Impact Basin Examples

Message: Examples of a Impact Basins

---

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: 3212
Revision Date: 09/15/2022