An optimal ground material for permeable landscape roads in garden landscapes and sponge city construction, it is a new paving method that combines artistry, aesthetics, and functionality. It infuses urban pavements with art and vitality while allowing rainwater to seep into the ground, effectively eliminating surface water accumulation. It is a decorative ground material that "breathes."

Sponge City — Retain

Harvest rainwater by respecting the natural terrain and topography, allowing rainfall to disperse naturally. With the artificial construction that has disrupted natural terrain and topography, water accumulates in one place quickly, leading to internal flooding. Therefore, rainwater should be stored to achieve regulation and peak-shifting. Currently, there are no fixed standards or requirements for the water storage phase in sponge cities, with diverse underground storage styles. The most common forms are plastic module storage and underground water reservoirs.

Sponge City --- Retard

Its primary function is to delay the runoff of rainwater formed in a short period. For instance, by adjusting the micro-topography, it allows rainwater to slowly accumulate in one place, trading time for space. Through "retention," it can delay the peak formation of runoff. The specific forms can be summarized into three: rainwater gardens, ecological retention ponds, infiltration ponds, and artificial wetlands.

Sponge City — Pure

Through soil infiltration and via vegetation, green systems, water bodies, etc., water quality can be purified. Therefore, it should be collected, treated for purification, and then reused in the city. Rainwater purification systems are set up with different purification methods based on regional environments, which can generally be categorized into three types: residential area rainwater collection and purification, industrial area rainwater collection and purification, and municipal public area rainwater collection and purification. Different rainwater purification stages can be set according to these three regional environments, with the currently familiar purification process consisting of three stages: soil filtration purification, artificial wetland purification, and biological treatment.

Sponge City---Utilizing

Rainwater, after undergoing soil filtration, artificial wetland purification, and multi-layer biological treatment, should be utilized as much as possible, regardless of whether in water-rich or water-scarce areas. Strengthening the use of rainwater resources is crucial. Not only can it alleviate flood disasters, but the collected water resources can also be utilized, such as using it for car washing after collecting and purifying rainwater from parking lots. We should nurture water through infiltration, retain it on-site through storage, and then use it on-site through purification.

Honeycomb city — Drainage

By integrating vertical urban structures with engineering facilities, combining drainage and flood prevention systems with natural waterways, and merging surface drainage with underground stormwater channels, general emissions and excess rainfall are achieved, thereby avoiding internal flooding and other disasters. Some cities experience internal flooding due to excessive rainfall. This necessitates the implementation of artificial measures to discharge the rainwater.