Beijing: 5237 "Big Sponge" to help the city keep the water in the sky

The Xiuchi of the North District of Shougang has the function of rainwater adjustment.

Greening operators are taking water in a rainwater in the park.

This weekend, Beijing ushered in a round of heavy rainfall. Beijing is a city that is short of water. If rainwater can be collected and used in the flood season, it will be greatly helpful for solving urban water shortage and flood prevention and drainage, and the construction of sponge cities can play this role.

The reporter learned from the Beijing Municipal Water Affairs Bureau that as of the end of 2021, the construction of sponge cities in the construction area of ​​the city accounted for nearly 30 %. Generally speaking, the city's sponge city construction has basically achieved the expected goal, and the overall effect is good. As of now, the city has built a total of 5,237 sponge projects, and key projects can achieve 85%of rainfall.

"Sponge" ingenuity is hidden in industrial relics

After the Beijing Winter Olympics, the iconic buildings such as skiing platforms have attracted many people to come, but in addition to the Winter Olympics element, this industrial relics are actually hidden in the "sponge" ingenuity everywhere. In the flood season, large and small "sponges" will give full play to the role of "water absorption" and maximize the recycling of rainwater resources.

Xu Ming, deputy director of the Municipal Infrastructure Department of Shougang Construction Investment Co., Ltd., introduced that Qunming Lake, the North District of Shougangyuan, was actually an industrial drying pool. Before the movement of Shougang, the hot water generated during the smelting process was cooling here and then circulating. use. Now, Qunming Lake is not only a natural landscape, but also the largest rainwater turtle in the Steel Garden. The water area of ​​Qunming Lake is about 150,000 square meters. At present, the water depth is about 3.9 meters. Like a large water basin, it "connects" the rain in the flood season and allows the rain to store it. In addition to the lake body itself, rainwater pipes are also laid around the Qunming Lake, so that rainwater on the surrounding roads can also be discharged into Qunming Lake through the rainwater and pipelines.

Like Qunming Lake, Xiuchi is the original industrial drying pool, but the area of ​​the water is a lot smaller, only about 30,000 square meters, and the water depth is only about 1 meter. "The original water depth of Xiuchi was also 4 meters, but we tried to build a parking lot at the bottom of the lake, so now the water depth is shallow." Xu Ming told reporters that the geographical location of Xiuchi is higher than the Qunming Lake. You can flow into Qunming Lake along the show. "The water storage capacity of these two lakes constitutes the most important part of the construction of the Sugga Garden sponge, which can" absorb about one -third of the rain in the north of the Sugga Garden. "

In addition to the two large "water basins", the North District of Shougangyuan also built more than 30 storage ponds in accordance with the requirements of "equipped with a capacity of 500 cubic meters per square meter with a capacity of 500 cubic meters of rainwater". "Sponge" absorbs rainwater in other areas in the park. On a green space in the northeast corner of the north of Shougangyuan, a black "pipe" higher than the ground is the entrance to one of the storage ponds. During an interview with the reporter, a green car in a park was taking water here. I saw the staff first open a manhole cover above the turtle pool, connect the water belt on the car to the manhole, and then open the valve along the operation room of the storage pool into the operation room. The water belt entered the car.

"The road near the Tenth Winter Olympics Plaza of Shougang Garden is permeable asphalt, which is made of aggregate after some original buildings demolished. The northern district also laid a large number of water -transmitted bricks, all for the sake and collection of rainwater. At the same time, the concave green space everywhere in the park also plays a similar role.

In the past, the "stinky puddle" was now the rainwater adjustment pond

This summer, the Longtan West Lake Tune Project located in the second and southeast is being tested in the first flood season. In the past, the "smelly water pit" that had a smell overflowing during the flood season is not only smelly, but also has the function of regulating rainwater when the lake water circulation is self -cleaning.

According to reports, Longtan West Lake Reserve Project has a new storage tank at the bottom of Longtan West Lake, with a total volume of 90,000 cubic meters and an effective volume of 62,000 cubic meters. The inside of the storage tank is treated with the water quality of the water -sand hive storage and purification system, which can reach the surface water category.

The reporter learned that the main features of the silicon sand honeycomb and purification system are "water storage and purification of the same body". It consists of three parts: grille pool, silicon sand honeycomb filter and silicon sand honeycomb water storage pool. After the above three pools, Han Yizi completed the purification process, and then drained into the lake with drainage pumps. Among them, the grille pool is mainly to remove large floating objects such as dead branches. The efficient filter of the silicon sand hive uses silicon sand micron -level pores to remove suspended particulate matter. The silicon sand honeycomb water storage pool mainly removes water -soluble pollutants through biological effects.

During the flood season, the rainwater of the combined stream first entered the silicon sand honeycomb to adjust the purification system through the water -proof ditch in the northwest corner of the Longtan West Lake. During the non -flood season, the lake in a static state flows into the silicon sand hive at the bottom of the lake into the silicon sand honeycomb and the purification system. After purifying for one day, it is drained into Longtan West Lake with a drainage pump. This cycle is purified according to the 15 -day cycle.

According to statistics, in the flood season of 2022, the Longtan West Lake Reserve Project was storage 4 times, and a total of 140,000 cubic meters of rainwater was collected, which effectively relieved the surrounding rainfall and sewage directly into the lake pollution.

The city will also increase more than 30 square kilometers sponge cities

In recent years, in order to accelerate the construction of sponge cities, the city has continuously improved the system and mechanism of sponge cities, established a city and district -level organizational guarantee system, and incorporated the construction of sponge cities into relevant laws and regulations. , Continuously improve the supporting policies and long -term guarantee mechanisms. Wang Zhidan, deputy director of the Sponge Department of the Beijing Municipal Water Affairs Bureau, introduced that in the process of actual development and construction, the Winter Olympics, Daxing International Airport, Future Science City, Huairou Science City, Yizhuang Development Zone, Wenyuhe Park, Urban Deputy Central Executive Office, Millennium Millennium The construction of a large number of key areas and key projects such as Watching Forest, City Green Heart, Universal Studios, etc., comprehensively comply with the concept of sponge city, plan, design and build in accordance with the capital standards and Beijing characteristics, and achieve 85%of rainfall. use. As of the end of 2021, the construction area of ​​sponge cities in the city's built -up area reached 367.32 square kilometers, accounting for 26.56%of the construction zone. Generally speaking, the city's sponge city construction has basically achieved the expected goal, and the overall effect is good.

Through on -site surveys, as of now, there are 5,237 sponge projects in the city. Among them, the water paving area is 39.73 million square meters, the lower green space area is 54.63 million square meters, and the volume of rainwater storage facilities is 3.31 million cubic meters.

According to Wang Zhidan, in 2022, the proportion of the sponge cities in the core area of ​​the capital (Dongcheng and Xicheng) of the capital function is 30%, and the proportion of the urban sub -center (Tongzhou) has a ratio of 35%. The increase in the bidding area is 35.81 square kilometers. In the next step, the city will continue to promote the construction of sponge cities in accordance with the requirements of systematization, refinement, intelligence, and quality. (Source: Beijing Daily)

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