The cumulative water diversion exceeded 40 billion cubic meters! Let’s see how big countries and heavy weapons can optimize the water supply pattern

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As of July 19, 2021 (8:00), the first phase of the South-to-North Water Diversion Middle Route Project has diverted a total of 40 billion cubic meters of water from the Taocha Canal head into the canal, supplying 13.5 billion cubic meters to Henan Province, 11.6 billion cubic meters to Hebei Province, 6.5 billion cubic meters to Tianjin, and 6.8 billion cubic meters to Beijing. Among them, 5.9 billion cubic meters of water will be supplied to the ecology of Tianjin, Hebei and Henan. The middle line project has become the main water source for large and medium-sized cities along the Beijing-Tianjin-Hebei-Henan belt, and the number of people directly benefiting from it has increased to 79 million, more than double the number of 38 million beneficiaries in 2015, the first anniversary of the water supply. △The Taocha Head and Middle Line Project of the South-to-North Water Diversion Project has been operating safely and stably for more than 2,400 days, and the water quality meets or exceeds Class II surface water standards. The project has optimized the water resources allocation pattern, ensured water safety for the people, revived the ecological environment of rivers and lakes along the route, and significantly enhanced the sense of gain, happiness, and security of the people in the water-receiving areas. From "auxiliary" to "main" to optimize the water supply pattern. In the past seven years since the central line project opened water, the project's water supply has changed from "auxiliary" to "main". It has been transformed from a supplementary water source for domestic water in large and medium-sized cities along the water receiving area during planning to a main water source, changing the water supply pattern in the Beijing-Tianjin-Hebei-Henan water-receiving area. The domestic water supply guarantee rate of water-receiving cities in the middle line has increased from a minimum of less than 75% to more than 95%. The speed at which the water supply target of the project is achieved has changed from "slow" to "fast". The water diversion volume of the middle line project has increased year by year. The water supply will be effective in 6 years. The actual water supply in 2020 was 8.622 billion cubic meters, exceeding the average water supply scale planned for the middle line project for many years. With the increasing amount of water diversion, the water demand in the water receiving areas has changed from "weak" to "strong". The provinces and cities along the route have made efficient use of the water sources of the South-to-North Water Diversion on the premise of giving priority to water conservation. Beijing has increased the water consumption of the south water for three years and Tianjin has increased the water consumption of the south water for five consecutive years. The annual water consumption of the south water in Henan and Hebei provinces has shown an increasing trend year by year. The middle line project has benefited more than 20 large and medium-sized cities and 131 counties along the route, and the number of beneficiaries has increased year by year. At present, the number of people directly benefiting from the Beijing-Tianjin-Hebei-Henan region has increased to 79 million, which is more than double the 38 million people who benefited from the water supply in the early days. Thirteen million people in Beijing drink sweet Nanshui, which accounts for more than 70% of the water supply in the main urban area. At the same time, some areas such as Daxing, Mentougou, Changping, and Tongzhou also use Nanshui. Nanshui has become the main water source to meet the water needs of the capital city. In order to fully utilize the benefits of the project, Beijing has completed a total of approximately 130 kilometers of supporting water transmission pipelines in the city, including 22 kilometers of reverse water transmission pipelines from the Tuancheng Lake regulating tank to Miyun Reservoir, realizing the connection between the water in the middle route of the South-to-North Water Diversion Project and the Miyun Reservoir. In Tianjin, 12 million people have benefited. Nanshui has become the main source of domestic water in Tianjin. All residents in 14 main urban areas use Nanshui. In order to improve the quality of drinking water for rural residents, Tianjin built centralized water supply plants, extended the tap water pipe network, and gradually replaced underground water sources with South-to-North Water Diversion, covering 2,817 villages and 2.868 million rural residents, basically realizing the integration of urban and rural water supply. All 24 million people in 11 provincial cities in Henan, including Zhengzhou, Nanyang, Pingdingshan, Luohe, Zhoukou, Xuchang, Jiaozuo, Xinxiang, Hebi, Anyang and Puyang, and 40 county-level cities including Dengzhou and Huaxian, use Nanshui. Thirty million people in Hebei have benefited. The water supply scope of the middle line project has covered 7 provincial cities including Shijiazhuang, Handan, and Xingtai, and more than 90 county-level cities including Dingzhou and Xinji. The central main canal and supporting projects in Hebei have built a safe water supply network system, delivering high-quality south water to water-receiving cities and counties through more than 40 water distribution outlets and 128 surface water plants. △The middle line project of the Xingtai urban section can provide ecological water replenishment and improve the environment of rivers and lakes. The middle line project of the South-to-North Water Diversion Project plays an important ecological function while optimizing the water supply pattern. Through ecological water replenishment, the ecological restoration of rivers and lakes along the line is promoted, and the water environment is continuously improved. This provides important support for the health of the river and lake systems in the Huaihe, Haihe, and Yellow River basins, the virtuous cycle of the water ecosystem, and the comprehensive management of groundwater overexploitation in areas along the line, especially in North China. So far, the middle-line project has replenished a total of 5.9 billion cubic meters of ecological water to 48 rivers in the north, of which 3.789 billion cubic meters have been replenished in the river sections under comprehensive control of groundwater overexploitation in North China. The water quality of rivers and lakes has been improved, aquatic ecosystems have been restored, and regional water environment quality and livability have been significantly improved. Today, many rivers in Henan and Hebei, including the Baihe River, Fuyang