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. CinemaAfter three stages of effective governance, Shenzhen and Dongguan cooperated to fight, 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 control, city control and production control, promote regional environmental optimization and comprehensive utilization of basin space, transform industrial structure and enhance 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 singing of birds and the fragrance of flowers
After the midsummer rain, the air in Yanluo wetland on the banks of the 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. “When the weather is good recently, we often come to Babaylan to play.” 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 play in Komiks and took short videos and photos to upload to their friends circle.” When they first came to Yanluo Wetland, Liu Yilin was a little unbelievable.
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, and passers-by had to cover their noses and leave. Now, the “curved” 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 tourism.
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… Today, more than 500 plants make Yanluo Wetlands have flowers all year round, and many birds also appear here.
There are also “secrets” hidden at the roots of these plants. “Babaylan 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 Office 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 being purified by ecological purification science popularization area (pretreatment), Wandering Flower Sea Tour Area (vertical undercurrent wetland), and gurgling stream conservation area (top flow wetland), 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, 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 Basin Comprehensive Water Environment Improvement 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,href=”https://comicmov.com/”>BabaylanThe Shenzhen Municipal Government and China Power Construction work with China Power Construction to excavate, deal with 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 No. 1 sub-silt treatment plant of China Power Construction Maozhou River located on the banks of the Maozhou River. According to Zhai Deqin, deputy chief engineer of Cinema Co., Ltd., the key to using environmentally friendly methods to turn these sludge into Babaylan treasures is the key to dealing with these sludge.
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 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 the human body, the river can be regarded as the blood vessels of the human body. The Maozhou River, which flows through different political areas, 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. 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,The “1+2+3″ working framework for comprehensive remediation of Maozhou River in Guangming District and Chang’an Town” has been established, and the “two weeks and one meeting” working mechanism has been established. So far, four coordination meetings for comprehensive remediation of Maozhou River Basin have been successfully held, forming a “one map” for water quality notification 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 have carried out joint cross-law enforcement actions in the Maozhou River Basin. This year, three times have been carried out. Shenzhen and Dongguan have dispatched 657 law enforcement personnel and inspected 190 enterprises. href=”https://comicmov.com/”>Cinema, 45 enterprises with environmental problems were found, 21 cases were filed, 24 cases were rectified, and 1 case was seized and seized.
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, the ammonia nitrogen and total phosphorus in the national examination section of Maozhou River Gonghe 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 ammonia nitrogen and total phosphorus concentrations in the national examination section of Maozhou River Gonghe Gonghe decreased by 35.2% and 41.1% year-on-year respectively. Water quality maintained a rapid improvement momentum.
Planning
Promote industrial upgrading in the river basin
In the Yanluo Wetland of Maozhou River, a display board is established, with Komiks writes 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 charming blocks such as ecological, industrial, cultural, 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. “Five zones” refer to the five areas of Science and Technology Innovation Waterfront, Greenway Living Room, Charming Industrial City, Vitality Corridor and Hi-Tech Intelligence Valley.
In the management plan of Maozhou River, the reporter saw that Komiks in the futureBabaylan href=”https://comicmov.com/”>KomiksFor the planning of this river, it clearly states that “taking 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 man and water reach a harmonious state, so that precious and limited water resources can be sustainable for the economy and societyCinemaDevelopment provides long-term support and is an important test facing water governance in the future.