Diversion (hydraulic engineering)
A diversion in hydraulic engineering is the diversion of the flowing water . This is done on the one hand to enable civil engineering work after the actual construction area has been drained , since the drainage is necessary for certain construction work, and on the other hand to avoid sedimentation above the barrier structure .
Implementation of a diversion measure
On both sides of the flowing water , so-called diversion tunnels are driven by a tunnel boring machine or blasted into the valley flanks. This must be designed in such a way that the water is diverted around the actual building site over a length of about one kilometer. As a rule, this takes place starting below the actual flow level.
Such work was carried out at Hoover Dam , for example , so that the foundation for the dam could be poured. The same applied to the construction and construction of the Drei-Schluchten-Damm or the Okertalsperre , but also during excavation work with a dredger it can be useful to divert a river through another branch , also to protect designated wetlands more effectively.
Other diversion
Another meaning of the term is the diversion in which shipping is diverted from flowing waters ( rivers ) to other waterways ( canals ) and in which rivers are straightened and canalized. In Limburg an der Lahn there is a water tunnel , which canoes and boats at the city's barrage passes. A so-called water tunnel can also be used to divert sediments and sedimentary rocks at dams , or an underground channel .
Web links
- The Civil Engineer, Volume 20 (1939) online version
- Mensch, Maschinen, Mechanismen, 2000 Brockhaus-Verlag online version ISBN 978-3765379444