Ji'an City, Jiangxi Province: There are noodles in it, creating a "model room" of sponge cities

Inside the Houhe Park of Ji'an City, the pedestrian lanes and squares of water pavement transformation were made.

After the completion of the completion, Ji'an Houhe Park became a place for people to leisure.

The staff of the Ji'an Housing and Urban Construction Bureau did the reconstruction project of the water quality improvement of the river.

In the rainy season, the continuous heavy rain in Ji'an City, Jiangxi Province broke the Lao Liang who loved fishing. After a day of raining, Lao Liang brought fishing tackle early in the morning to go out to "release".

"I haven't been fishing for such a long time, is it necessary to find a long and larger reservoir?" The daughter -in -law asked Lao Liang. "No need to go to the Houhe Park not far away." Lao Liang said with a vigorous way, "Now there is our fishing resort."

The fishing attraction in Lao Liangkou was also crowned by nearby residents with many beautiful names, such as leisure, sports, good shots, good places, etc. Today, the Houhe Park, which everyone praised, was a place where people mentioned last year that they shook their heads: "I would rather move in the community and not go to Houhe" "Poor water quality in the park", "The pedestrian trails are full of moss" Essence

Drainage, decontamination help the mountains and water show

On the same day as Lao Liang, he went to Houhe Park on the same day, and Wang Chunchao, head of the sponge office of the Ji'an Housing and Urban -Rural Development Bureau, to go to the scene to inspect on the spot. It was one of his daily work. Rarely encountered the raining moment, Wang Chunchao put away raindrops and put on clean sneakers.

Don't worry about water and wet shoes after the rain? Facing the doubts of the China City Newspaper reporter, Wang Chunchao said with a smile: "The trails of Houhe Park have been transmitted to the water paving, and the situation of the road area will not appear again. ","

The change of Houhe Park is a microcosm of the construction of sponge cities in Ji'an. Since the release of the implementation plan of Ji'an Sponge City in 2017, the Ji'an Housing and Urban Construction Bureau has set up a sponge office and formulated a series of measures. In terms of point governance, a number of boutique projects such as Houhe Park, Yangmingxi Road, Ji'an West Station, Junhua Avenue, Jinling Mansion, and Tianyu Garden were formed. In addition to bringing a new experience to the people, these projects have achieved remarkable results in some invisible corners. Data show that after the transformation, the ecological shoreline, permeable paving, sinking green space, and vegetation buffer band of the Houhe Park, the total annual runoff control rate is as high as 95%.

"According to the plan, the two areas of the Jade Belt and Yangming West Road have begun to be renovated. At that time, the environment of the high -speed rail new district will not only be as beautiful as the garden, but the inconvenience and distress brought to the people will be greatly reduced." Wang Chunchao said.

The jade belt reconstruction project mentioned by Wang Chunchao is mainly concentrated in the section of the Avenue of the Avenue to Shaoshan. The project includes water system rectification and cross -strait landscape green space. (TSS) higher than 60%.

The transformation of Yangming West Road combines roads, greening, and drainage projects, and uses biological retention facilities, penetration pools, permeable paving, and planting Caigou technical measures. "After the rainwater is filtered by the rolling filter, the heavy metal substance is removed by the unprooped rainwater treatment device. Some of the rainwater after purifying the treatment into the storage tank, and some overflow entering the municipal pipe network." Wang Chunchao said.

Such a setting can remove the rainwater in the central separation zone to reduce the pollution of runoff rainwater; the filtering pool set in the non -isolation zone is equipped with a three -dimensional turbine rainwater every 30 meters to play a role of overflowing rainwater Essence The arched storage device under the rainwater mouth mainly plays the role of muddy and sand to prevent the pipe network from blocking the pipe mesh. Extraordinary rainwater is discharged into the rainwater pipe network through the overflow.

Regional "Small Sponge" builds a city "big sponge"

Since entering the main flood season in the southern region, the construction of Ji'an sponge cities has ushered in a new round of big tests. On June 5th, Ji'an City changed the yellow warning signal of heavy rain: some places accumulated more than 50 mm, and the local area was accompanied by strong streaming weather such as short -term heavy precipitation and lightning.

Geological disasters such as urban and rural waterlogging caused by heavy rainfall seriously threaten the safety of the people. "When you reach this time, the more you need to discover what problems exist in the construction of the sponge city, and adjust it!" In the face of the pressure brought by the bad weather, Zhou Jinxi, deputy director of Ji'an Housing and Urban Construction Bureau, stared at the monitoring system and said that he said that he said that he said that he said that he said that he said that he said, he stared at the monitoring system. , "Go, go to the old city."

Different from the establishment of the water environment beautification system in the new district, park, and development zone, Ji'an Old Town is the key areas of the problem of waterlogging, rainwater collection and utilization, and black and odorous water governance in the construction of sponge cities. "Only by adhering to the problem -oriented -oriented is the truly practicing the theory of 'two mountains' theory, can we create a sponge city system that is‘ natural accumulation, natural penetration, and natural purification ’.” Zhou Jinxi said.

