Impact Basin Examples: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Category:Accounting for Energy Dissipation Outlet Works]] | |||
---- | |||
<!-- Add body paragraphs here --> | <!-- Add body paragraphs here --> | ||
Energy dissipation in an impact basin is accomplished through the turbulence created by the loss of momentum as flow entering the basin impacts a baffle, and the direction of the flow is changed. At high flow, further dissipation is produced as water builds up behind the baffle to form a highly turbulent backwater zone. | Energy dissipation in an impact basin is accomplished through the turbulence created by the loss of momentum as flow entering the basin impacts a baffle, and the direction of the flow is changed. At high flow, further dissipation is produced as water builds up behind the baffle to form a highly turbulent backwater zone. | ||
| Line 14: | Line 11: | ||
File:IB1.jpg|Type VI Impact Basin Structure (image courtesy www.precon.ca) | File:IB1.jpg|Type VI Impact Basin Structure (image courtesy www.precon.ca) | ||
File:IB2.jpg|Type VI Impact Basin Structure (image courtesy www.precon.ca) | File:IB2.jpg|Type VI Impact Basin Structure (image courtesy www.precon.ca) | ||
File:IB3.jpg|Construction of Type VI Impact Basin structure (image courtesy www.precon.ca) | File:IB3.jpg|[[Construction]] of Type VI Impact Basin structure (image courtesy www.precon.ca) | ||
File:IB4.jpg|Layout for a Type VI Impact Basin | File:IB4.jpg|Layout for a Type VI Impact Basin | ||
File:IB5.jpg|Impact Basin with flow being discharged. | File:IB5.jpg|Impact Basin with flow being discharged. | ||
Revision as of 03:26, 2 December 2022
Energy dissipation in an impact basin is accomplished through the turbulence created by the loss of momentum as flow entering the basin impacts a baffle, and the direction of the flow is changed. At high flow, further dissipation is produced as water builds up behind the baffle to form a highly turbulent backwater zone.
The type VI impact basin is a relatively small structure with highly efficient energy dissipation characteristics. This type of energy dissipation structure does not require tailwater control.
-
Type VI Impact Basin Structure (image courtesy www.precon.ca)
-
Type VI Impact Basin Structure (image courtesy www.precon.ca)
-
Construction of Type VI Impact Basin structure (image courtesy www.precon.ca)
-
Layout for a Type VI Impact Basin
-
Impact Basin with flow being discharged.
-
Type VI impact basins placed side by side.
-
The end of this outlet conduit was constructed too close to the vertical hanging baffle resulting in intense sprayback. Lesson learned - follow design guidance!
-
Hook Basin
-
Standard Baffle Basin
-
Basin utilizing staggered rows of baffles.
Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.
Revision ID: 4758
Revision Date: 12/02/2022