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/pictureCinema 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 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 “Komiks the most polluted river in the Pearl River.” In recent years, the provincial party committee has attached great importance to the comprehensive water environment rectification work. Provincial Party Secretary Li Xi became the first river chief in the province and took 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 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 management 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 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. In the past, she could only 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 “curved” river beach of 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 combined the comprehensive functions of 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… Today, 500Komiks various 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 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 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 (pre-treatment of Babaylan), wandering flower sea tour area (vertical undercurrent wetland), gurgling stream conservation area (top stream wetland), etc., the water flowing out of the wetland park can reach the IV standard of surface water, and then replenish the Babaylan and improve Maozhou. href=”https://comicmov.com/”>KomiksThe water quality in the middle and upper reaches of the river.
Innovation
The mud on the mud flat “turns into” permeable bricks
In the process of managing the Maozhou River, one of the major problems stems from dealing with the 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.
Comprehensive improvement of water environment in Maozhou River Basin of China Power ConstructionTao Ming, director of the command office, 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 matter.
In order to help Cinema find a better “residence” of these bottom muds, the Shenzhen Municipal Government worked with China Power Construction to excavate, deal with and reuse these sludges.
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 subsidy 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 washed through the mud and sand separation system is used for artificial ground, pipe network engineering trench backfilling, 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 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 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 the asynchrony of the main and tributary rivers, segmented governance, and fragmented construction. In order to change this situation, the Guangdong Provincial Department of Ecology and Environment took the lead in the management supervision of key river basins such as Maozhou River, and established the “Provincial Department of Ecology and Environment + Shenzhen, Dongguan + Bao’an District, Komiks GuangmingThe “1+2+3″ working framework for comprehensive remediation of Maozhou River in districts and Chang’an Town” was established, and the “two-week and one meeting” working mechanism was established. So far, four comprehensive remediation coordination meetings for the Maozhou River Basin pollution have been successfully held, forming a “one map” for water quality notification, and the engineering measures have been “one Cinema table”, and a good communication work coordination and promotion mechanism has been established. At the same time, Shenzhen and Dongguan City have carried out joint cross-law enforcement actions in the Maozhou River Basin href=”https://comicmov.com/”>Cinema 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 the unremitting efforts of the Provincial Department of Ecology and the two cities, the water quality of Maozhou River has undergone significant changes. Data shows that from January to December 2018, the section of the Maozhou River Gonghe Gonghe National Examination Section Ammonia nitrogen and total href=”https://comicmov.com/”>BabaylanPhospheric phosphorus 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.
Plan
Promote industrial upgrading in the basin
In the Yanluo Wetland of Maozhou River, a display board was established with the words “One axis and two” The riverside plan with five zones is to use water as the driving line, stitch 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. The “two zones” refer to the design of waterfront landscape belts and water landscape belts. The “five zones” refer to the five areas of Science and Technology Innovation Water Bank, Greenway Living Room, Charming Industrial City, Vibrant Corridor and Hi-Tech Smart Valley.
In the Maozhou River governance plan, the reporter saw that the future planning of this river is clearly defined. Komiks writes “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 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.