a gusset at the mouth with a few houses from the Neckargemünder war mill on the left and a group of houses from Bammentals on the right bank. In the catchment area there is only the Heidelberg Kohlhof.

nature and environment

The entire catchment area lies in the Neckartal-Odenwald nature park . Shortly after its source, the trout stream enters a biotope with old beech trees. Its water is still classified as unpolluted in this area and then classified as critically polluted in the area of ​​the Kohlhof sewage treatment plant. To the east of Kohlhof, at the Michelsbrunnen, is the small Michelfeld nature park with orchards and meadows. It is part of the non-contiguous nature reserve Felsenmeer, Russenstein, Michelsbrunnen Nature Park .

In its catchment area, Schlankseggenriede thrive on the wet and loamy clay soils .

The valley and the left catchment area down to the city limits of Neckargemünd belong to the Königstuhl forest protection 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 Hilsbach
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. ↑ Length according to the waterway network layer ( AWGN ) .
  3. ↑ Catchment area according to the basic catchment area layer (AWGN) .
  4. ↑ a b Length measured on the background layer topographic map .
  5. ↑ a b Catchment area measured on the background layer topographic map .
  6. ↑ a b Height according to black lettering on the background layer topographic map .
  7. ↑ Protected areas according to the relevant layers.

Other evidence

  1. ↑ Josef Schmithüsen : Geographical land survey: The natural space units on sheet 161 Karlsruhe. Federal Institute for Regional Studies, Bad Godesberg 1952. →  Online map (PDF; 5.1 MB)
  2. ↑ Geology roughly based on: Map server of the State Office for Geology, Raw Materials and Mining (LGRB) ( notes )
  3. ↑ Landscape plan for the area of ​​the Heidelberg-Mannheim neighborhood association , August 1999 (PDF, 3.65 MB).

literature

  • Topographical map 1: 25,000 Baden-Württemberg, as single sheet No. 6518 Heidelberg North (only for a single area gusset without running) and No. 6618 Heidelberg South

Web links