Wow!Our Qingcheng will "breathe"!

Sponge cities refer to good "elasticity" in the aspects of adapting to environmental changes and response to natural disasters like sponges. It absorbs water, water storage, water seepage, and water purification when it rains. And use it.

On July 9, 2021, Hohhot was selected as the first batch of sponge demonstration cities in the autonomous region. Recently, as the only shortlisted city in Inner Mongolia, Hohhot City was shortlisted for the "14th Five -Year Plan" nation's second batch of systematic global promotion of sponge city construction demonstration cities, which will receive financial support of 1.1 billion yuan in central finance.

The contradiction between the supply and demand of water resources is increasingly highlighting the poor drainage of urban pipe networks

Building a sponge city is imperative

Liu Ping, a resident of Yongtai City, Saihan District, clearly remembers the summer of 2015. "A rain in July of that year, the west gate of Yongtai City District became an ocean."

On July 29, 2015, Hohhot fell into heavy rain. For a while, multiple main roads in the urban area were flooded, and the wide roads became difficult to surpass the ocean. The traffic was on the verge of paralysis. Slowly walk through the water, and multiple drainage wells are constantly overflowing. It was not until about 20 o'clock that day that the traffic order in the urban area gradually recovered. According to data from the Hohhot Meteorological Bureau, the rainfall in the eastern part of the city was large, and the depth of rainwater was 30 to 40 cm, and local rainfall was obvious.

The sponge road paved with water transparent concrete can allow children to play.

Hohhot is one of the country's 40 severe water shortage cities and one of the 75 cities with severe groundwater pollution in the country. The annual average rainfall is only between 335-534 mm and concentrated in July and August. According to data, the city's total water resources are 118.77 million cubic meters, and the per capita water resources are 1/5 of the country. With the rapid development of Hohhot's economy and society and the gathering of population in the process of urbanization, the contradiction between supply and demand of water resources is increasingly prominent, and the task of urban drainage and waterlogging prevention is also more and more heavier. Therefore, it is imperative to build Hohhot City into a sponge city.

In fact, heavy rain caused the urban waterlogging more than this time. On July 10, 2012, the city had fallen into rain and hail. The rainfall within an hour exceeded 20 mm, which led to the severe accumulation of water in many sections in the urban area, the road traffic was blocked, and the municipal transportation system was paralyzed.

On August 7 of the same year, the rainstorm led to a large area of ​​the Gong Railway Bridge in Hohhot. The Danfei Road Interchange Bridge did not repair the drainage pumping station due to the repair of the bridge, and the water accumulation was more serious.

Regarding the reasons why in the urban area of ​​Hohhot City in the past few years, Li Ying, an associate researcher at the Institute of Economics of the Institute of Social Sciences, believes that at that time, the green space lacked governance, it was generally higher than the ground, and the rain was difficult to flow in, and natural precipitation could not be effectively used. Secondly, the construction of heavy projects ignored the scientific use of the functions of infiltration, storage, and net functions of the natural ecosystem. The third is the lack of unified technical regulations and effective management and acceptance mechanisms. In addition, the drainage capacity of the drainage pipe network at that time was not strong.

Genghis Khan Park adapts to local conditions to improve the function of green land seepage water storage.

It is understood that the pipelines in Hohhot are mostly paved in the 1970s and 1980s. The design and construction standards of the pipeline are low, the pipes are fine, and the carrying capacity is small. Many pipes are seriously corrosive. Some pipelines are close to the limit of service life and urgently need to be updated. And many pipelines have not been fully connected, and some roads have not been paved with drainage pipelines, causing incomplete flow of urban pipeline networks.

According to the meteorological department, with the continuous development of the urban area, the density of the space has continued to shrink, the high -rise buildings, and the exhaust emissions of the automobiles have caused the ground thermal airflow to continue to collide with the air conditioner in the air. At the same time, at that time, the city's asphalt roads and cement road surfaces were poorly infiltrated, the ability to absorb heat, and the green space of the main urban area was limited. In addition, the drainage of the tube network pipeline was drained. A large area of ​​waterlogging in a short period of time.

