Rubble barrier

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Boulder barrier at Hallstätter Mühlbach; originally built in 1885 and expanded in 2018

Boulders made of natural stones

A rubble barrier (bed load barrier) is a dam system with a flow (mostly in the upper and middle reaches of a river), which serves to hold back solids and reduce the flow velocity. It is mainly used to contain mountain streams with steep river beds or to prevent them from digging further into the terrain.

As a rule, the rubble barrier fills over time with material that the river brings with it. In contrast to a weir , a rubble barrier does not necessarily have to be cleared (dredged) from the deposits of the river. It fulfills its purpose - reducing the flow velocity - when it is overflown. However, if it is primarily used to hold back rubble or debris , it must be emptied regularly.

See also

• Water correction , torrent control

literature

Norms:

• ONR 24800–3 protective structures for the torrent control

Web links

Commons : Boulders  - Collection of pictures, videos and audio files

• Protective structures: Working groups at the Austrian Standards Institute . University of Natural Resources and Life Sciences, Vienna, Department for Structural Engineering and Natural Hazards, Institute for Structural Engineering (IKI) - with a graphic overview of the construction of torrent barriers