River, Qili River, Puhe River, and Daqing River, have clear waters and beautiful banks. Baiyangdian has a water storage capacity of 367 million cubic meters and a water surface area of ​​267 square kilometers. The water quality continues to improve. The water quality in the center of the lake is stable at Category 4, reaching the best level in the past 10 years. The water level of Haihe River in Tianjin has increased, and the water quality of the river has improved significantly. Beijing's Yongding River and Chaobai River have abundant water, recreating the natural landscape of clear water and the chirping of birds and frogs. △After ecological water replenishment, from June 7 to July 9 in Baiyangdian, the middle line project implemented summer ecological water replenishment for many rivers in Hebei Province, including the Hutuo River and Daqing River. The total water replenishment volume of the middle line main canal reached 114 million cubic meters. This water replenishment will help the ecological environment of Hutuo River, Buhe River and Nanjuma River continue to improve, and the Ziya River, Ziya Xin River and other rivers that have stopped flowing will regain their vitality. After replenishing water, the Hutuo River is gurgling and sparkling. Compared with before water replenishment in 2018, the groundwater level within 10 kilometers on both sides of the Hutuo River has risen by 0.54 meters. The good water environment has brought about ecological changes. The vast water surface of the Hutuo River effectively regulates the temperature and humidity on both sides of the river. The temperature is adjusted to about 4°C and the humidity is adjusted to more than 20%. The ecological replenishment effect is obvious. Shijiazhuang City has launched a series of projects such as the Hutuo River Comprehensive Regulation Project and the Hutuo River Ecological Restoration Project. After regulation and restoration, Shijiazhuang City has formed 2,680.54 hectares of water surface and 10,398.82 hectares of green space. △The middle line project replenishes ecological water to the Hutuo River. Due to the continuous replenishment of south water, Beijing has gradually closed its own wells in recent years and greatly reduced the extraction of groundwater. It also uses south water to replenish water to key water sources and urban rivers and lakes, and groundwater levels have risen significantly. Data from the water affairs department show that since 2016, Beijing’s groundwater levels have begun to “stop falling and rebound.” Currently, the groundwater depth in plain areas has risen by a total of 3.72 meters. Dry springs have re-emerged. Mountain springs in Yanqing, Changping and other areas on the outskirts of Beijing that had dried up for many years have begun to re-emerge after water supply. The southern water used by residents is treated in the reclaimed water plant and then injected into the river. Liangshui River, Qinghe, Beiyun and other urban rivers that were once called smelly rivers have finally been removed. Residential buildings along the river have been upgraded to "river view rooms". The abundant south water continuously injects new vitality into Beijing, allowing Beijing to build a new ecological city pattern in which blue and green are intertwined and water and city are integrated. Accurate water transfer ensures "three safety" and is implemented in depth * * * * In the spirit of the important speech at the symposium on promoting the high-quality development of the follow-up project of the South-to-North Water Diversion Project, we stand at the political level of protecting the lifeline, promote scientific management, improve project operation and management capabilities and levels, and ensure project safety, water supply safety, and water quality safety. Implement "double precision maintenance" and focus on project safety. On the one hand, "precision pricing" is implemented. For civil engineering and daily landscaping maintenance projects, a standardized bill of quantities will be listed to make project pricing more transparent and scientific. On the other hand, "fine maintenance" is implemented, from preparing maintenance project plans to selecting maintenance units ； From the quality progress of the assessment process to safe and civilized construction, we strive for refinement and detail in every link to create a lifeline quality project. In order to ensure the safety of water supply, the middle line project uses high-tech means to build an automated dispatch gate control system to realize automatic collection of dispatch information such as water level, flow rate, gate opening, and remote automatic control of various gates. Combining the water conditions and work conditions across the entire line, dispatching instructions are scientifically formulated and issued, and dispatching agencies at all levels carry out water delivery dispatching accurately. “Unified dispatch, centralized control, and hierarchical management" realize the automation of the water diversion process, the visualization of remote monitoring, and the informatization of operation and maintenance management. △In order to ensure the sustainable northward transmission of clean water from the first canal of the South-to-North Water Diversion Project, the middle route project established a water quality monitoring system consisting of "1 center, 4 laboratories, 13 automatic monitoring stations, and 30 fixed monitoring sections", and used advanced testing equipment to conduct regular "physical examinations" of water bodies. Through intelligent equipment such as video surveillance and electronic fences, we can cooperate with engineering inspections, daily water quality inspections, and police officers to promptly discover and deal with abnormal water quality conditions. Li Yan, a water quality inspector at the Beijing Branch of the Central Line Construction Management Bureau, said: “The Huinanzhuang Water Quality Automatic Monitoring Station carries out monitoring 4 times a day and monitors 12 index parameters. At present, the water quality of the middle line project is stable or better than surface water Class II. ” Implementing the construction of "smart center line", relying on information technology, developing automated dispatching and decision support systems, real-time supervision systems for project inspection and maintenance, etc., using advanced technologies such as IT technology, mobile technology, and GIS technology, and using automated visualization technology to promote full-scenario video intelligent analysis of 44 management offices of the center line project to protect the safe operation of the project. source: Source of content from the South-to-North Water Diversion Project Management Department of the Ministry of Water Resources: China Water Conservancy