"Seeping, stagnation, storage, cleaning, use, and exclusive"

From "end governance" to "source governance"

Cracking the lack of water and waterlogging, creating a "sponge city" provides a new idea of ​​wisdom water treatment from "end governance" to "source governance" for Hohhot.

In 2015, the General Office of the State Council issued the "Guiding Opinions on Promoting the Construction of Sponge City". In 2016, in response to the call of the Ministry of Construction, the Inner Mongolia Autonomous Region issued the "Promoting Opinions of the" Promoting the "Sponge City" construction ", and also gave the timetable for the construction of the" sponge city "in the district: by the end of October 2017, the establishment of the" sponge of the sponge The city's "special planning draft; by the end of 2017, the" sponge city "construction plan and three -year rolling construction plan were completed; by 2020, the area of ​​more than 20%of the urban construction zone will meet the target requirements, and 70%of the rainfall eliminates the place and eliminates the local rainfall and eliminates the local rainfall. Utilize, the construction concept of "sponge city" with natural accumulation, natural penetration, and natural purification runs through the construction of urban planning, and ecological space such as urban rivers and lakes and mountains and forest fields will be effectively protected. The area of ​​the target meets the target requirements, and the qualified flag counties carry out the "sponge city" construction work.

The rainwater garden landscape in Yazu Garden.

The focus of the construction of sponge cities is the construction of sponge city roads and sponge cities.

In the Hohhot Prairie Silk Road Cultural Theme Park, the colorful pavement of yellow and blue is particularly eye -catching. This permeable road surface is one of the important signs of the construction of sponge cities.

"The construction of sponge cities makes cities more livable. Even after the heavy rain, we walk in the Silk Road Park, and the shoes will not be wet!" Wei Lihua, a citizen who was playing with his grandson, was lamented. Colorful sidewalks on both sides of Xinhua Street, colorful squares of the grassland Silk Road Cultural Theme Park, and colorful walking roads on the street ... This kind of sponge road that uses water -transparent cement and gravel, more and more appears in the capital Each corner.

According to An Xiaojun, a staff member of the Municipal Housing and Urban Construction Bureau of Housing and Urban Construction, the water transmitting concrete paving adopted by the sponge road can reduce the runoff of the surface of the natural water body directly into the natural water body, which can reduce the burden on urban drainage facilities, reduce the water body body Pollution. It can quickly infiltrate the underground, restore groundwater, and keep the soil humidity. Prevent large -scale water accumulation on pavement, do not reflect at night, and increase the safety and comfort of people's travel. At the same time, the temperature and humidity of the urban space are adjusted, the urban thermal circulation is improved, and the heat island effect is relieved.

In pocket parks, water -saving green space landscapes are everywhere.

In order to accelerate the renewal and transformation of the underground pipeline network, when Hohhot was building a "sponge city", it was not pushing down and replacing the traditional drainage system. Instead, the traditional drainage system was "reduced" For measures such as use, ranking ", and other measures, formulate construction underground pipe networks and green space plans to maximize the impact of urban development and construction on the ecological environment.

For the highway hardening index is too high, the drainage pipes are too small, the drainage speed is too slow, some road slopes are too large, the drainage pipelines are not smooth, and the drainage pipelines are too small. The drainage system has gradually replaced the traditional direct buried pipe network and other gray facilities. The total investment of 975 million yuan and a total length of 4.74 kilometers started construction in May 2014 and completed in early August 2016. According to the plan, the construction length of the Urban Underground Comprehensive Pipe Corridor in Hohhot will reach 264.04 kilometers by 2030.

Through the transformation, the capital citizen's travel experience has been greatly improved. Citizen Mr. Liu said that many sections of the capital have renovated underground pipe network transformations. After the renovation section encountered heavy rain, the water no longer accumulated water, and the rainy days were as smooth as driving.

Advanced concept of integrating urban construction

The construction of sponge cities makes cities more quality

"In the past few years, people were intercepted at both ends of the bridge when they encountered heavy rain, especially the north exit of Jinqiao, and the water accumulated was serious. In recent years, this phenomenon has become less and less. On the one hand The drainage pipeline network; on the other hand, it is related to the surrounding trees and increased green space. "Ms. Guo, who lives in the Jinqiao Development Zone, said.

