Visiting the rain water garden found that the ground of the garden was about half a meter lower than the ground in the community, and its shape was similar to a small pond. Various types of aquatic plants are planted on one side of the garden. Although the rain is heavy, there is no stagnant water in the rain garden. This is because the rain either entered the ground through natural infiltration, or entered the drainage network of the community through an overflow well beside the garden, and finally merged into the drainage pipe network. Municipal pipe network.
"Sponge city has several principles, namely infiltration, stagnation, storage, cleanliness, use, and drainage (the advantages of ecological ceramic permeable bricks ). This rainwater garden embodies the above guidelines." When the rain is particularly heavy, it is passed The rainwater garden stores rainwater for a short period of time, then infiltrates or flows into the overflow well. This process slows down the rate of rainwater entering the municipal pipe network, and then reduces the drainage pressure of the municipal pipe network during heavy rainfall. At the same time, rainwater has become the livelihood water of aquatic plants cultivated in the garden.
In order to verify the drainage ability of the transformed sponge facility, a pot of water was borrowed from the residents' homes and poured directly on the ecological ceramic permeable bricks in the walkway in the community: I saw that the water did not flow to both sides of the walkway, but directly infiltrated the ground. After a basin of water is splashed, only some watermarks are left on the appearance of the trail, and the shoes are not slippery when stepping on it
Ecological ceramic permeable bricks are made of larger particles. There is empty space in the center. Under the permeable bricks , there are gravel layers, sand layers and pre-buried seepage pipes. Rainwater can quickly infiltrate through the gravel and sand layers. Filtration objectively also plays a purification role.
The reconstruction of the sponge city does not have the large-scale construction scenes commonly found in ordinary urban construction, but instead it is refined construction.