Before the treatment of the black and smelly water body of Maozhou River
Before the treatment of the black and smelly water body of Maozhou RiverKomiks
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 can 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 stinky river beaches and smelly waters of the former Babaylan waters have now become wetland parks and greenways 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 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 visit the city’s Komiks District Park.
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.
Previously, MaoCinemaThere are mudflats on both sides of the Zhou River. The black mud is more than one meter deep and emits a pungent stench, and passers-by have to cover their noses. Now, the “curtain-shaped” river beach more than 800 meters above the upper reaches of the Maozhou River has been built into a riverside wetland park – Yanluo Wetland, which has comprehensive functions such as water quality purification and improvement, ecological restoration, landscape leisure and recreation, and ecological science popularization.
The Maozhou River has changed, from “black and smell” to “colorful”! The pink and yellow href=”https://comicmov.com/”>Cinema canna, purple-blue Rheeli flowers, gray-green flower-leaf reeds, green windmill grass… Today, more than 500 plants have enabled Yanluo Wetland to have flowers all seasons, and many birds also appear here.
The roots of these plants are still hidden. “Most of the creatures planted in wetland parks take into account the dual functions of beautification and water purification. ” Hu Haitao, director 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, and passes through the ecological purification science popularization area (pretreatment), and wanders in the flower sea tour area (vertical<a<a<a After purifying areas such as DC submerged wetlands), gurgling stream conservation area (top stream wetlands), 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
Tidal flat silt “turned into” permeable bricks
In the process of Maozhou River management, one of the major problems stems from the treatment of silt in the mud. According to reports, there are 420Babaylan 10,000 cubic meters of polluted bottom sludge. Where can these bottom sludge be transported? How to deal with it? Will it cause secondary pollution? It is an inevitable part of the Maozhou River control. Tao Ming, director of the Office of the Maozhou River Construction Maozhou River Basin, 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 in inorganic matters.
In order to find a better “residence” of these bottom sludge, Shenzhen Municipal GovernmentThe 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 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 selected through the mud and sand separation system is used for artificial ground, pipe network engineering trench backfilling, etc. after being tested for harmlessness after being washed and screened.
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 another 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 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 RiverKomiks involves two cities and three places, and has long had the disadvantages 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 comprehensive Maozhou River work framework for rectification of the “1+2+3” work framework for 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”. 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 City and Dongguan City carried out joint cross-execution operation in the Maozhou River Basin. It has been carried out three times this year. Shenzhen and Dongguan have 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 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 Maozhouhe Gonghe 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 sections of the Gonghe Village of Maozhouhe Province 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 the ecology, industry, culture, characteristic space and other charming blocks of the two 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 plan 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.