The influences of inlet concentration,inlet discharge,and bottom outlet aperture on the percentage of clear water in large scale turbid water hydraulic power separation device were investigated based on the experimental study.The results showed that the overflow turbidity influenced by different inlet discharge and bottom outlet aperture is not obviously different when overflow discharge is small. The overflow turbidity will increase with the increase of overflow discharge, and the overflow discharge almost varies directly with inlet discharge. The percentage of clearwater decreases with increase of bottom outlet aperture and inlet concentration, but increases with increase of of device increased under the same inlet concentration. The formula among inlet concentration, diameter and overflow discharge under the same overflow turbidity was proposed.
