Holdup funnel
In civil engineering, an overflow funnel or overflow tulip is a funnel-shaped device for flood relief .
Just above the storage destination to a spillway storm placed which serves attack funnel as overflow at high water levels . At higher water levels , the excess water falls into the overflow and is drained away by the flood relief tower.
Often flow pillars are attached to the overflow funnel to improve the flow behavior . Hopper hoppers must be designed so that they will not slam, i.e. H. from the gravity drain to the pressure drain, as the flow resistance then increases significantly and the flow rate can only be increased significantly by increasing the pressure (→ Hagen-Poiseuille's law ). In other words: the inside of the hopper must be sufficiently wide.
The largest raid funnel on Lake Berryessa is also known as the Glory Hole .
Hopper at Ladybower Reservoir in normal condition
... and in case of overflow
Raid hopper of the Hungry Horse Dam (1953)
Web links
Individual evidence
- ↑ Detlef Aigner: Raids . In: Dresdner Wasserbauliche Mitteilungen . No. 36 , p. 162-176 ( [1] [PDF]).
- ↑ DTK (ed.): Dams in Germany . Springer-Verlag, 2013, ISBN 978-3-8348-1447-0 , pp. 16 , doi : 10.1007 / 978-3-8348-2107-2 .