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Water quality experienced changes throughout the 3-year ecological engineering experiment in the drinking water source in Meiliang Bay of Lake Taihu. Average concentrations of TN, TP, NH 4+ , BOD 5 and transparency in the drinking water source during the period of July–December 2005 were 1.85, 0.13, 0.23, 3.03mgL −1 and 27.5cm, respectively, decreasing by 47.9%, 21.2%,...