The continuous advancement of sponge cities has enhanced the happiness index of citizens.

The urban "sponge body" includes both water, lakes, ponds, wetlands and other water systems, as well as urban supporting facilities such as green space, gardens, and penetrating the road surface. Some runoffs over pipe networks and pumping stations can effectively improve the standards of urban drainage and alleviate the pressure of urban waterlogging.

In recent years, the garden department of our city has continuously added "sponge body" to repair and build a certain scale sponge body through comprehensive use of physics, biology and ecology, so that urban buildings, communities, roads, green spaces, and squares will become the construction of sponge cities. Carrier.

Located in Genghis Khan Park, which is located in Xincheng District, flowers are clustered, green trees, and canyons are dangerous and turbulent green ponds. Many citizens are here every day. As a pilot pilot of a sponge park, Genghis Khan Park adopts local conditions, and some of the tree caves in the inner mountain body have become fish -scale points. The park has grown a large number of local plants to form a multi -level plant structure, which can stay and penetrate more rainwater. In adjacent green space, it is convenient for rainwater to enter the green space; the road surface of the lake is replaced with water transmitted concrete road surface, and rainwater can directly penetrate the soil to supplement water. The total area of ​​Genghis Khan Park covers an area of ​​560,000 square meters, of which 470,500 square meters that can eliminate rainwater. According to normal rainwater seepage, the park can eliminate at least 59,000 cubic meters of rainwater and 105 mm of penetration rainwater. According to the annual runoff control rate of 85%of the Hohhot designed rainfall 22 mm standard, Genghis Khan Park exceeded the standard nearly 5 times.

While vigorously promoting the construction of sponge parks and green spaces, the garden department continues to fully consider rainwater seepage and utilization function from the planning and design level, and set up rainwater storage facilities according to local conditions. Ditch and other methods pay attention to the ecological and structure of plant selection, forming a plant community that is rationally configured by a multi -layered and reasonable configuration of Joe, irrigation, and land, thereby improving the retention and exodious effects of green land on rainwater, enhancing the park and the green space system The "sponge" function of the city allows Hohhot to breathe freely like a sponge.

Nanhu Wetland Park is located in a low outerity. It is a natural water source. As a urban ecological park with the characteristics of sponge cities, the garden department can realize the concept of restoring the wetland ecosystem chain and adhering to the sustainable development. Water circulation effectively exerts the role of sponge and makes it truly a natural "green lung" that purifies air.

At the Yazuyuan Pocket Park at the intersection of Zilechuan Street and East Second Ring Road, rainwater garden landscapes and water -intensive white sand embellished flowers are the most attractive. The rainwater garden means to store all the stagnant water around the surroundings after the rain, just like a sponge, suck the water in, and then storage, water seepage, and water purification. Essence By integrating the concept of sponge cities and the latest technologies, measures such as water -transmitting pavement, water -saving plant materials, three -dimensional greening, and rainwater collection are used to achieve rainwater and stagnation of rainwater in the surrounding areas. In the "Pocket Park" built one after another, this type of water -saving greenland landscape can be seen everywhere.

In 2021, the Municipal Garden Construction Service Center built a rainwater garden when the landscape improvement and transformation of the green space east of the Petrochemical Bridge along the Dahei River, and the garden was built into the sponge city. The stone simulation of the large black river system is implanted with landscape elements such as ornamental grass, dead wood and other landscape elements to shape the sponge body to form a rainwater garden landscape, which reflects the characteristics of the landscape function of ecological conservation gardens.

This year, our city will build 10 sponge road demonstration streets and 8 sponge transformation demonstration communities.

Reporter's note:

"Sponge City" is coming, which not only has a profound impact on the ecological development of the capital, but also can bring real benefits to the lives of the citizens of the capital. The living environment is improved, the safety of drinking water is guaranteed, and travel is more secure and convenient ... With the continuous advancement of the construction of sponge cities in Hohhot, cities will be more livable, and citizens' happiness index will be improved.

Source: Hohhot Daily reporter Yang Caixia

Coordinated/Huo Wenrui School Reading/Huo Wenrui preliminary review/Zhang Yi's Zhang Yao finally review/Zhao Min

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