The Beijing section of the South-to-North Water Diversion Route has been overhauled and Beijing residents are drinking heavy water from the Yangtze River today

The Beijing section of the South-to-North Water Diversion Route has been overhauled, and Beijing residents are drinking heavy water from the Yangtze River today

　　Beijing News (Reporter Ma Jinqian) On the morning of June 1, 7 months after the water stop and maintenance, the Beijing section of the middle line of the South-to-North Water Transfer Project resumed water delivery one month earlier than originally planned. The drinking water of Beijing residents will be gradually switched from the Miyun Reservoir water source Water source for the middle line of South-to-North Water Transfer Project. After overhaul, the daily water flow into Beijing will increase from 3.4 million cubic meters to more than 4 million cubic meters.

There are trees on both sides of the open channel of the Beijing section of the South-to-North Water Diversion Route. Beijing News reporter Zheng Xinqia

Complete the maintenance one month in advance to relieve the pressure of 100 million cubic meters of water

　　"The Beijing section of the main line has been in safe operation for more than ten years. To ensure the continued safety of the project, a comprehensive physical examination is required." In September, the water was officially put into operation and assumed the task of emergency water supply in Beijing. After the completion of the mid-line project of the South-to-North Water Diversion Project in December 2014, it took on the task of bringing river water into Beijing and transferred more than 5.2 billion cubic meters of water.

　　The main section of the Beijing section of the main line was originally planned to be shut down for maintenance from November 1, 2019 to June 30, 2020, and finally completed the maintenance task on May 30 this year one month in advance. "One month in advance, more than 100 million cubic meters of water was added to Beijing, which correspondingly reduced the water pressure on Miyun Reservoir." Zhang Dacheng said.

　　According to reports, the overhaul mainly inspects the main structure of the project, water machine equipment, metal structure, electrical and automation equipment, and ancillary facilities. In addition, sludge cleaning has also been carried out.

　　"In order to ensure the completion of maintenance tasks during the epidemic, we used point-to-point special vehicle transportation and other methods to arrange personnel to enter the site according to the construction plan. Many management and construction personnel have stayed on site and have not returned home so far." Zhang Dacheng said.

At the outlet of the open channel of the Beijing section of the South-to-North Water Diversion Route, clear water continuously flows out. Beijing News reporter Zheng Xinqia

After overhaul, supply water to Beijing at a flow rate of 50 cubic meters per second

　　The Beijing section of the South-to-North Water Diversion Route will be built on a scale of 1.05 billion cubic meters of water transfer per year, starting from Fangshan District, North Juma River, passing through Fangshan District, passing through Yongding River, crossing Fengtai District, and going north along West Fourth Ring Road to Haidian District The Summer Palace Tuancheng Lake, with a total length of 80 kilometers, includes 56.4 kilometers of double-row PCCP (prestressed steel tube concrete pipe), 22.7 kilometers of double-hole hidden culvert and 880 meters of open channel.

　　Zhang Dacheng introduced that after the main body of the project completed the overhaul, the safety of the increased flow of water in the PCCP section was improved. According to the overall experience of the Beijing section, the project was promoted to reach the design flow and the increased flow (60 cubic meters per second) joint scheduling . After overhaul, the project will achieve a continuous flow of 50 cubic meters per second to Beijing, improving the water supply guarantee capacity.

Schematic diagram of the Beijing section of the South-to-North Water Diversion Route. Beijing News reporter Zheng Xinqia

　　It is reported that the water quality of the South-to-North Water Transfer Project has always been stable above the surface water environmental quality standard Class II. Nearly 70% of the southward water flows to thousands of households in Beijing, directly benefiting more than 12 million people. According to Zhang Dacheng, after the water supply is restored, on the one hand, it will deal with the upcoming peak of urban water use, and on the other hand, it will be used to supplement the Miyun Reservoir and groundwater.

　　Beijing News reporter Ma Jinqian collaborates with reporter Zheng Xinqia