In order to improve the operation efficiency of the pump station and prevent the pump cavitation

vibration and noise from exceeding the standard

a physical model was established with a 1∶10 geometric scale to study the flow pattern of the connecting open channel

inlet forebay and inlet channel of the rainwater pump station. The test results show that there is no adverse flow pattern in the channel during high water level operation

but there will be adverse flow pattern in the channel during normal water level and low water level operation. In view of the adverse flow pattern in the channel during the operation of normal water level and low water level

the adverse flow pattern in the channel is eliminated by taking rectification measures for the connecting open channel and inlet forebay

and the head loss of the channel is also within the allowable range of the design.