Hydrodynamics in shallow lake has been paid more and more attention to since it has profound effect on sediment resuspension and nutrients transportation in recent years.An investigation to current circulation pattern was made in Meiliang Bay, Lake Taihu on 19 January 2003 and a conclusion has been drawn that the water at the mouth of Meiling Bay moves to Lake Taihu stably with a peak speed 8cm/s, and the water located along the west shore moves toward the north and it is in opposite style on the east side.The current along the east shore branches off to the west to compensate for mass loss and to the south to flow into Lake Taihu.An convergence center was found in the northeast area of Meiling Bay with high nutrients concentration.The water ascends in most areas and flows into Lake Taihu totally with supply from the rivers located along shore and Lake Wuli.