Beijing to protect the best * eliminate the bad * strong ecological, water ecological quality to achieve a steady improvement     This reporter recently learned from the Beijing Municipal Bureau of Ecology and Environment, the first half of this year, the city's 37 national examination sections, 1-3 water quality sections have 26, accounting for 70.3%, an increase of 16.2 percentage points, no inferior sections, dynamic to meet the national annual assessment requirements.    In recent years, Beijing to "preserve" "eliminate bad" "strong ecological" as the focus, promote water resources protection, promote water environment management, explore water ecological restoration, multi-pronged approach to do a good job of blue water， The quality of water ecology and environment has been steadily improving. Highlighting the "preservation of excellence Ⅲ" to promote the protection of water resources     On August 30, 2020, General Secretary Xi Jinping wrote back to the villagers who built and guarded Miyun Reservoir, emphasizing that they should continue to guard Miyun Reservoir well and make new contributions to building a beautiful Beijing.To implement the spirit of General Secretary Xi Jinping's reply letter, Beijing will protect the "a pot of good water" in the upper river, do its best to guard the Miyun Reservoir, which is a "priceless treasure", and continue to build a solid water security barrier in the capital.    According to the introduction, Beijing has further promoted the construction of a refined monitoring network and system platform for the water ecology and environment of the basin on the basis of the full closed management and monitoring coverage of Miyun Reservoir, and continued to improve the supervision capacity. Innovation to carry out horizontal ecological protection compensation in the upper Chao Bai River basin of Miyun Reservoir, a total of 950 million yuan of compensation funds to support the Zhang Cheng area over the past three years, and strongly promote the continuous reduction of pollutant concentrations at  cross-sections. The water quality of Miyun Reservoir  reaches Class II, and it has been selected as the first batch of "beautiful rivers and lakes" excellent cases in China.    In addition to protecting the upper river, Beijing also sends downstream "a river of clear water". In recent years, Beijing and Hebei have established a cross-border collaboration mechanism in the Baiyangdian basin to promote the joint treatment of water pollution in the Daqing River basin.    "In 2021, a number of ecological treatment and restoration projects were implemented in Fengtai and Fangshan District, focusing on the use of recycled water, water system circulation and ecological construction, to further enhance the water quality regulation capacity of the Daqing River Basin, and improve the water quality of the exit section to Class III, and the water that flows into the Baiyangdian is clearer." The person in charge of the Beijing Ecological Environment Bureau told reporters.    In 2021, Beijing will realize the full navigation of the Beijing section of the Grand Canal, and in June 2022, the 62-kilometer interconnection of the Beijing-Hebei section of the Grand Canal will be realized. In recent years, Beijing presents a "river with water" scene, the full practice of "water to open the road, water to lead the way", the Yongding River, Chaobai River and other five major rivers all back to the "flow of the river" and The five major rivers, such as Yongding River and Chaobai River, have all been reborn as "flowing rivers" and have been connected to the sea, writing the vivid music of "flowing culture". Highlight the "elimination of bad", promote the water environment management    Beijing main goal is to improve the quality of the water ecosystem and the public's perception of inferior V water bodies, and to consolidate the effectiveness of the treatment by focusing on the precise treatment of pollution and taking the river outfall remediation as an entry point.In 2021, Beijing launched a comprehensive work of eliminating inferior work, the task into the annual plan of the battle of pollution prevention and control and the annual general river chief order, clear task objectives and the responsibility of each district. 2021 to Chaoyang, Fangshan, Daxing, Changping, Tongzhou District as the focus, "one river one policy" to develop "engineering + Management" management measures, the end of the year to achieve the city's dynamic zero inferior V rivers; 2022 focus on flood water quality fluctuations, through the development of "clean river" "clean tube" action to further protect the results of the elimination of inferior, the use of monitoring, Early warning, notification and other means to prevent the rebound of poor V water bodies. Up to now, 100 municipal examination section no inferior V water bodies.    