What does a wicket gate do in a hydro dam?

Question: What does a wicket gate do in a hydro dam?

Answer: The wicket gate in hydroelectric dams is used to control the amount of water flowing from the penstock (essentially an intake tunnel) through the turbine. Essentially the more open the gate is the faster the turbine will spin and thus more electricity is being generated. It also means a fully closed wicket gate can be used to shut down turbines for maintenance. In the image below you can see the wicket gate for this particular turbine and how it increases or decreases the flow of water through the system based on how open it is.

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