Abstract: Swirling flow and sedimentation are two major problems that lower the efficiency of pumping stations. A pumping station water intake in the Lahore area of Pakistan was experimentally tested and numerically simulated to investigate its hydrodynamic characteristics in this study. The simulation results show that installation of a M-type anti-vortex device (AVD) in the water intake reduces the maximum swirl angle up to 4.82° or a 72.69% reduction in this angle. Analysis on the uniformity of flow velocity in the intake reveals the mechanism of swirl suppression by this anti-vortex device. Thus, this study verified that the device is effective and useful to the design and operation of water intake pumping stations.