Visual Dictionary Online


Powered by

gravity damclick to hear

Its huge mass resists the thrust of the water to prevent it from overturning or sliding; this type of dam is usually used to hold back large volumes of water.
gravity dam cross section of a gravity dam cut-off trench reservoir afterbay downstream face upstream face top of dam

cross section of a gravity dam click to hear

cut-off trench click to hear

Watertight structure that extends the foundations of the dam into the ground; it limits leakage and infiltration under the dam.

reservoir click to hear

Basin formed by the construction of a dam; it holds back a very large volume of water so that the flow rate can be controlled.

afterbay click to hear

Area of the watercourse where water is discharged after passing through the turbines.

downstream face click to hear

Usually sloping dam face on the afterbay side.

upstream face click to hear

Dam face on the reservoir side.

top of dam click to hear

Upper part of the dam that usually contains a roadway.