The South-North Water Diversion Project "will link the Yangzi with the Yellow River, taking water from the humid south to the parched north. When finished, 3,000km of tunnels and canals will have been drilled through mountains, across plains and under rivers. Its hydrologic and environmental consequences could be enormously harmful. The project links China's two great rivers through three new channels. The eastern, or downstream one is due to open by the end of this year...It would pump 14.8 billion cubic metres along 1,160km of canals, using in part a 1,500-year-old waterway, the Grand Canal. The water pumped so far has been so polluted that a third of the cost has gone on water treatment."