New progress has been made in the construction of Xiamen Sponge City. Yesterday, the reporter learned from the Municipal Municipal Garden Bureau that the reconstruction project of the sponge city of Haicang Xianglu Primary School was completed. In January this year, Xiamen was identified as the first batch of national sponge cities pilot cities. Then Haicang Majiu Bay and Xiang'an New City were identified as pilot areas for the construction of Xiamen's sponge city. This is the first fully completed project in Xiamen since the construction of the sponge city.
Correspondent Xie Yiqiang, correspondent of our reporter Guo Yufen
Laying 850 square meters of permeable bricks
Xianglu Primary School is located in the Majiu Bay area of Haicang. When he arrived at the scene, Haicang had just had a rain, but the red permeable bricks were covered, but there was no water on the ground. A total of 850 square meters of permeable bricks were laid on the campus. Below them, there is a layer of gravel that can be used to store rainwater. And this rainwater will be gradually discharged into the drainage ditch and other equipment through the pipeline.
With 8 rain gardens
In addition to permeable bricks, there are also 8 "sedimental" rain gardens in Xianglu Primary School. It is either a simple purifier or a temporary water storage tank. Rainwater and runoff flow into the garden along the terrain, and its soil has also been transformed. The purpose is to initially purify rainwater and absorb some pollutants such as rainwater and runoff. The preliminary purified rainwater will enter the various layers of structures such as the gravel layer under the rainwater garden, be stored, and eventually be sent to the storage tank.
"Sedimentary" parking lot can seep
The reconstruction of the sponge city is a systematic project, which includes a series of equipment such as purification tree ponds, water storage buckets, gravel trenches, and bioretention zones. It is worth noting that there is also a seepage parking lot. Unlike ordinary parking lots, it is "sedimental" and paved with permeable bricks. Rainwater and runoff will flow directly into the permeable bricks. In Xianglu Elementary School, there is a total of 700 square meters of seepage parking lot. The collected rainwater and runoff will be piped into the planting ditch after that.
In addition, Xianglu Elementary School also has 11 purification tree ponds, more than 400 square meters of recessed oasis, 8 sand filter purification equipment and so on. Through the system equipment, the total annual runoff control rate of Xianglu Elementary School can reach 70%. Together, rainwater is collected, purified, stored and recycled to the maximum extent.
Sponge city means that the city can be like a sponge and has good "elasticity" in adapting to environmental changes and responding to natural disasters. It absorbs, stores, seeps, and clears water when it rains, and "releases" stored water when it is needed And use it. Regarding citizens, the most intuitive change that Sponge City will bring is that the danger of heavy rain is less.
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