Fils origin
| Fils origin | ||||
|---|---|---|---|---|
 Karst spring Filsursprung in the valley floor of Hasental (dry valley) |
||||
| location | ||||
| Country or region | District of Göppingen ( Baden-Württemberg ) | |||
| Coordinates | 48 ° 32'58 " N , 9 ° 36'9" E | |||
| height | 625 m above sea level NHN | |||
|
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| geology | ||||
| Mountains | Swabian Alb | |||
| Source type | Karst spring | |||
| rock | White Jura | |||
| Hydrology | ||||
| River system | Rhine | |||
| Receiving waters | Fils → Neckar → Rhine → North Sea | |||
| Bulk | 160 l / s | |||
Coordinates: 48 ° 32 ′ 58 " N , 9 ° 36 ′ 9" E
The Filsursprung is a karst spring near Wiesensteig , on the Middle Swabian Alb in Baden-Württemberg . It forms the origin of the Fils , which in a dry valley , the Hasental, at 625 m above sea level. NN rises.
geography
The traffic-free Hasental, which branches off from the Schopfloch –Wiesensteig road, is a popular hiking route. After hiking through the 4 km long, downhill dry valley , a valley without any rivulet or other surface drainage, always through fields and meadows, bordered on both sides by mixed forest, you reach the Fils, which rises from several gravel areas of the valley floor . This emerges from a so-called layer source. The brook meanders through another 1.5 km of a meadow valley to the first houses in the village of Wiesensteig .
geology
The dry valley and the Filstal to Geislingen / Steige are parts of the Ur-Fils , which flowed into the Ur-Lone , which drains southwards . (The old river system of the so-called Tübingen and Cannstatter Ur-Lone drained the south-west German layer basin - from the Neckar to the Molasse basin of the Alpine foothills, more recently, after the formation of the Urdonau , up to it. Erosion of the Alb eaves to the south and increased crust bulges in the course of the folding of the Alps reversed the drainage direction of rivers so that they drained to the Upper Rhine Rift. An upper part of the old river system of the Ur-Lone became the so-called "Rheinische Fils".
Because of the great relief energy (force of a steep gradient) to the Rhine , the Rheinische Fils shifted its source positions continuously further south due to retrograde erosion . Since the relief energy to the Danube (i.e. to the much longer drainage route) was lower, the source positions of the Rhenish Fils reached the Ur-Fils in such a way that they could tap them and divert them to the northwest. This river tapping took place at the latest at the time of the Riss glaciation (approx. 700 thousand years ago ) . As a result of progressive karstification , the upper reaches of the Ur-Fils finally became a large dry valley, further down a very small source Fils remained.
While a wide river bed of the Tübingen-Cannstatter Ur-Lone originally drained all of southwest Germany, the river bed south of Geislingen / Steige was later only the bed for a Ur- Eyb and the Ur-Fils. After the Ur-Fils and Ur-Eyb rivers tapped through the Rhenish Fils near Geislingen / Steige, part of the Ur-Lone valley (south of Geislingen / Steige to Urspring / Lonsee ) became a dry valley. Today the Lone trickle flows through the large Lone Valley , which emerges in a karst spring , the spring pot near Lonsee.
The Filsursprung pours 50–240 liters per second (average 160 l / s). After only 2 km, the Fils in Wiesensteig can be reached up to max. 4000 liters / s of water. The source rises in the border area of the layers of the White Jura (Malm) (Wα / Wβ, or ox1 / ox2). The non-karstified layer of Lower Weißjuramergel (Wα) has a water-retaining effect. Tufa limestone is deposited in the entire upper Filstal . Approx. 5.5 km after the source there is an inaccessible tufa cave near Mühlhausen .
The Fils industrial river, which is now only moderately polluted, flows into the Neckar at Plochingen after 63 km and a total of 377 m gradient .
Small fils origin
| Small fils origin | |
|---|---|
| Coordinates | 48 ° 33 '5 " N , 9 ° 36" 10 " E |
Another karst spring emerges about 200 m north of the Fils origin. It is called Kleiner Filsursprung . The spring water rises from some crevices in the rock along the way. The outflowing “Kleine Fils” runs parallel to the hiking trail for a few meters and then flows into the Fils from the right .
See also
Individual evidence
- ^ H. Dongus: The surface forms of the Swabian Alb and its foreland; Marburg Geogr. Studies 72; Marburg 1977.
- ↑ M. Strasser, A. Sontheimer: The Laierhöhle and the Ur-Lone - an overview of the history of the landscape . in: Mitteilungsblatt des Kahlensteiner Höhlenverein, 38; Bad Überkingen 2005, p. 85 ff., Cf. Web link to geomorphology.
- ↑ H. Binder: On the geology and river history of the Lonetales . Ulmer Geographische Hefte, 5, p. 6 ff.
- ↑ H. Binder, H. Jantschke: Höhlenführer Schwäbische Alb . Leinfelden-Echterdingen 2003, 7th edition.
- ↑ State Institute for the Environment, Measurements and Nature Conservation Baden-Württemberg, Water Quality Map 2004
- ↑ Geodata Infrastructure Baden-Württemberg
