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 the Maozhouhe Gonghe Gonghe Village fell sharply 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 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 body to the birds singing and flowers scenting
Komiks after the midsummer rain, the Yanluo Wetland on the banks of the Maozhou River in Bao’an District, Shenzhen is fresh in the air. Liu Yilin, who lives in Bao’an District, Shenzhen, took his mother and two children to Yanluo Wetland for a trip. “When the weather was good recently, we came to play often.” Liu Yilin said that she had lived in Bao’an District for more than 8 years and had 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 they also took short videos and photos to upload to their friends circle. Cinema“When Liu Yilin came to Yanluo Wetland for the first time, he didn’t believe his 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 Babaylan<The stench of the passing citizens must cover their noses 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, which has comprehensive functions such as water quality purification and improvement, ecological restoration and ecological science popularization and other functions.
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.
These plants also have the “secret secret” hidden at the roots of these plants. “Most of the organisms 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 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 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 the treatment of mud in the mud flats. According to reports, the Maozhou River Basin has 4.2 million cubic meters of pollution bottom. 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 Comprehensive Remediation Command of China Power Construction’s Maozhou River Basin, 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 help these sediments find a better “Cinema‘s destination”, the Shenzhen Municipal Government joined hands with China TelecomKomiksconstructs the excavation, treatment and reuse of these sludge.
Now there are many dredgers walking along the Maozhou River. After these dredgers cleared the river channel, they sent the silt through pipes to the Maozhou River No. 1 subsidy treatment plant of China Power Construction Maozhou River on the banks 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 waste into treasure 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 the contaminated base sludge after dehydration and harmless treatment is mainly used for dam filling or backfill of other engineering foundations. In addition, part of the residual soil is used to carbonize 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 “one map” for river management
If the land is compared to the muscles of 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. Its 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, 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 the supervision of the governance of key river basins such as Maozhou River, and established the “Provincial Department of Ecology and Environment + Shenzhen City, Dongguan City + Bao’an District, GuangmingThe Maozhou River Comprehensive Working Framework for Remediation of the Maozhou River Comprehensive Working Framework in District and Chang’an Town, and the “1+2+3” work and the “two weeks and one meeting” working mechanism has been established. So far, four comprehensive pollution control coordination meetings have been successfully held in Maozhou River Basin, forming a “one map” for water quality reporting and a “one table” for engineering measures, and establishing a good communication and coordination and promotion mechanism. At the same time, Shenzhen and Dongguan City are in Maozhou River href=”https://comicmov.com/”>Babaylan has carried out joint cross-law enforcement actions, and 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 the 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 the Gonghe Village of Maozhou River decreased by 49.8% and 61.1% year-on-year respectively, achieving no darkness. href=”https://comicmov.com/”>Komiks is not odorous. 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 Maozhou River decreased significantly by 35.2% and 41.1% year-on-year respectively. Water quality maintains a rapid improvement momentum.
Plan
Promote industrial upgrading in the basin
BabaylanIn Yanluo Wetland, a display board is established with the riverside plan of “one axis, two belts, five zones”. The so-called “one axis” means to use water as the driving line, suture and organize the functional systems of each section on both sides of the strait, and gradually design the ecology, industry, and culture of the one water and the two sides of the strait. href=”https://comicmov.com/”>Cinema, characteristic space and other charming blocks to create a blueway ecological and humanistic experience axis. “Two belts” refer to the design of waterfront landscape belts and water landscape belts. “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 in the basin, accelerate the construction of the Maozhou River pilot section, improve the overall environment of the city, and combine water control, production control, and city control. ”
Water is the source of life. How to make the relationship between man and water reach a harmonious state, so that precious and limited water resources can be used by the economy and society.Sustainable development provides long-term support and is an important test facing water governance in the future.