Most commonly used on the spillway of large dams for controlling the top water level. Can also used as a means of controlling water levels in channels. The normal method of operation is by mechanical hoist or hydraulic cylinders.
Advantages
Quick operation as they move in an arc.
The entire water load is transferred radially through the arms to the pivots which reduces hoist capacity compared to a Wheel Gate.
Gate bottom lip gives good hydraulic discharge profile.
