On the morning of September 9, the last unit of Datenxia Water Conservancy Hub, an important backbone project of the national water network, passed the acceptance and was officially put into operation, marking the completion of the main project four months ahead of the construction period approved by the state.
Datengxia Water Conservancy Hub is a landmark project of 172 major water conservancy projects identified by the State Council for water conservation and water supply, and is a key control project in the Pearl River Basin that integrates flood control, shipping, power generation, water resources allocation, irrigation and other functions. In terms of flood control, joint dispatch with the reservoir group in the river basin can raise the flood control standard of Wuzhou City from once in 50 years to once in 100 years, ensure that Guangzhou effectively defends against floods in 1915, and raise the flood prevention standard of key flood protection objects in the Pearl River Delta from once in 50 years to once in 100 to 200 years; In terms of shipping, the navigation of the Qianjiang River will be increased from 300 tons to 3000,160 tons, opening up the key nodes of the golden waterway of the Pearl River; In terms of power generation, the total installed capacity is 60.55 million kilowatts, and the designed annual power generation capacity is 10.3 billion kWh, becoming the main power station of Guangxi Power Grid; in terms of water resources allocation, the response time for emergency water replenishment in the river basin has been shortened from 120 days to 138 days, effectively ensuring the security of water supply in the Guangdong-Hong Kong-Macao Greater Bay Area; in terms of irrigation, it can solve the problem of drought and water shortage of <>.<> million mu of arable land and <>.<> million people in Guizhong, and help local rural revitalization.
It is understood that the total investment of the project is 357.36 billion yuan, with a total storage capacity of 34.79 billion cubic meters and a flood control reservoir capacity of 15.47 billion cubic meters. During the construction period, a number of technical indicators set international or domestic records, with the highest domestic head of the single-stage lock, The herringbone door at the bottom of the lock is 5.8 meters high, which can be called the first gate in the world, and the mushroom head at the bottom of the herringbone door is forged with high-carbon and high-chromium stainless steel, which is the first at home and abroad; equipped with 20 sets of the largest axial flow paddle turbine generator sets in China, with a single capacity of 26,6820 kilowatts, ranking first in the same type of unit; <> arc-shaped working gates that rank in the forefront of domestic lock and dam projects, with a maximum thrust load of <>,<> tons; "one center, double fish road, double breeding station, five artificial habitats" have been built; The largest water ecological protection engineering system of domestic water conservancy projects to meet the dam crossing needs of rare fish breeding and migration in the Hongshui River.
The completion of the main project of Dateng Gorge Water Conservancy Hub will further improve the flood control system of the Pearl River Basin, strengthen the important node of the national water network, and comprehensively complete the "clean energy corridor" of the Hongshui River, providing new impetus for strengthening the governance and management of the Pearl River Basin, improving the ability of 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.
(Main station reporters: Chen Yewei, Fu Qien, Cen Tong, Meng Yuren)