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. href=”https://comicmov.com/”>KomiksShe 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 “river with the most serious pollution in the Pearl River”. In recent years, the provincial party committee has attached great importance to the comprehensive water environment rectification work. Li Xi, Secretary of the Provincial Party Committee, has served as the province’s first river chief and has taken the lead in supervising the pollution rectification 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 parksBabaylan and the riverside blue road. In March this year, the Maozhou River pilot section of Guangdong Wanli Bididao, Guangdong will be fully started. The Maozhou River Basin will combine water control, city control and production control to 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 + Cinema City”.
Great changes
From the black and smelly water bodies to the singing of birds and fragrance of flowers
After the midsummer rain, the air in Yanluo wetland on the banks of Maozhou River in Baojiu, An District is fresh. Liu Yilin, who lives in Bao’an District, Shenzhen, came to Yanluoshi with his mother and two children.Travel locally. “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 “curve-shaped” river beach more than 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 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 reeds, 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. “Most of the organisms planted in the wetland parks 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 Bureau, introduced that 18,000 cubic meters of treated Maozhou River sewage enters the Cinema Wetland Park every day. After purifying by the ecological purification science popularization area (pre-treatment of Babaylan), the Wandering Flower Sea Tour Area (vertical undercurrent wetland), the gurgling stream conservation area (top stream wetland), and other areas, 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.
China Power Construction Maozhou River Basin Water RingTao Ming, director of the Office of the Komiks Department, mentioned in an interview with the media that the water quality of the Maozhou River is not only pollution of organic matter, but also severe pollution of inorganic matter.
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 carried out environmental protection and dredging of the river, they sent the sludge through pipelines to the Maozhou River No. 1 subsilt treatment plant of China Power Construction Maozhou River on the bank 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 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 by the contaminated bottom sludge after dehydration and harmless treatment is mainly used for dam filling or other engineering foundation backfilling. In addition, part of the residual soil is used for carbon-based ceramic granules and brick making. At the same time, after the residual sand washed through the mud and sand separation system, the residual sand was washed and screened to detect that it was free of damage, and it was used for artificial ground, pipeline engineering trench backfilling, etc.
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 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. The basin area is 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 and supervision 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, and Chang’an Town”, and established the “two weeks and one meeting Cinema” working mechanism. So far, four comprehensive pollution control coordination meetings have been successfully held in the 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 carried out joint cross-law enforcement operations in the Maozhou River Basin. It has been carried out three times this year. Cinema, a total of 657 law enforcement personnel were dispatched in Shenzhen and Dongguan, inspected 190 enterprises, found 45 enterprises with environmental problems, 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 Maozhou Hegonghe 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 concentrations of ammonia nitrogen and total phosphorus in the national examination sections of Maozhouhe Gonghe Gonghe fell sharply 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 CorridorKomiks and Hi-Tech Smart Valley. In the Maozhou River management plan, the reporter saw that in the future, the planning of this river clearly stated, “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 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.