Maozhou River is black and smellyCinemaBefore water treatment
After the black and smelly water treatment
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 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 National Examination decreased significantly by 35.2% and 41.1% year-on-year respectively.
The once rotten river beaches and stinky ditches have now become wetland parks and green roads 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 control and city control with production control to promote regional environmental optimization, comprehensive utilization of basin space, transformation of industrial structure, and improvement of urban functions, 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 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 Bao’an District for more than 8 years and used to be able to take her children to the city park 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 Babaylan and uploaded photos to your friends circle.” When Liu Yilin first came to Yanluo Wetland, he was a little bit like this.Don’t believe in your own eyes.
In the past, the two sides of the Maozhou River were mudflats, and the black mud more than one meter deep exuded a pungent stench, and passers-by had to cover their noses and walk. Now, the “monochromatic” Babaylan River beach, more than 800 meters above the upper reaches of the Maozhou River, has been built into a riverside wetland park-Yanluo Wetland, through ecological restoration and protection, and 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 smelly” to “colorful”! Pinky yellow canna, purple-blue Zheli flowers, gray-green flower-leaf reeds, green windmill grass… Nowadays, more than 500 plants have enabled Yanluo Wetland to have flowers all year round, and many birds also appear here.
There are also “secrets” hidden at the roots of these plants. “Most of the organisms planted in wetland parks take into account the dual functions of beautification and water quality purification.” Hu Haitao, director of the Maozhou River Management Center of the 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 purification by ecological purification science popularization area (pretreatment), Wandering Flower Sea Tour Area (vertical undercurrent wetland), gurgling stream conservation area (top flow wetland), etc., the water flowing out of the wetland park can meet the IV standard of surface water, thereby replenishing and improving 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 dealing with the 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. Tao Ming, director of the Office of the Maozhou River Governance Command of China Power Construction, mentioned in an interview with the media that the water quality of Maozhou River is not only pollution of organic matter, but also severe pollution of inorganic matters.
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, walking on the Maozhou RiverMultiple dredgers. After these dredgers circle the river channel, they send the silt through pipes to the Maozhou River No. 1 subsilt treatment plant of China Power Construction Maozhou River on the bank of 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 after dehydration and harmless treatment of the contaminated bottom sludge is mainly used for the filling of the dam or other engineering foundations. In addition, part of the residual soil is used for carbonized ceramic granules and brick making. At the same time, the remaining sand washed through the mud and sand separation system is used for backfill of artificial ground, pipeline engineering trench, etc. after being tested for harmlessness by sand washing and screening.
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 the “one map” of river managementCinema
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 in the basin.
Maozhou River is located in the northwest of Shenzhen. The main stream is Babaylan flows through Guangming District, Bao’an District and Chang’an Town, Dongguan City, with a basin area of 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 coordination meetings on the comprehensive pollution control of Maozhou River have been successfully held, forming a “one map” for water quality notification, and the projectThe measures are “one table” and a good communication work coordination and promotion mechanism has been established.
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 45 enterprises with environmental problems, 21 cases were filed, 24 were rectified, and 1 case was seized and seized.
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% year-on-year and 6Cinema1.1%, 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 Gonghe Village, Maozhouhe, decreased significantly by 35.2% and 41.1% year-on-year respectively. Water quality maintains rapid improvement.
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 the ecology, industry, culture, characteristic space and other charming blocks of the one and the other 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 management of Maozhou River, 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 pilot section of the Maozhou River Greenway, 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, so that precious and limited water resources can be used for the economy and society.Sustainable development provides long-term support and is an important test facing water governance in the future.