Just before the border with Bangladesh the Farakka Barrage controls the flow of the Ganges , diverting some of the water into a feeder canal linked to the Hooghly for the purpose of keeping it relatively silt-free .
Near the border with Bangladesh the Farakka Barrage controls the flow of the Ganges by diverting some of the water into a feeder canal which has link with the Hooghly river to keep it relatively silt-free .