Experimental results showed that a e rators increase the energy dissipation of the flow in the channel by reducing the velocity coefficientφin the deflector bucket and the jet-trajectory length, by increasing the nergy dissipation of the jet flow in the air and the diffusion length of the jet falling into the pooland by reducing the energy intensity of the jet falling into the pool. The energy dissipation prevents wash out downstream. When air is not entraine din the water flow, the aeratorsact as artificial irregularities in the channel. The energy dissipation due to the aerators in the channel without entrained air is greater than when air is entrained in the water flow. Correlations of the experimental data can be used to estimate the energy dissipation effect of the aerators on the outlets tructure for the three testcases.