Before the treatment of the black and odorous water bodies in Maozhou River
After the treatment of the black and odorous water bodies in Maozhou River
Text/Photo Jinyang.com reporter Tan Zheng Hou Mengfei
From the map, only href=”https://comicmov.com/”>Cinema The 41.61-kilometer-long Maozhou River 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 ditches of the former ravine beaches are now transformed into wetland parks and greenways along the river. In March this year, the Maozhou River pilot section of Wanli Bididao, Guangdong began to be fully constructed. The Maozhou River Basin will combine water control, city control with production control, 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 had to take her children to the city park to play before.
Until the end of last year, her Komiks‘s circle of friends was flooded with Yanluo Wetland.”Many friends came to the wetland to play and took short videos and photos to upload photos to friends.” 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 Zheli flowers, gray-green flower-leaf reeds, green windmill grass… Today, more than 500 plants have enabled the Yanluo Wetland to 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 wetland parks take into account the dual functions of beautification and water quality purification.” Hu Haitao, the Maozhou River Management Office of the River Management Center of Shenzhen Water Affairs Bureau Babaylan, introduced that 18,000 cubic meters of treated Maozhou River sewage enters the wetland park every day. After purging through ecological purification science popularization area (pretreatment), Wandering Flower Sea Tour Area (vertical undercurrent wetland), gurgling stream conservation area (top flow wetland), 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
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 Basin Comprehensive Water Environment Improvement Command of China Power Construction, mentioned in an interview with the media that the water quality of Maozhou River is not only an organic pollution, but also severe pollution in inorganic substances.
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 digging pieces of digging on the Maozhou RiverBoat. 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 Komiks Water Environment Governance Technology Co., Ltd., the key to using an environmentally friendly way to turn these silt into treasure is to deal with these silt. It is understood that the residual soil or mud cake formed by dehydration and harmless treatment of the stained bottom mud 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 the YanluoBabaylan wetland originates from the bottom mud dug in the Maozhou River. These sediments returned to the edge of the Cinema River in Maozhou with another face.
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 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 “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, Chang’an Town”, and established a “two weeks and one meeting” working mechanism. So far, Komiks have been successfullyThe four comprehensive pollution control coordination meetings were 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 and Dongguan City carried out joint cross-law enforcement operations in the Maozhou River Basin. Three times this year, Shenzhen and Dongguan dispatched 657 law enforcement personnel, inspected 190 enterprises, found 45 enterprises with environmental problems, filed 21 cases, and rectified 24 companies, 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 Maozhouhe Gonghe 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 ammonia nitrogen and total phosphorus concentrations 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.
Plan
Promote industrial upgrading in the river basin
In the Yanluo Wetland of Maozhou River, a display board is erected with the riverside planning of “one axis, two belts, 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 Corridor and Hi-Tech Smart Valley. In the Maozhou River governance 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 urban environment, and combine water control, production control and city management.” Water is the source of life. How to make the relationship between people and water reach a harmonious state, and make precious and limited water resources provide a long-term future for the sustainable development of economic society.The support of nema is an important test facing water governance in the future.