Water comes from the Xijiang River to nourish more than 32 million people in the Greater Bay Area
The 113.2-kilometer-long underground water tunnel runs through the core urban agglomeration of the Guangdong-Hong Kong-Macao Greater Bay Area.
Water comes from the Xijiang River to moisturize the Greater Bay Area.
The water transmission line of the Pearl River Delta Water Resources Allocation Project has a total length of 113.2 kilometers, a total investment of approximately 35.4 billion yuan, and an annual water supply of 1.708 billion cubic meters. It consists of one main line, two branch lines, one branch line, three pumping stations and four storage reservoirs. It is composed of a deep underground water conveyance tunnel that passes through the core urban agglomeration of the Guangdong-Hong Kong-Macao Greater Bay Area.
Ensure water supply safety and ecological security in the Greater Bay Area
In recent years, with the rapid economic and social development, the demand for water resources in the Guangdong-Hong Kong-Macao Greater Bay Area has become increasingly strong. The eastern part of the Pearl River Delta supports 68% of the permanent population and 74% of the total economic output with 43% of its water resources. The water resources development and utilization rate in the Dongjiang River Basin is approaching the warning line of 40%, while the water resource development and utilization rate in the Xijiang River Basin is only 1.3%. Planning to divert water from the Xijiang River to relieve the difficulties of the East River is the best way to solve the water shortage problem in the eastern urban agglomeration of the Guangdong-Hong Kong-Macao Greater Bay Area.
The project started in full swing in May 2019. The Provincial Department of Water Resources and other relevant departments, governments at all levels along the line, Guangdong Group and all participating units, with the mission of shouldering heavy responsibilities and overcoming difficulties, the dedication of hard work and willingness to pay, lasted 4 years and 8 months of hard work With construction and dedication, the water connection was completed half a year ahead of schedule.
Zhu Chaorong, director of the Construction Department of the Provincial Department of Water Resources, said that the water supply project will change the single water supply pattern of Nansha District of Guangzhou City, Shenzhen City, and Dongguan City, achieve a spatial balance of water flowing from the west to the east, greatly improve the water supply guarantee rate, and provide Hong Kong, Guangzhou Panyu , Shunde, Foshan and other places to provide emergency backup water sources, benefiting more than 32 million people, supporting the water demand of approximately 1.7 trillion yuan in GDP, and gradually returning ecological water to the Dongjiang Basin, further ensuring water supply security and ecological security in the Guangdong-Hong Kong-Macao Greater Bay Area.
"Bay Area Hidden Dragon" overcomes many world-class problems
The Pearl River Delta region has dense river networks, dense buildings, criss-crossed road networks, numerous underground faults, and changeable geology, which poses extremely high challenges and requirements for engineering construction. In order to achieve "less land acquisition, less demolition, and less disturbance to the people", after 7 years of scientific research and demonstration, it was finally decided to use the underground deep shield tunnel construction method. Yan Zhenrui, chief engineer of the Guangdong Provincial Water Conservancy and Electric Power Survey and Design Institute, said that the project will lay the water pipeline 40-60 meters underground, crossing a total of 4 high-speed railways, 8 subways, 12 highways, 16 rivers and lakes, and construction along the way. There are 37 ultra-deep vertical working wells, and the permanent land acquisition is only 2,600 acres. Compared with the traditional open channel water delivery method, nearly 20,000 acres of land are saved, and shallow layers are reserved for the future development of municipal construction such as subways, communications, electricity, and pipe corridors. underground space.
"Faced with the huge difficulties and challenges brought about by this, the builders have innovatively carried out scientific research and prototype testing, and worked together to overcome long-distance deep burial shield construction, high-water pressure lining design and construction, wide-lift variable-speed water pump research and development, long-distance deep burial Pipeline maintenance and many other world-class problems. We have built the world's shield tunnel with the highest water transmission pressure, the longest prestressed lining water transmission tunnel, and the long-distance pressured water diversion project with the largest flow rate." Guangdong Yuehai Pearl River Delta Water Supply Co., Ltd. Introduction by the person in charge.