December 12 marks the seventh anniversary of the full water supply of the South-to-North Water Transfer Project. The reporter learned from China South to North Water Transfer Group Co., Ltd. that in the past seven years, the south to North Water Transfer Project has transferred nearly 50 billion cubic meters of water to the north, benefiting 140 million people. The economic development pattern of more than 40 large and medium-sized cities has been optimized due to water transfer. The first phase of the East and middle route of the South-to-North Water Transfer Project was fully opened on December 12, 2014. The first phase of the east line project starts from the Jiangdu water control project in Yangzhou City and uses the world's largest pumping station group to "lift" the Yangtze River water northward into Shandong; The first phase of the middle line project diverts water from the Taocha canal head gate of Danjiangkou reservoir into the canal, and the south water flows thousands of miles "escorted" by the world's largest aqueduct group, moistening Henan, Hebei, Tianjin and Beijing. Up to now, the first phase of the East and middle route of the South-to-North Water Transfer Project has transferred about 49.4 billion cubic meters of water. Among them, the east line transfers 5.288 billion cubic meters of water to Shandong, and the middle line transfers more than 44.1 billion cubic meters of water to Henan, Hebei, Tianjin and Beijing. In terms of ecological water replenishment, the water storage of lakes in the water receiving areas along the east line of the South-to-North Water Transfer Project is stable and the ecological environment continues to improve; The middle line makes up more than 7 billion cubic meters of ecological water for more than 50 rivers in the north, which has significantly improved the ecological environment, and stopped the decline and recovery of shallow groundwater level in North China. The relevant person in charge of the Ministry of Water Resources said that in the past seven years, the South-to-North Water Transfer Project has changed the water supply pattern in the north, promoted the recovery of the river and lake ecological environment in the water receiving area, and played a huge economic, social and ecological benefit. In terms of water quality, at present, the water quality of the water transmission trunk line of the east line meets the standard, and continues to be stable above class III of surface water quality; The water supply quality of Danjiangkou reservoir and the middle route trunk line is stable above class II of surface water quality. Wang Hao, academician of the Chinese Academy of engineering and hydrology and water resources scientist, said that the achievements of the South-to-North Water Transfer Project since its full water supply mainly lie in the transformation of water use and economic development mode by water saving, the continuous improvement of regional water ecological environment by environmental protection and pollution control, the accurate water transfer to ensure the water supply safety of water receiving areas, and the overall allocation of south water to give full play to the ecological benefits of the project. The East and middle route of South-to-North Water Transfer Project is an important part of the national backbone water network of "four horizontal and three vertical". According to the overall plan of the South-to-North Water Transfer Project, relying on the abundant water sources of the Yangtze River, the East, middle and West lines of the South-to-North Water Transfer Project form the backbone of the national water network with "four horizontal and three vertical" as the main body through the connection with the Yangtze River, Huaihe River, Yellow River and Haihe River. The outline of the 14th five year plan clearly proposes to promote the follow-up project construction of the east middle line of the South-to-North Water Transfer and deepen the comparison, selection and demonstration of the west line of the South-to-North Water Transfer Project. At present, the South-to-North Water Transfer Project is promoting the planning and construction of follow-up projects of the East and middle lines, and carrying out preliminary work such as comparison, selection and demonstration of planning schemes of the west line project. (outlook new era)