In 2016, Ji'an City was listed as a pilot of the construction of sponge cities in Jiangxi Province. In addition to the two documents of the "Opinions on Comprehensive Promoting the Construction of Sponge City" and "Implementation Plan for the Construction of Sponge City in the Central City", the setting in the leading group of the sponge city construction leadership group It can also be seen that Ji'an attaches great importance to the construction of sponge cities: the mayor is the team leader, the deputy mayor in charge is the deputy team leader, and the main leaders of the relevant municipal departments as members, and the office of the leadership group is located in the Housing and Urban Construction Bureau.

"So blindly worried that it does not exist." In Zhou Jinxi's view, after 6 years of pilot construction of sponge cities, Ji'an has accumulated a lot of experience. As of the end of 2021, Ji'an has been completed and reached the area of ​​sponge city construction requirements (drainage partition partitions (drainage partition partitions ) 35.28 square kilometers, exceeding the target requirements of 64.59 square kilometers of 64.59 square kilometers exceeding the current situation. "It is impossible to be nervous." Zhou Jinxi admitted that although the maintenance of flood prevention was continuously improved, during the main flood season, it was often "long duration, strong interval, and cumulative rainfall." A gradual and optimized process. Any risk that involves people's livelihood must be eliminated in time.

After learning that the flood prevention effect in the main region basically reached expectations, Zhou Jinxi's heart fell half. "Grasp the key points, the effect doubles." He said with emotion, "Houhe Disaster Prevention and Antive Park, Ji'an Inner River Governance Project, and Guhou River Third Phase Three Governance Projects. , To take into account typical cases. "

Relying on these "small sponge structures" in both natural and uniform areas, the city's "cavernous body" in Ji'an is quietly taking shape.

Control the rainwater runoff from the source

As the city of Ji'an, where the Chinese Revolution Cradle Insu Gangshan is located, the red spirit of promoting the first and well -working red spirit, when the concept of "sponge city" is proposed, it will boldly try it out shortly after. A series of infrastructure construction has been carried out.

In order to continue to promote the improvement of water ecology, water safety guarantee, and water environment improvement, the Ji'an Municipal Government proposed that from 2022-2024, it invested 10.883 billion yuan for the construction of 208 sponge city projects.

"It can be said that Ji'an has a wealth of experience in provincial sponge city construction demonstration experience." Li Yunhan, an engineer of Jiangxi Provincial Urban Planning Municipal Design and Research Institute Co., Ltd., said in an interview with China City Daily reporters, "Ji'an sponge city construction is based on the" source reduction at the source. The comprehensive coordination of the ideas of ranking, process control, system governance ', and comprehensive consideration from the source of community transformation, urban facilities construction, regional watershed landscapes, forests, and lake system construction, so as to achieve urban waterlogging control, runoff pollution control, rainwater collection and utilization, etc. Demand. "

Li Yunhan believes that in addition to emphasizing the source of emission reduction and green facilities, the construction of sponge cities should also be combined with "blue -green gray". That is, on the basis of making full use of the blue and green space, scientifically combined with gray measures such as drainage pipe networks, pumping stations, and storage ponds in order to solve the problem of heavy rain and waterlogging within the set defense standard.

In addition, Ji'an Central City has created a sponge city construction area with drainage partitions, especially the main river lane jade belt area. Its perfect rainwater leakage channels make rainfall in extreme weather no waterlogging.

In the face of a new round of flood season, how can Ji'an City build sponge cities with organic integration with traditional flood control and flood discharge? Li Yunhan said that according to factors such as natural geographical conditions, hydrological meteorological characteristics, and vertical planning of urban land use, relevant departments have chosen ecological measures and engineering measures. Drainage, thereby improving the level of urban waterlogging. "More importantly, the whole process of construction is controlled, and the facilities such as 'seepage, stagnation, storage, cleaning, cleaning, and ranking'."

Comprehensive Ji'an's main experience and highlights, Li Yunhan put forward suggestions on the construction of sponge cities in other cities. The source of emission reduction, increase rainwater adjustment space, ensure the leakage corridor, and build a high starting point planning and high standards to build flood prevention and waterlogging facilities.

Specifically, the first thing is to control the rainwater runoff from the source, which can not only reduce the amount of rainwater runoff, reduce its peak flow, but also extend the flow and emissions time, reduce the "step walking" effect of rainwater runoff, which is equivalent to increasing the disguise in disguise. The drainage capacity of the rainwater pipe network. In addition, "the storage of rivers and lakes, wetlands, and artificial construction can be further reduced to further reduce the peak flow of rainwater." Li Yunhan said.

■ Reporter of China City Daily: Wang Nanwen Li Yunhan Picture

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