Lower Trauntal
| Lower Trauntal | ||
|---|---|---|
 Northern edge of the lower Trauntal near Pasching |
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| location | Northern Alpine Foreland , Upper Austria | |
| Waters | Traun | |
| Geographical location | 48 ° 11 ' N , 14 ° 7' E | |
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| height | 360 to 270 m above sea level A. | |
| length | approx. 40 km | |
| surface | approx. 200 km² | |
The Lower Traun Valley is the valley of the Traun in the core area of the Alpine foothills in Upper Austria . It extends in the Traunviertel and Upper Austria central area , and also includes the Welser Heide .
The Lower Trauntal forms one of the 41 Upper Austrian spatial units .
geography
Location and landscape
The Lower Traun Valley extends from Linz southwest to Lambach in the northeast corner of the Salzkammergut , where the valleys begin to narrow. The Welser Heide as the core area, on the left bank of the Traun, forms a wide plain and is surrounded by the pre-alpine hill country. The boundaries of the spatial unit are in the north along the high terrace of the Traun, which accompanies the riedel of the watershed to the Innbach , in the south the height of the Traunleiten .
The area of the spatial unit is 223.85 km² and extends over around 40 km. The width is between 4 and 9 km. The deepest part of the area is at Linz Central Station at around 270 m above sea level. A. The highest area is around 360 m above sea level. A. at Lambach
Neighboring regions
The spatial unit is surrounded by the following Upper Austrian spatial units (clockwise, starting in the north): Inn- and Hausruckviertler Hügelland , Linzer Feld , Traun-Enns-Riedelland , Unteres Almtal , Ager-Traun-Terrassen and Traunschlucht .
These landscapes all also belong to the foothills of the Alps.
Communities
The spatial unit lies in the districts of Linz , Linz-Land , Wels and Wels-Land .
The following municipal areas are mostly or entirely in the Lower Traun Valley (in alphabetical order): Ansfelden , Edt bei Lambach , Gunskirchen , Holzhausen , Hörsching , Leonding , Marchtrenk , Pasching , Pucking , Oftering , Weißkirchen an der Traun , Traun and Wels
Geology and hydrography
The lower Traun Valley is the post-glacial erosion landscape of the Traun. The normal structure of the Alpine foothills's top clay - and ceiling gravel from the Günz- and Mindel glaciation about Schlier , a slaty rocks, sediments of the tertiary Molassemeeres . Here the Schlier has been removed, and gravel material has been deposited over it several times and eroded again. The space in which is structured high terrace ( Rißeiszeit ), the lower terrace ( Wurm Age ) and the recent Austufe ( Holozän / Postglacial), which was still flooded before the regulation of Traun.
The high terrace is located in the south west of Gunskirchen and in Hörschinger Feld to the north. It is a thick loess layer with loamy- silty cover layers on top. The soil is deep and agriculturally valuable.
The lower terrace includes the actual Welser Heide and areas east of Weißkirchen , and has dry gravel soils. It is characteristic that many of the northern tributaries of the Traun (such as Grünbach , Laaber Bach , Perwender Bach ) seep away here , originally in large waterlogged areas, now in artificially created gravel pits .
The Ausufe extends over a width of 1 km to 3 km in the Wels area, and merges with the Danube in the Linzer Feld . It is heavily influenced by the Traun regulation and the barrages of the Traun power plant chain ( Lambach , Marchtrenk and Pucking run -of-river power plants , smaller ones at the Wels and Kleinmünchner weirs ), but there are also backwaters and pond landscapes created by gravel mining.
Spatial planning characteristics
The most important location factors of the room unit are:
- Traun with wide low and high terrace and dense settlement area.
- This area is characterized by high loads from several traffic axes (e.g. Welser Autobahn , Westbahn and Hörsching Airport ), large industrial and residential areas (Wels) and intensive agriculture.
- Gravel mining in the Austufe and Niederterrasse is considered to be the most important gravel extraction in all of Upper Austria.
- The Traun is continuously regulated and largely dammed by power plants .
- The alluvial forest area is rich in species and structures. Here the ash forests dominate , spruce or hybrid poplar forests are very rare. Hot lands are frequent and species-rich, in some cases of international importance. There is also the diverse bird fauna.
- The stage has extensive cultural landscape elements . There are also gallery forests on streams that shape the landscape. Mainly used for arable farming and dense settlement.
- The Traunleiten terrace edge is mostly near-natural, forested to shape the landscape. Beech and maple- ash forests are dominant. There is a semi-dry lawn at the edge of the terrace.
- The agricultural low terrace is densely built up. Dry oak and hornbeam forests alternate with wet black alder forests. The area's few streams seep away in gravel pits.
- The raised terrace is also mainly used for agriculture, but has little structure. The east in particular is densely built (Pasching, Linz), otherwise hamlets are predominant. The high terrace is covered with loess .
- The spatial unit is low in precipitation and rather foggy.
structure
The room unit is divided into six sub-units:
- Alluvial forest and Traun river
- Cultural landscape of the Austufe
- Traunleiten (border with Traun-Enns-Riedelland)
- Agricultural low terrace
- High terrace
- Dense settlement and industrial areas
literature
- Office of the Upper Austrian Provincial Government, Nature Conservation Department (Ed.): Nature and Landscape / Guiding Principles for Upper Austria. Volume 1: Lower Trauntal spatial unit . Linz 2007 ( pdf [accessed on February 18, 2017]).
Web links
- Map of the Lower Trauntal spatial unit. In: DORIS . Retrieved November 30, 2014 .
- Lower Trauntal. In: Nature and Landscape in Upper Austria. Retrieved November 30, 2014 .
Individual evidence
- ↑ a b c d lit. Upper Austrian state government (ed.): Nature and landscape: Lower Trauntal . Linz 2007, characteristics of the spatial unit: A2 location and boundaries , p. 12 .
- ↑ a b c d lit. Nature and landscape: Lower Trauntal . Linz 2007, location factors: A5.1 Geology A5.2 Soil and A5.4 Water system , p. 20th ff .