In addition, Beijing deepened the management of river outfalls, the city in accordance with the "investigation, measurement, traceability, treatment, management" idea, in the "investigation of the discharge, measurement of water quality, traceability" on the basis of highlighting the "treatment "work, 2021 to start the river outfall remediation work, is expected to be completed by the end of this year, and strive to complete the national goal three years ahead of schedule. Implementation of "management" means, the construction of more than 200 sets of spectral automatic monitoring equipment, the construction of real-time early warning system, in Shunyi, Fengtai and other districts pilot law enforcement inspection, cleaning and remediation work linkage, the basic completion of "receiving water bodies - outfall -Discharge channel - discharge units" the whole process of supervision system.    Since the "Thirteenth Five-Year Plan", Beijing has continued to implement regional compensation policies for the water environment, "good water can get money, poor water to pay".    The person in charge of the Beijing Municipal Bureau of Ecology and Environment, with the city's water ecological environment quality continues to improve, compensation from 970 million yuan in 2015 to 21.6 million yuan in 2021, the city's good water quality river head ratio from 48% in 2015 to 75.2% in 2021, chemical oxygen demand (COD), ammonia nitrogen and other major pollutant concentrations fell by more than half. Highlight the "strong ecology", explore water ecology restoration     With the goal of "clear water and green shore, fish flying in the shallow bottom", Beijing is carrying out pilot demonstrations in key areas and trying to explore the "Beijing path" of water ecological restoration.    From 2020 to 2021, the Beijing Ecological Environment Monitoring Center continued to carry out monitoring and evaluation of water ecological environment quality in the city, and conducted a more comprehensive survey and monitoring; from 2022, the city's water ecological environment quality monitoring is included in the regular business work, and more than 200 monitoring points are set up in the city's five major water systems, with physical and chemical, aquatic life and habitat as monitoring indicators, covering rivers, lakes, reservoirs and other different water bodies. Lakes, reservoirs and other different water bodies, regular investigation and monitoring. The evaluation results show that the overall quality of the city's water ecological environment is good, about 55% of the river water ecological environment quality status is excellent, the city's five major water systems are monitored to clean water body indicator species.    "Technology Empowerment" is also improving the monitoring capacity of Beijing's water ecology and environmental quality. The reporter learned that the Beijing Ecological Environment Monitoring Center uses artificial intelligence, underwater observation, environmental DNA technology (eDNA for short) and other technologies to carry out the construction of a water ecology intelligent observation system and genetic sequencing of water ecology and environmental quality. In Daxing District Xinfeng River and Fengtai District Yuanbo Lake, it has taken the lead in building a real-time intelligent observation platform for fish, realizing real-time fish monitoring records and artificial intelligence identification, and more intuitive and convenient tracking and evaluation of the effectiveness of water ecology management and restoration.    The city's natural shoreline retention rate will be 67.9% in 2021, with the Yongding River, Chaobai River and Wenyu River reaching more than 75%. In particular, after the implementation of the restoration of the Xinfeng River in Daxing District, the water quality improved from poor V to IV, and the coverage of aquatic plants in the river reached more than 70%, and the water ecology improved significantly. In addition, new restoration paths were explored in the western part of the river in Fengtai District to promote multi-factor, basin-wide system restoration and improvement.    Good quality of water ecology and environment should be clear and clear, but also have fish and grass, and fish flying in the shallows. In addition to the obvious improvement in the quality of the city's water environment, according to the results of the monitoring and evaluation of the quality of the city's water ecological environment carried out by the Beijing Ecological Environment Monitoring Center, the city is rich in aquatic species, with 134 species of phytoplankton, 231 species of zooplankton, 284 species of benthic animals and 41 species of fish monitored in the main trunk and tributaries of the five major water systems, key lakes and large and medium-sized reservoirs.    "The green hills are not inked for a thousand years, and the green water is stringless for ten thousand years." Nowadays, more and more natural beauty is becoming the background of Beijing citizens' life.