Danube Sediment Removed by Felbermayr’s Hydraulic Engineering Team in Vienna
The Danube Island in Vienna is especially well-known as an event venue and is a popular recreation area for people living in Vienna. Relatively unknown is the fact that the Danube Island, with its numerous side arms and a length of 21 kilometres, is an extremely valuable habitat for more than 40 different fish species, hundreds of plant species and countless amphibians. The inlets on the Danube Island in Vienna and its natural ecosystem are therefore particularly worthy of protection.
Climate change and associated phenomena such as flooding and drought are putting a strain on the ecosystem. The EU project entitled “Life Danube Island Climate Change Adaptation” is contributing to the protection and preservation of biodiversity through numerous measures.
In order to perform the dredging properly, the rapidly expanding hydraulic engineering division used several types of special equipment.
Divisional Manager Hans Wolfsteiner from Felbermayr’s hydraulic engineering division: “The F 131 large-capacity push barge was used, which was coupled to a hopper barge with a capacity of 300 metres and the “Theresa” push-boat. A 200-tonne rail-mounted Liebherr HS 895 cable excavator with a 40-metre long boom and a ten cubic metre grabber were set up on the large-capacity push barge.”
The cable excavator was used to scoop up the silt from a depth of twelve metres and to temporarily store it in the large-capacity push barge for further transport.
The material was transported away via appropriate lines by means of the pumping system on the push-boat, some was pumped into the middle of the Danube and some was also flushed into the storage area at the Freudenau power station. Material that could not be pumped was loaded onto trucks on the river bank and transported to landfills, where it is properly processed.
“Hydraulic excavators, some with long-reach equipment, were additionally used to assist in some side arms”, adds Wolfsteiner.