 One problem was the impact of the project on the Han River, below the Danjiangkou Dam, from which approximately one-third of the water is diverted.One long-term solution being considered is to build another canal to divert water from the Three Gorges Dam to Danjiangkou Reservoir.On Friday, Dec. 12, 2014, the middle leg of China’s South to North Water Project, the world’s largest water transfer project to date, opened.