Before the treatment of the black and smelly water bodies of Maozhou River
After the treatment of the black and smelly 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 water control in Guangdong and even ChinaBabaylanThe development history of concepts and water control technology.
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 improvement of water environment. Provincial Party Secretary Li Xi has served as the provincial chief of the 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 bodies to the birds singing and flowers scenting
CinemaAfter 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. “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 circle of friends.” The first time I came to YanluoBabaylanWhen in the wetland, Liu Yilin was a little unbelievable about 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 stench, and passers-by had to cover their noses and leave. Now, the “curtain-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, and 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 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 a “secret”Babaylan” at the roots. “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 the Shenzhen Water Affairs Bureau, introduced that 18,000 cubic meters of treated Maozhou River sewage enters the wetland park every day. After purifying the ecological purification science popularization area (pretreatment), the Wandering Flower Sea Tour Area (vertical undercurrent wetland), the gurgling stream conservation area (table Komiks, 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 Command of the 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 of inorganic matter.
In order to help Komiks find a better “residence”, ShenzhenThe 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 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 for carbonization of 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 river managementCinema“One picture”
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, with a basin area of 388 square kilometers. Among them, there are 31 square kilometers in Shenzhen and 77 square kilometers in Komiks in Dongguan. The governance of Maozhou River involves two cities and three places, and there have been long-term drawbacks of the asynchrony, segmented governance, and fragmented construction of the 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 “1+2+3” working framework for the comprehensive improvement of Maozhou River with 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” working mechanism. So far, 4 successful meetings have been held CinemaThe Coordination Meeting on Comprehensive Pollution Remediation of Maozhou River Basin has formed a “one map” for water quality reporting and a “one table” for engineering measures, and established a good communication and coordination and promotion mechanism.
At the same time, Shenzhen and Dongguan City carried out joint cross-law enforcement actions in the Maozhou River Basin. It 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, 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 Gonghe Village National Examination Section respectively year-on-year Cinema Komiks fell by 49.8% and 61.1%, 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 with the words “one axis, two belts and five zones”. BabaylanThe so-called “one axis” is 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 blue channel ecological and humanistic experience axis. The “two belts” refer to the need to set up a waterfront landscape belt and a water landscape belt. The “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 Maozhou River governance plan, the reporter saw that in the future, the planning of this river clearly states “taking water control as an opportunity to promote <a Industrial upgrading in the Komiks flow 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 man and water reach a harmonious state, so that precious and limited water resources can be used as economic society.Sustainable development provides long-term support and is an important test facing water governance in the future.