Grafenbrunnen
| Grafenbrunnen | |
|---|---|
 Exit point of the Graefountain |
|
| location | |
| Country or region | District of Gotha ( Thuringia ) |
| Coordinates | 50 ° 52 ′ 20 " N , 10 ° 51 ′ 2" E |
| height | 260 m above sea level NHN |
| geology | |
| Mountains | Thuringian Basin |
| Source type | Karst spring |
| Hydrology | |
| River system | Elbe |
| Receiving waters | Weidbach → Apfelstädt → Gera → Unstrut → Saale → Elbe → North Sea |
Coordinates: 50 ° 52 ′ 20 ″ N , 10 ° 51 ′ 2 ″ E
The Gräfenbrunnen is a karst spring in the Thuringian landscape protection area Drei Gleichen .
geology
The source rises in the Wachsenburggraben, part of the Eichenberg – Gotha – Saalfeld fault zone , near the Drei Gleichen . Groundwater comes to the surface due to the damming effect of the widespread clay layers . The exit takes place at a height of 260 m above sea level. NN. The spring is the natural outlet of the fractured and karst groundwater outlet effective in the area . These include limestone , dolomite and sandstone . They form the lower aquifer horizon and are contained in the geological strata of Muschelkalk and Keuper . The fact also occurring clays , however, are considered to be almost completely waterproof. They represent low or low levels of groundwater .
The source stream leaves the source area in a northeasterly direction and joins the water of the drainage ditch from the two peat ponds at the foot of the Schlossleite after 440 m . After another 750 m, the stream flows into the Weidbach , which, coming from Mühlberg ( Mühlberger Spring ), flows a few kilometers further in Neudietendorf into the Apfelstädt . In earlier years, the spring is said to have had a large discharge , with about 2000 l / min. comparable to the Mühlberger Spring. The spring, which was filled in and drained in the 19th century, can only be recognized today by its outlet pipe. The source area is contained and equipped with a seating area and a resting place for hikers.
history
The source was first mentioned as Geffenbrunnen around 1600. It is then referred to as Grefenbrunnen on the land maps . The current name has been in use since around 1800. In the Middle Ages, the spring supplied Gleichen Castle with fresh water. It was transported over a distance of approx. 2000 m and with a height difference of 110 m by pack donkeys in water tanks, probably made of leather.
