ASDSO Dam Safety Toolbox

Impact Basin Examples: Difference between revisions

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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|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.
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.
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File:ACBs_with_A-Jacks.jpg|Test
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)
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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.
File:IB6.jpg|Type VI impact basins placed side by side.
File:IB6.jpg|Type VI [[Impact Basins|impact basins]] placed side by side.
File:IB7.jpg|The end of this outlet conduit was constructed too close to the vertical hanging baffle resulting in intense sprayback. Lesson learned - follow design guidance!
File:IB7.jpg|The end of this outlet conduit was constructed too close to the vertical hanging baffle resulting in intense sprayback. Lesson learned - follow design guidance!
File:IB8.jpg|Hook Basin
File:IB8.jpg|Hook Basin

Revision as of 18:06, 27 April 2023


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.


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: 6791
Revision Date: 04/27/2023