Before the treatment of the black and odorous water bodies of Maozhou River
After the treatment of the black and odorous water bodies of Maozhou River
Text/Photo Jinyang.com reporter Tan Zheng Hou Mengfei
From the map, the Maozhou River, which is only 41.61 kilometers long, is not conspicuous; but in the water control map of Guangdong, it is definitely a river that cannot be ignored, and it is enough to be written into the development history of water control concepts and water control technology in Guangdong and even China.
As the boundary river between Shenzhen and Dongguan, Maozhou River was once the “most polluted river in the Pearl River”. In recent years, the provincial party committee has attached great importance to the comprehensive water environment improvement work. Provincial Party Secretary Li Xi has served as the province’s first river chief and has taken the lead in supervising the pollution control of Maozhou River. After three stages of effective governance, Shenzhen and Dongguan cooperated to fight, and the water quality of Maozhou River has been significantly improved. Data shows that in the first five months of this year, the ammonia nitrogen and total phosphorus concentrations in the national examination section of Maozhou Hegonghe Village fell sharply by 35.2% and 41.1% year-on-year respectively.
The former Cinema rotten river beaches and stinky ditches have now become wetland parks and greenways along the river. In March this year, the Maozhou River pilot section of Wanli Bidao, Guangdong started construction. The Maozhou River Basin will combine water management, city management and production management to promote regional environmental optimization, comprehensive utilization of basin space, industrial structure transformation, and urban functions improvement, becoming a model area for comprehensive governance and development of “river + industry + city”.
Great changes
From the black and smelly water bodies to the singing of birds and the fragrance of flowers
After the midsummer rain, the air in Yanluo wetland on the banks of Maozhou River in Bao’an District, Shenzhen is fresh. Liu Yilin, who lives in the Cinema District, Bao’an, Shenzhen, took his mother and two children to visit Yanluo Wetland. “We often come to play recently when we are in good health.” Liu Yilin said that she has lived in Bao’an District for more than 8 years and used to be able to take her children to the city park to play.
Until Komiks at the end of last year, her circle of friends was flooded with Yanluo Wetland. “Many friendsMy friend came to the wetland to play, and also took short videos and photos to upload them to the friend Cinema circle. “When Babaylan came to Yanluo Wetland once, Liu Yilin was a little unbelievable about his eyes.
In the past, there were mudflats on both sides of the Maozhou River, and the black silt more than one meter deep exuded a pungent stench. Passersby had to cover their noses. Now, the “curtain-shaped” river beach more than 800 meters above the Maozhou River has been built into a riverside wetland park – Yanluo Wetland after ecological restoration and protection, which has comprehensive functions such as water quality purification and improvement, ecological restoration and protection, landscape leisure and recreation, ecological science popularization and education.
The Maozhou River has changed, from “black and smell” to “colorful”! Pink yellow cannas, purple-blue Zheli flowers, gray-green flower leaves and reeds, and verdant windmill grass…Cinema Today, more than 500 plants have enabled Yanluo Wetland to have flowers all seasons, and many birds also appear here.
These plants also have “secrets” hidden at the roots. “Most of the creatures planted in wetland parks are Komiks both take into account the dual functions of beautification and water purification. ” Hu Haitao, director of Maozhou River Management Office, River Management Center of Shenzhen Water Affairs Bureau, introduced that 18,000 cubic meters of treated Maozhou River sewage enters the wetland park every day. After purifying the ecological purification science area (pretreatment), Wandering Flower Sea Tour Area (vertical undercurrent wetland), and gurgling stream conservation area (top stream wetland), the water flowing out of the wetland park can meet the standard of surface water Class IV, thereby replenishing and improving the water quality of the middle and upper reaches of the Maozhou River.
Innovation
Tidal flat silt “turned into” permeable bricks
Control in Maozhou River<a In the process of Babaylan, one of the major problems stems from the treatment of silt in the mudflats. According to reports, there are 4.2 million cubic meters of polluted bottom silt in the Maozhou River Basin. Where can these bottom silt be transported? How to deal with it? Will it cause secondary pollution? It is an inevitable part of the Maozhou River control. Tao Ming, director of the Office of the Maozhou River Comprehensive Water Environment Remediation Command of China Power Construction, mentioned in an interview with the media that the water quality of the Maozhou River is not only pollution of organic matter, but alsoThere is severe pollution in inorganic matter.
In order to find a better “residence” of these bottom muds, the Shenzhen Municipal Government worked with China Power Construction to excavate, process and reuse these sludge.
