Introduce ocean water and build three new reservoirs. The reason is: the ocean diversion project includes Shihu Reservoir, water diversion projects outside the region and water diversion projects within the region. After the project is completed, it will solve the water shortage problem in Dalian in 2040, optimize the layout of water supply projects in the region, enhance the water supply capacity of the project, and effectively improve the security of water supply. . The project plans to construct the Shihu Reservoir, Heiyuting Gate, Heiyuting Gate to Biliu River Reservoir water supply project, and Dalian city water supply project. Through the reservoir-sluice joint adjustment method, the Dayang River water is lifted from the Heiyuting Gate to the Biliuhe Reservoir. After being adjusted by the Biliuhe Reservoir, it is supplied to the Wazidian Reservoir, the Dongfeng Reservoir high-level pool, and the Liuda Reservoir, and then connected to the existing existing facilities in Dalian City. Water supply network. The annual water supply volume of the project is 445 million cubic meters, and the total length of water transmission lines is 287 kilometers, including 99 kilometers of tunnels and 188 kilometers of pipelines.