A device located in the base of a channel of running water that dissipates the energy of the flow. The dissipater reduces the velocity and depth by spreading the water flow over a larger area and thus mitigates erosion in the channel bed. Energy dissipaters can be constructed in several forms and from different materials including rocks, gabions, logs, steel baffles and concrete blocks.

a device used to reduce the energy of flowing water

A device used to reduce the velocity or turbulence of flowing water.