Now there are many dredgers walking along the Maozhou River. After these dredgers carried out environmental protection and dredging of the river, they sent the sludge through pipelines to the Maozhou River No. 1 subsilt treatment plant of China Power Construction Maozhou River on the bank of the Maozhou River.
According to Zhai Deqin, deputy chief engineer of China Power Construction Water Environmental Governance Technology Co., Ltd., turning these silt into treasures in an environmentally friendly way is the key to dealing with these silt.
It is understood that the residual soil or mud cake formed by dehydration and harmless treatment of contaminated bottom sludge is mainly used for dam filling or other engineering foundation backfill. In addition, part of the residual soil is used to make ceramic granules and bricks. At the same time, the remaining sand washed through the mud and sand separation system is used for artificial ground, pipe network engineering trench backfilling, etc. after being washed and screened, and is detected to be harmless.
It is understood that every permeable brick in Yanluo Wetland originates from the bottom mud dug in Maozhou River. These bottom muds returned to the Maozhou River with a different appearance.
Co-governance
Shenzhen-Dong Kong cooperation to achieve “one map” for river management
If the land is compared to the muscles of the human body, the river can be regarded as the blood vessels of the human body. The Maozhou River, which flows through different administrative regions, can only be transformed into a new look under the city and cooperative governance of the river basin.
Maozhou River is located in the northwest of Shenzhen. The main stream flows through Guangming District, Bao’an District and Chang’an Town, Dongguan City. The Cinema basin area is 388 square kilometers. Among them, there are 311 square kilometers in Shenzhen and 77 square kilometers in Dongguan.
The governance of Maozhou River involves two cities and three places, and there have been long-term drawbacks of out-of-synchronization, segmented governance, and fragmented construction of main and tributary rivers. In order to change this situation, the Guangdong Provincial Department of Ecology and Environment took the lead in carrying out supervision of the governance of key river basins such as Maozhou River, and established a “1+2+3” working framework for the comprehensive improvement of Maozhou River with the “Provincial Department of Ecology and Environment + Shenzhen, Dongguan City + Bao’an District, Guangming District, and Chang’an Town”, and established a “two weeks and one meeting” working mechanism. So far, four comprehensive pollution control coordination meetings have been successfully held in Maozhou River Basin, forming a “one map” for water quality notification, a “one table” for engineering measures, and establishing a good communication Komiks work coordination and promotion mechanism.
At the same time, Shenzhen and Dongguan City carried out joint cross-law enforcement operations in the Maozhou River Basin. It has been carried out three times this year. Shenzhen and Dongguan dispatched 657 law enforcement personnel, inspected 190 enterprises, found 45 enterprises with environmental problems, filed 21 cases, rectified 24 cases, and seized 1 case.
After unremitting efforts of the Provincial Department of Ecology and Environment and the two cities, the water quality of Maozhou River has undergone significant changes. Data shows that from January to December 2018, the total ammonia nitrogen and Cinema’s national examination sections of Maozhouhe Gonghe Gonghe fell by 49.8% and 61.1% year-on-year respectively, achieving neither black nor odor. In the first five months of this year, the ammonia nitrogen and total phosphorus concentrations in the national examination section of the Gonghe Village of Maozhouhe Province fell sharply by 35.2% year-on-year respectively. Water quality maintains rapid improvement momentum.
Plan
Promote industrial upgrading in the river basin
In the Yanluo Wetland of Maozhou River, a Babaylan exhibition board is established with the riverside plan of “one axis, two belts, and five zones”. The so-called “one axis” means to use water as the driving line, sew and organize the functional systems of each section on both sides of the strait, and gradually design charming blocks such as ecology, industry, culture, and characteristic spaces on both sides of the strait to create a blueway ecological and humanistic experience axis. “Two belts” refer to the design of a waterfront landscape belt and a water-mounted landscape belt. The “five zones” refer to five areas: Science and Technology Innovation Waterfront, Greenway Living Room, Charming Industrial City, Babaylan Power Corridor and Hi-Tech Smart Valley.
In the Maozhou River governance plan, the reporter saw that in the future, the planning of this river clearly states, “Take water control as an opportunity to promote industrial upgrading in the basin, accelerate the construction of the Maozhou River Greenway pilot section, improve the overall urban environment, and combine water control, production control and city control.”
Water is the source of life. How to make the relationship between people and water reach a harmonious state, and make precious and limited water resources improve the sustainable development of the economy and society.nProviding long-term support is an important test facing water governance in the future.