Wartschenbach

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Wartschenbach
View of the Zettersfeld with the Wartschenbach (center)

View of the Zettersfeld with the Wartschenbach (center)

Data
location East Tyrol , Austria
River system Danube
Drain over Debantbach  → Drau  → Danube  → Black Sea
source Wartschenbrunn in the southeast of the Schobergruppe
46 ° 52 ′ 5 ″  N , 12 ° 47 ′ 40 ″  E
Source height approx.  2100  m above sea level A.
muzzle in the Debantbach immediately before its confluence with the Drau Coordinates: 46 ° 48 '35 "  N , 12 ° 50' 31"  E 46 ° 48 '35 "  N , 12 ° 50' 31"  E

The gorge of the Wartschenbach

The gorge of the Wartschenbach

The Wartschenbach is a brook in East Tyrol . It rises on the Zettersfeld and has a catchment area of ​​2.5 km 2 . The Wartschenbach forms the border between the communities of Nußdorf-Debant and Gaimberg over long stretches . Due to major mud damage , the Wartschenbach was secured by debris retention systems between 1980 and 1996.

course

The source area of ​​the Wartschenbach, the Wartschenbrunn, is located in the southeast of the Schobergruppe on the southern edge of the Zettersfeld at an altitude of about 2100 meters (municipality of Gaimberg). The Wartschenbach then runs steeply to the south and takes in the Stieralm stream at an altitude of 1550 meters from the west and the Raderbach at an altitude of 1440 meters from the east. The Wartschenbach runs through a gorge at an altitude of 1300 to 900 meters . Below a height of 700 meters, the Wartschenbach crosses the Wartschenbach settlement and is then diverted to the southeast along the main road. It ends in a catch basin east of a substation .

Geology and geomorphology

The Wartschenbach lies in an eastern branch of the Schober group, which consists of old crystalline . The mountain group was deformed in an Alpine style by building a shed and the rocks were subjected to diapthoresis. The rocks were also deformed by fracture tectonics. At the Wartschenbach this deformation is particularly evident in the eastern part of the hanging end complex. The old crystalline of the Schober group, formed by narrowing and young fracture tectonics, shows large faults in the area of ​​the Debant fracture and the Isel Fault, which as partial faults are related to the gorge area of ​​the Wartschenbach.

The remains of the glacial moraine landscape in the area of ​​the Schobergruppe form the basis of mudslides. During heavy rain, the clayey base of the moraine forms sliding zones, which subsequently begin to flow and can carry over layers of rock with them.

Mudslides

The Wartschenbach caused severe mudslides in populated areas three times in the 1990s. A major reason for the increased damage caused by the Wartschenbach was the destruction of the Zettersfeld in the course of the expansion of the ski area and the associated corrections to the terrain in the alpine area. Due to the natural changes in the catchment area of ​​the Wartschenbach, the runoff process accelerated and the retention capacity was largely lost in the case of heavy precipitation in the middle reaches due to severe erosion and simultaneous accumulation of bed load material.

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