On-Demand Webinar: Inlet and Outlet Hydraulics for Spillways and Outlet Structures
Association of State Dam Safety Officials, 2021
This webinar will begin with an overview of hydraulic grade lines and head losses associated with outlet structures and spillways for dams. The hydraulic structure must be designed to carry the planned flow for the expected head and tailwater conditions. Selection of the most appropriate hydraulic outlet structure depends upon the design discharge and the controlled head where the controlled head is the change in water surface elevation that will occur as discharge passes through the structure.
It is important that the inlet be sized adequately to supply water to the spillway. The outlet conditions also affect the head-discharge relationship. The outlet must be sized properly so that the tailwater is deep enough to assist in energy dissipation, but not be located
Key Take-aways:
- Basics of hydraulic gradelines and the impact of headlosses.
- Concept of hydraulic control and factors that can impact the location of the control.
- Learn what inlet and outlet control represent.
- How performance of the spillway changes over life of the structure.
- Effect of tailwater submergence on the outlet conduit.
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Speaker(s): Art Miller
Revision ID: 2328
Revision Date: 08/19/2022