What are the characteristics of the South-to-North Water Transfer Project compared with other water transfer projects?

Different characteristics; First, the scale is different. The first is cross-basin. Looking at water transfer projects at home and abroad, there are few real inter-basin water transfers. The South-to-North Water Transfer Project across the Yangtze River, Huaihe River, Yellow River and Haihe River not only solves the problem of water resources replenishment, but also optimizes the allocation of water resources in a wider scope. Three water transfer lines in the east, middle and west are connected with the Yangtze River, Huaihe River, Yellow River and Haihe River, forming a "four horizontal and three vertical" water network overall layout, providing water resources guarantee for sustainable economic and social development. Second, the length is different. The eastern and central lines add up to nearly 3000 kilometers. Long-distance water transfer project is greatly affected by climate change, which requires high construction and operation. Third, the amount of water is different. The third line of South-to-North Water Transfer Project transfers 44.8 billion cubic meters of water, which is equivalent to the water volume of a Yellow River. The East and Middle Route projects are located in relatively developed areas in China, with more than1.8000 bridges across the canal and thousands of roads, railways and oil and gas pipelines crossing together, which is also a technical challenge.

Second, the engineering objectives are different. In the past, most water transfer projects at home and abroad were single-purpose, some for agricultural irrigation and some for domestic water. The construction of South-to-North Water Transfer Project is multi-objective, which is not only a water resources allocation project, but also a comprehensive ecological project that benefits the people. After the implementation of the project, the carrying capacity of water resources and water environment in the receiving area will be greatly improved, water will be supplied to more than 0/00 cities along the line, and part of agricultural water and ecological water occupied by cities will be repaid to agriculture and ecology. In a sense, industry feeds back agriculture and cities feed back rural areas, which is a vivid embodiment of Scientific Outlook on Development's water resources security.

Third, the engineering field is different. In the past, water diversion projects were mainly in the field of engineering, such as canal repair, dam construction and engineering. The South-to-North Water Transfer Project not only involves the engineering field, but also involves land acquisition and resettlement, water pollution control, ecological environment and cultural relics protection at the social level. In order to meet the water quality requirements of water diversion, 426 pollution control projects were arranged on the East Line, with an investment of 654.38+0.4 billion yuan, which increased the intensity of water pollution control and achieved initial results, providing reference for pollution control in other key river basins in China.

Fourth, technical management is different. The South-to-North Water Transfer Project consists of more than 150 design units and more than 2,700 units. There are many types of buildings, high technical requirements and many technical problems. For example, the heightening of Danjiangkou dam requires both heightening and thickening, and there is no similar engineering practice at home and abroad on how to ensure the connection and joint stress of new and old concrete. In the middle line crossing the Yellow River project, how to dig thousands of meters of tunnels from the complex stratum under the Yellow River to bear the internal and external water pressure, overcome the stubborn stones and dead trees that have never been encountered in the previous shield construction, and ensure that the tunnels are watertight; Pccp pipeline in Beijing, with a diameter of 4 meters, has won two international patents for pipeline production from production, transportation to installation, and has overcome many technical problems. In addition, the technical management of the South-to-North Water Transfer Project is also facing many challenges. From the optimization of preliminary design scheme to the formulation of construction management norms, there is a game between technology and society in technical scheme. We should not only consider the technical necessity, but also the feasibility of implementation, listen to the opinions of all parties and take into account the interests of all parties. In the project implementation stage, many engineering practices have no corresponding technical specifications and standards, which need to be studied, formulated and applied to construction.

I hope it helps you.