Abstract： Based on the analysis on the disadvantage of the formulas representing cross-section velocity distribution uniformity of inlet conduit of water pumping station,two formulas,namely,the cross-section of effective flow area ratio and the flow uniformity were established by taking river flow characteristics into consideration.Hydraulic optimizations for stilling basin and wing wall of an unilaterally-arranged-pump-gateway were conducted with 3D steady numerical simulation by regarding the formulas as objective function.The results of numerical simulation were verified through the model experiment.According to the engineering condition,it is concluded that the excessive length of the stilling basin has a negative impact on the effect of energy dissipation.Setting auxiliary devices for stilling basin and reducing the length of the wing wall are good choice.Riprap protection at the end of the apron extension can solve the problem that water velocity exceeds the resisting flow velocity of riverbed.
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