Great power's heavy equipment is on the rise again! The main project of the Datongxia Water Conservancy Hub has been completed
On the morning of September 2nd, the last unit of the Datongxia Water Conservancy Hub, an important backbone project of the national water network, passed the acceptance inspection and was officially put into operation, marking the completion of the main project four months ahead of the national approved construction period.
The Datongxia Hydro junction is a landmark project of 172 major water conservancy projects for water conservation and water supply determined by the State Council, and a key control project in the the Pearl River basin integrating flood control, navigation, power generation, water resource allocation, irrigation and other functions. The comprehensive benefits of the project are remarkable. In terms of flood control, the joint operation with the reservoir group in the basin can raise the flood control standard of Wuzhou City from 50 year return period to 100 year return period, ensure the effective prevention of 1915 year flood in Guangzhou, and raise the flood control standard of key flood protection objects in the the Pearl River Delta from 50 year return period to 100 to 200 year return period; In terms of shipping, the navigation of Qianjiang River will be increased from 300 tons to 3000 tons, and the key nodes of the Pearl River golden waterway will be opened; In terms of power generation, the total installed capacity is 1.6 million kilowatts, with a designed annual power generation of 6.055 billion kilowatt hours, making it the main power station of the Guangxi power grid; In terms of water resource allocation, the response time for emergency water replenishment in the basin has been shortened from 10 days to 3 days, effectively ensuring the water supply safety in the Guangdong Hong Kong Macao Greater Bay Area; In terms of irrigation, it can solve the problem of 1.2 million mu of arable land and 1.38 million people suffering from drought and water shortage in central Guangxi, and help promote local rural revitalization.
It is understood that the total investment of the project is 35.736 billion yuan, with a total storage capacity of 3.479 billion cubic meters and a flood control storage capacity of 1.5 billion cubic meters. During the construction period, multiple technical indicators set international or domestic records, and it has the highest water head single stage ship lock in China. The miter gate at the lower lock of the ship lock is 47.5 meters high, making it the world's first gate. The mushroom head at the bottom of the miter gate is forged using high carbon and high chromium stainless steel, which is the first in China and internationally; Equipped with 8 of the largest axial flow propeller type hydroelectric generator units in China, with a single unit capacity of 200000 kilowatts, ranking first among similar units; Arrange 26 radial working gates that are among the top in domestic dam type engineering, with a maximum thrust load of 6820 tons; We have established the largest water ecological protection engineering system in China, which includes "one center, two fish paths, two breeding stations, and five artificial habitats", to meet the breeding and migration needs of rare fish species in the Hongshui River.
The completion of the main works of the Datongxia Hydro junction will further improve the flood control system of the the Pearl River basin, lay an important node in the national water network, and comprehensively build the "clean energy corridor" of the Hongshui River, providing a new impetus for strengthening the governance and management of the the Pearl River basin, improving the ability to guarantee water security, promoting the high-quality development of local economy and society, and helping the construction of the Guangdong Hong Kong Macao Greater Bay Area.
