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 pilot section of the Maozhou River in Wanli Bidao, Guangdong Province 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 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 they also 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 “monochromatic” river beach over 800 meters above the upper reaches of the Maozhou River has been built into a riverside wetland park – Yanluo Wetland, which has both water quality purification and improvement and ecological restoration and protection.href=”https://comicmov.com/”>Cinema, landscape leisure and recreation, ecological science popularization and other comprehensive functions.
The Maozhou River has changed, from “black and smelly” to “colorful”! Pinky yellow canna, purple-blue Zhelihua, gray-green Cinema flower leaves and reeds, green windmill grass… Nowadays, more than 500 plants have enabled Yanluo wetland to have flowers all seasons, and many birds also appear here.
There are also “secrets” 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 Office of the River Management Center of Shenzhen Water Affairs Bureau, introduced that 1.8 million cubic meters of treated Maozhou River sewage enters the wetland park every day. After purifying the ecological purification science area (pretreatment), the Wandering Flower Sea Tour Area (vertical undercurrent wetland), the Komiks gurgling stream conservation area (top stream wetland), and other areas, the water flowing out of the wetland park can meet the standard of surface water Class IV, and then Cinema replenishes and improves 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 Cinema be transported to? 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, previously mentioned in an interview with the Babaylan media that the water quality of the 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 there are many dredgers walking along the Maozhou River. After these dredgers carry out environmental protection and dredging of the river, they transport the sludge through pipes to the Cinema China Power Construction Maozhou River No. 1 subsilt treatment plant on the banks of the Maozhou River. According to Zhai Deqin, deputy chief engineer of China Power Construction Water Environment Management Technology Co., Ltd., turning these silt into treasures in an environmentally friendly way is the key to treating these silts.
It is understood that the residual soil formed by the polluted bottom silt after dehydration and harmless treatment is achieved. href=”https://comicmov.com/”>Babaylan, or mud cake, 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 and sand separation system is used for backfill of artificial land and pipeline engineering trenches, etc.
It is understood that each permeable brick in Yanluo Wetland originates 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 is achieved<a The "one picture" of the 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 in the basin. The 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 basin area is 388 square kilometers. Among them, 311 square kilometers are in Shenzhen and 77 square kilometers are in Dongguan. href=”https://comicmov.com/”>Komiks. 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 the main and tributary rivers. To change this situation, the Guangdong Provincial Department of Ecology and Environment took the lead in supervising 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, Guangming City, Cinema District,The “1+2+3” working framework for comprehensive remediation of Maozhou River in Chang’an Town, and the “two weeks and one meeting” working mechanism has been established. So far, four comprehensive remediation 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 mechanism. At the same time, Shenzhen and Dongguan City have carried out joint cross-law enforcement in the Maozhou River Basin href=”https://comicmov.com/”>Babaylan operation 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, the Maozhou River Republic Village National Examination was held. Ammonia nitrogen and total phosphorus in the section 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 the Gonghe Village of Maozhou River decreased significantly 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 was established with the riverside plan “one axis, two belts and five zones”. The so-called “one axis” means to use water as the driving line, sewing and <a Cinema organizes the functional systems of each section on both sides of the strait, and gradually designs the charming blocks such as ecological, industrial, cultural, and characteristic spaces on both sides of the strait to create a blue channel ecological and humanistic experience axis. The “two belts” refer to the design of a waterfront landscape belt and a water landscape belt. The “five zones” refer to the five areas of Science and Technology Innovation Waterfront, Green Channel Living Room, Charming Products City, Vitality Corridor and Hi-Tech Intelligence Valley. Management of Maozhou River In the 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 environment of the city, and achieve a combination of 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 societySustainable development provides long-term support and is an important test facing water governance in the future.