Traisen - Living space in the estuary stretch of the river Traisen

LIFE07 NAT/A/000012

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Contact details:

Project Manager: Gerd FRIK
Tel: +43 (0)50313 50610
Fax: +43 664 8286328
Email: gerd.frik@verbund.com

Project description:


The River Traisen, one of the largest Danube tributaries in Lower Austria, runs for 7.5 km as a regulated, straight-line channel through the Natura 2000 site, Tullnfelder Donau-Auen. This site is the largest alluvial forest in Austria. However, the River Traisen is a heavily modified water body following the construction of the hydropower plant, Altenwörth, in 1976. The regulated river is missing aquatic and terrestrial habitats that are usually found on flood plains. The connection between the river and the surrounding riparian forest is cut off. This situation leads to an unfavourable conservation status for the whole Natura 2000 site. High waters of the regulated Traisen rarely reach the surrounding habitats because of flood protection dams.


The main project objectives are to:

  • Create a new and dynamic river bed;
  • Restore large-scale flooding zones to restore and maintain the alluvial forest priority habitat type 91E0 with typical white willow woods;
  • Link numerous floodplain waters to the new main river;
  • Create a free passage for fish and other water species.
  • The project is expected to implement its measures on a 12.5 km stretch of the meandering River Traisen with dynamic banks and natural riparian forest areas. It is also expected to create a new running water habitat at mean-flow of some 69 ha, where dynamic riparian development can take place. The project foresees the creation of:

  • Various natural river structures in the riparian area between water and land;
  • Some 82 ha of frequently flooded areas, which are suitable for the restoration of the priority habitat type of white willow woods (91E0). It will Increase this habitat type in the target area from 6% to approximately 100%;
  • Stagnant water zones to enrich the water variety of the floodplain by 12 ha;
  • Fish passable cross-links on the floodplain area and various existing water bodies with the new River Traisen and the Danube. This will make permanent fish migration possible in the new River Traisen. At least 40 fish species will benefit from this measure, of which 25 species are listed in annex II of the Habitats Directive.



Environmental issues addressed:


Habitats - Freshwater


forest ecosystem‚  protected area‚  river‚  restoration measure

Target Habitat types

  • 91E0 - "Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae)"

Natura 2000 sites

Not applicable



Coordinator Verbund- Austrian Hydro Power AG
Type of organisation International enterprise
Description The coordinating beneficiary, Austrian Hydro Power, is a subsidiary company of Austria's leading electricity company, Verbund, and one of Europe's leading hydropower companies. AHP operates 88 hydropower plants in Austria and employs 1 100 people.
Partners BWV Niederösterreich, Austria Via Donau, Austria


Project reference LIFE07 NAT/A/000012
Duration 01-JAN-2009 to 31-DEC -2019
Total budget 12,841,632.00 €
EU contribution 5,297,173.00 €
Project location Niederösterreich(Österreich)


Read more:

Project web site Project's website (DE)


Project description   Environmental issues   Beneficiaries   Administrative data   Read more   Print   PDF version