Laabach (Poniglbach)

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Laabach
Middle run at Zettling

Middle run at Zettling

Data
location Styria , Austria
River system Danube
Drain over Poniglbach  → Mühlgang  → Mur  → Drau  → Danube  → Black Sea
source Grazerfeld at Oberpremstätten
46 ° 58 '32 "  N , 15 ° 24' 17"  O
Source height 333  m above sea level A.
muzzle at Wernsdorf in the Poniglbach coordinates: 46 ° 54 '51 "  N , 15 ° 28' 31"  O 46 ° 54 '51 "  N , 15 ° 28' 31"  O
Mouth height 307  m above sea level A.
Height difference 26 m
Bottom slope 2.7 ‰
length 9.5 km
Catchment area 12.79 km²
Left tributaries Old Laabach
Communities Premstätten , Wundschuh

The Laabach is a left bank tributary of the Poniglbach in the Austrian state of Styria . It rises in the market town of Premstätten and flows through the southern Grazer Feld parallel to the Kaiserwald .

course

The Laabach comes to the surface on Otterwirtweg in the Ober premstätten district . According to the Digital Atlas of the State of Styria, its catchment area extends in the north to the Windorf pond . After the first kilometer of running, the stream , which has been straightened throughout, leaves the settlement area and crosses agricultural areas. From Bierbaum it runs in a south-south-west direction parallel to the Kaiserwald terrace . On the late meadows near Zettling , he records three episodic feeders, including the old Laabach. In Kasten (municipality of Wundschuh ) the Laabach is led a few meters along the state road 380 , then it crosses under the route of the Pyhrn motorway A 9 and joins the Poniglbach south of the Werndorf train station . With normal water flow, the creek to Kasten.

Flora and fauna

At the middle course of the stream there is a swamp meadow with the fever clover as a common representative. The round-leaved sundew was found embedded on peat moss lawns . Among the marsh grasses, the blackhead sedge , the border sedge and in the ditches the fox sedge , which thrive next to the shrubs of the bog willow, are the most common. In one of the little water-bearing tributaries from the Kaiserwald, the hair-leaved buttercup grows next to the ear willow and marshmallow typical of Pleistocene soils .

In 1995 zoologists discovered an occurrence of the bird azure virgin on the Laabach . The stream and its tributaries form an ideal habitat for this dragonfly species and are home to one of the most important populations in the Graz field. In 2013 the EU Commission proposed the designation of a Natura 2000 protected area “Laabach bei Wundschuh”. The damsel bird is placed under protection according to Directive 92/43 / EEC (Fauna-Flora-Habitat Directive) , which is why its habitats must be treated with particular care with regard to brook and embankment design and ditch clearance.

Water quality

In the late 20th century, some residents worried about the water quality of the stream. In 1999, member of the National Council, Andreas Wabl, sent a written request to the Federal Minister in charge, Wilhelm Molterer . A resident of the community of Zettling complained about contaminated well water and suspected a connection with a 30 cm thick, foul smelling layer of mud at the bottom of the stream. Wabl saw the discharge of polluted wastewater by the municipal WWTP in Unterpremstätten as the cause. The approval of the plant was given by the municipal council, although the Laabach has too little water for a permanent discharge and almost completely dries up during longer dry periods. According to a finding from 1990, the watercourse was then only ensured by the sewage treatment plant drain.

Downstream, the stream flows through the ice age gravel , which is used for the local water supply. Due to the high permeability and low storage capacity of the soil, contact with the groundwater cannot be ruled out, which would be particularly problematic in the event of heavy precipitation events. Because the brook was artificially deepened in the 1960s - in the area of ​​the former municipality of Zettling without a permit under water law - the bottom of the brook lies exactly at the level of the local groundwater level when the groundwater level is high. Wabl found it to be a violation of the sanctuary ordinance applicable in this area. Environment Minister Molterer was unable to share all of the concerns after consulting the Styrian state government.

Web links

Commons : Laabach  - Collection of images, videos and audio files

Individual evidence

  1. ↑ a b Digital Atlas of Styria: Waters & Water Information. State of Styria , accessed April 7, 2019 .
  2. ↑ Extract from the digital Styrian body of water index. State of Styria , accessed on April 3, 2019 .
  3. ↑ BMLFUW (ed.) : List of areas of the Austrian river basins: Mur area. In: Contributions to Austria's Hydrography Issue No. 60, Vienna 2011, p. 78. PDF download , accessed on April 3, 2019.
  4. ^ Helwig Brunner & Werner E. Holzinger: Nature and landscape in Unterpremstätten . In: Walter Brunner (Ed.): Unterpremstätten in the course of time . Self-published by the municipality of Unterpremstätten 1995, p. 673.
  5. ^ Heribert Reiter: Weitendorf - Wundschuh. In: Communications from the Natural Science Association for Styria , Volume 75, Graz 1939, pp. 188–214. Online PDF , accessed April 4, 2019.
  6. ↑ Werner Holzinger & Philipp Zimmermann: Population situation of the azure jungle bird Coenagrion ornatum (Selýs, 1850) in Styria and proposals for the designation of protected areas. ÖKOTEAM - Institute for Animal Ecology and Natural Spatial Planning, Graz , November 2006, pp. 37–40. Online PDF , accessed April 4, 2019.
  7. ↑ Natura 2000 site proposals from the European Commission. Umweltdachverband , May 30, 2013, accessed on April 4, 2019 .
  8. ↑ a b Andreas Wabl : Written request regarding wastewater disposal in the Unterpremstätten community. Vienna, March 23, 1999, answered by Wilhelm Molterer on May 21, 1999. Online , accessed on April 4, 2019.