Before the treatment of the black and smelly water bodies in Maozhou River
After the treatment of the black and smelly water bodies in Maozhou River
Text/Photo Jinyang.com reporter Tan Zheng Hou Mengfei
From the treatment of the black and smelly water bodies in Maozhou River, only The 41.61-kilometer-long Maozhou River is not conspicuous; but in Guangdong’s water control map, 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 the Maozhouhe Gonghe Gonghe Village fell sharply by 35.2% and 41.1% year-on-year respectively.
The old rotten river beaches and stinky ditches have now become wetland parks and greenways along the river. In March this year, the pilot section of the Maozhou River in Wanli River in Guangdong was fully started. The Maozhou River Basin will combine water management, city management with production management, promote regional environmental optimization, comprehensive utilization of basin space, industrial structure transformation and urban functions, and become 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 Bao’an District, Shenzhen, took his mother and two children to Yanluo Wetland for a trip. “We often come to play when the weather is good recently.” Liu Yilin said that she has lived in the Babaylan district of Bao’an for more than 8 years. In the past, she could only take her children to the park in the city to play.
Until the end of last year, her circle of friends was flooded with Yanluo Wetland. “Many friends came to the wetland to play and took short videos and photos to upload to their circle of friends.” When they first came to Yanluo Wetland, Liu Yilin was the one who came to Yanluo Wetland.I don’t believe in my eyes.
In the past, there were mudflats on both sides of the Maozhou River, and the black mud more than one meter deep exuded a pungent stench. Passing by was about to cover one’s nose and leave. Now, the “curve-shaped” river beach over 800 meters on the upper reaches of the Maozhou River has been built into a riverside wetland park – Yanluo Wetland after ecological restoration and protection, and has comprehensive functions such as water quality purification and improvement, ecological restoration and recreation, ecological science popularization and education.
Maozhou River has changed, from “black and smelly” to “five colorful”! Pinky yellow canna, purple and blue Komiks’s reeds, gray-green flower leaves and reeds, green windmill grass… Today, more than 500 plants have enabled Yanluo wetland to have flowers all year round, and many birds also appear here. Komiks
These plants still have “secrets” hidden at the roots. “Most of the creatures planted in the wetland park take into account the dual functions of beautification and water quality purification.” Hu Haitao, director of the Maozhou River Management Office of the River Management Center of the Shenzhen Water Affairs Bureau, introduced that 18,000 cubic meters of treated Maozhou River sewage enters the wetland park every day. After purifying by ecological purification science popularization area (pretreatment), Wandering Flower Sea Tour Area (vertical undercurrent wetland), gurgling stream conservation area (top stream wetland), etc., the water flowing out of the wetland park can reach the standard of surface water IV, and then supply and improve the water quality in the middle and upper reaches of the Maozhou River.
Innovation
The mud on the mud flat “turns into” permeable bricks
In the process of Maozhou River management, one of the major problems stems from the treatment of mud in the mud flats. According to reports, there are 4.2 million cubic meters of polluted sediment in the Maozhou River Basin. Where can these sediments be transported? How to deal with it? Will it cause secondary pollution? It is an inevitable part of the management of Maozhou River.ov.com/”>Cinema.
Tao Ming, director of the Office of the Maozhou River Basin of China Power Construction Maozhou River Basin, mentioned in an interview with the media that the water quality of Maozhou River is not only pollution from organic matter, but also href=”https://comicmov.com/”>BabaylanThere are severe pollution from inorganic substances.
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 silts.
Now there are several dredgers running on the Maozhou River. After these dredgers carry out environmental protection and dredging of the river, they send the silt to the Maozhou River No. 1 bottom mud treatment plant in China Power Construction on the banks of the Maozhou River through pipelines.
According to China Power Construction Water Environmental Treatment Zhai Deqin, deputy chief engineer of Science and Technology Co., Ltd., introduced that turning these silt into treasures in an environmentally friendly way is the key to treating these silt.
It is understood that the residual soil or mud cake formed by dehydration and harmless treatment of polluted bottom silts is mainly used for backfill of dikes or other engineering foundations. In addition, part of the residual soil is used to make ceramic granules and bricks by carbonizing. At the same time, the residual sand washed through the mud-sand separation system, and after being screened and tested for harmlessness, it is used for backfill of artificial ground and pipeline engineering trenches, etc.
It is understood that every BabaylanThe permeable bricks all originate from the bottom mud dug in the Maozhou River. These bottom muds return to the Maozhou River in another aspect.
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 flowing through different administrative regions can only be managed in cities and cooperatively in the basin. Only then can the old look be replaced.
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, with a basin area of 388 square kilometers. Among them, 311 square kilometers in Shenzhen and 77 square kilometers in Dongguan.
The governance of Maozhou River involves two cities and three places, and there are 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 the “1+2+3” working framework for the comprehensive improvement of Maozhou River in the “Provincial Department of Ecology and Environment + Shenzhen, Dongguan City + Bao’an District, Guangming District, Chang’an Town”, and established a “two weeks and one meeting” working mechanism. InterceptSo far, four comprehensive pollution control coordination meetings have been successfully held in the Maozhou River Basin, forming a water quality notification “a picture” and a project measure “a table” and a good communication 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. Three times this year, Shenzhen and Dongguan dispatched 657 law enforcement personnel, inspected 190 enterprises, and found that there were environmental problems. Komiks were found to have 45 enterprises, 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, ammonia nitrogen and total phosphorus in the national examination section of Maozhouhe Gonghe Village decreased by 49.8% and 61.1% year-on-year respectively, achieving neither black nor odor. In the first five months of this year, the total phosphorus concentrations of Maozhouhe Gonghe Gonghe National Examination were significantly reduced by 35.2% and 41.1% year-on-year respectively. Water quality maintains rapid improvement momentum.
Planning
Promote industrial upgrading in the river basin
In the Yanluo Wetland of Maozhou River, a display board is erected 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 waterfront landscape belts and water landscape belts. The “five zones” refer to five areas: Science and Technology Innovation Waterfront, Greenway Living Room, Charming Industrial City, Vitality 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 that “taking water control as an opportunity to promote industrial upgrading within the flow area, accelerate the construction of the Maozhou River Greenway pilot Babaylan section, improve the overall urban environment, and combine water control, production control and city management.” 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 provide long-term support for the sustainable development of the economy and society is an important face in the future of water governance.micmov.com/”>KomiksTest.