Severe flooding on the Danube in recent years has revealed the somewhat poor condition of the Marchfeld protection dam and its backwater dams. viadonau is therefore carrying out reconstruction of these dams and making state of the art modifications in order to ensure more reliable protection.
The use of a dam sealing wall will successfully prevent water seepage through the dam in the future. A flexible protective layer protects the dam from breaches caused by the buoyancy of groundwater. The dams can therefore reliably withstand any possible flooding. Nevertheless, the groundwater can, as before, flow freely in the floodplains and wetlands. In addition, wall defence pathways will be created to allow the emergency services to reach the dam easily in cases of flooding.
This design has already been implemented successfully in the reconstruction of the flood protection dam on the river Morava and is also being deployed in the project "Restoration flood protection Danube - Marchfeld, Hainburg, Wolfsthal".
The conservation of fragile habitats is considered to be an important integral part of any construction project. Construction plans of individual sections of the Danube are therefore made which give due consideration to the rare amphibians, reptiles, and birds living in the region. The erection of protective barriers make it possible to protect, for example, frogs and toads before construction work begins.