Zellbach (Innerste)
| Zellbach | ||
 Zellbach in the Zellerfeld valley |
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| Data | ||
| location | Lower Saxony , Germany | |
| River system | Weser | |
| Drain over | Innerste → Leine → Aller → Weser → North Sea | |
| source | east of Clausthal-Zellerfeld | |
| Source height | 605 m above sea level NN | |
| muzzle | At Silbernaal in the innermost coordinates: 51 ° 48 '10 " N , 10 ° 17' 48" E 51 ° 48 '10 " N , 10 ° 17' 48" E |
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| Mouth height | 470 m above sea level NN | |
| Height difference | 135 m | |
| Bottom slope | 17 ‰ | |
| length | 8.1 km | |
| Catchment area | 17 km² | |
| Reservoirs flowed through | Hirschler pond, Oberer Pfauenteich, Middle Pfauenteich , Unterer Pfauenteich | |
| Small towns | Clausthal-Zellerfeld | |
| Residents in the catchment area | 15,000 | |
The Zellbach is an 8.1 km long brook in the Harz Mountains , which flows into the Innerste from the right near Silbernaal in the urban area of Clausthal-Zellerfeld in the Lower Saxony district of Goslar .
Origin of name
There is probably a parallel to the Cella monastery , which was located on the Zellbach in the Middle Ages. The brook was then called Tzelle , the word has its origin in the Germanic word kellu , which means something like "swampy water". According to old traditions, the Zellbach is said to have been called Hornbach . In a document from the 16th century, for example, the phrase "Zellbach, as the Hornbach is called" can be found.
course
The Zellbach rises at around 605 m above sea level. NN in the Upper Harz, southeast of Clausthal-Zellerfeld, near the federal highway 242 . The area of the source is also called Hirschler Brink and is located just under one kilometer northeast of the Innerstequelle . After just a few hundred meters, the Zellbach, together with some other nameless source streams, is dammed in the Hirschler Teich , a dam of the Upper Harz water reserve , which significantly influences the Zellbach along its entire length. Here the water is used today to produce drinking water.
After passing through the Hirschler pond, the water of the Zellbach flows into the upper peacock pond, from there into the middle peacock pond , and from there on into the lower peacock pond. All of these systems are part of the Upper Harz water shelf and continue to be operated today mainly for reasons of monument and nature conservation. The direction of flow of the Zellbach goes towards the northwest.
The bottom outlet of the Lower Peacock Pond is always slightly open and thus ensures that the river bed below always carries a few liters of water. From here the Zellbach continues in a north-westerly direction to the eastern urban area of the Clausthal-Zellerfeld district of Clausthal. Intensive mining activities in the past centuries, but also property expansions in the 20th century, have caused the Zellbach to be piped to a large extent or to be routed in a tunnel under the heaped-up area. Since some of this piping has not been adequately dimensioned, there are always problems with floods .
In the urban area of Clausthal, there is also the Eschenbach , a notable tributary from the right , which, like the Zellbach, has been greatly changed by mining activities and has also been dammed by several Upper Harz ponds . At the point of confluence there is also a discharge through an Oberharzer ditch , the Bremerhöher ditch, which discharges a large part of the runoff here at low tide.
On the stretch of the river between the Untere Pfauenteich and the old train station, the Zellbach is still called Hornbach by many residents today.
In the area of today's roundabout, the direction of flow bends towards the west. Here the Zellbach forms the border between the formerly independent towns Clausthal and Zellerfeld for a few hundred meters. After passing the old train station , the Zellbach finally runs as an open river. A partial flow is introduced into the Eulenspiegler pond as a bypass at this point . To the west of the Eulenspiegler pond, the direction of flow bends towards the southwest and the Zellbach receives some smaller tributaries from the area of the colliery ponds and the Carler pond.
The Zellbach now flows through the Zellerfeld valley in a south-westerly direction. At this point it is bounded on the left by a Pochsandhalde from mining, on the right by the district road K 37. In addition, there is a derivation in the 4th Pochgraben, which is used today for energy generation. In the area of the Zellerfelder valley and below, the Zellbach has an unusually high water quality for the district of Goslar.
Another tributary below the Zellerfelder valley is a brook from the Großer Clausthal, which to a large extent also ran underground.
Between Frankenscharrnhütte and Silbernaal, the Zellbach flows into the innermost. At this point it is actually the richer river.
Water management and geology
The Zellbach has already been massively changed a few hundred meters below the source due to mining and settlement activities. In the area of the Zellerfeld valley, however, it shows water quality classes I - II.
Due to the Upper Harz mining activities , in particular due to the proximity to several dumps from mining and smelting that are classified as contaminated sites , the Zellbach has significantly increased heavy metal values for the parameters zinc, lead, cadmium and copper.
The geology of the catchment area is otherwise characterized by the typical resin alternation of slate and greywacke.
Web links
- NLWKN Water Quality Report 2000 (PDF; 8.33 MB, accessed on October 14, 2012)