# Research on Ecological Lawn Regulation and Storage System in Flight Area Based on Sponge Airport
## 5 Conclusions  
Reference [2] applied the concept of the sponge city to airports, combined with low-impact development facilities, to simulate the addition of permeable paving facilities. The proportion of pipe overload after the use of permeable paving facilities was 13-76% lower than that of nodes without permeable paving facilities, and the overload ratio of pipe segments decreased by 15.99-85%, indicating that the method can effectively control the internal flooding of the airport caused by node overload and pipe segment overload. Reference [30] adopted LID facilities for the design of sponge airports. After the construction of LID facilities, the maximum reduction in total runoff volume was 74%; the accumulation time was delayed by up to 16 min; the number of overflow nodes in the airport flight area decreased by 13.1; and the number of overloaded pipe segments decreased by 20.4%. Reference [38], taking the sponge system of Daxing Airport as an \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{
\begin{tabular}{c} **Rainfall** \\ **Reappearing** \\ **Period (a)** \\ \end{tabular} } & \multicolumn{2}{c}{**Ponding Duration (min)**} & \multicolumn{2}{c}{**Total Ponding Volume (m\({}^{3}\))**} \\ \cline{2-5}  & **Traditional** & **Ecological Lawn** & **Traditional** & **Ecological Lawn** \\  & **Airport Flight** & **Regulation and** & **Airport Flight** & **Regulation and** \\  & **Area Lawn** & **Storage System** & **Area Lawn** & **Storage System** \\ \hline
5 & 17.4 & 2.88 & 5890 & 1494 \\
10 & 27.6 & 3.3 & 19,411 & 6578 \\
20 & 36 & 5.1 & 41,757 & 14,905 \\
30 & 40.8 & 6.18 & 57,708 & 20,691 \\
50 & 45.6 & 7.8 & 80,572 & 29,014 \\
100 & 52.2 & 9.6 & 115,568 & 42,625 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Comparison of simulated waterlogging with different return periods. Figure 6: Comparison of simulated pollution discharge amounts with different return periods. example, established a stormwater management model (SWMM) based on rainfall runoff data to simulate the hydrological process under different combinations of sponge facilities. The total control rate of rainwater reached 79%, and the reduction rate of the overflow volume reached 10.6%, showing obvious effects on peak cutting and peak delay. This paper utilizes the large area of lawn around the traditional airport flight area in combination with gray facilities to construct an ecological lawn detention system. During light rain, by planting fine-rooted lawns, the surface runoff resistance is first increased, and the surface runoff is reduced. Then, by setting up detention channels, a physical separation is made between the pavement and the large area of lawn, discharging surface runoff from the rapid runway. The top of the detention channel is equipped with a filter net to reduce the pollution of the initial runoff of rainwater. The inside of the detention channel is composed of permeable bricks and water level sensors, which are used to capture the water level changes inside the detention channel and provide feedback to the intelligent terminal, and after the rain, the retained rainwater is slowly released to the surroundings for a long time through the permeability of the permeable bricks. During moderate rain, the water level sensor in the detention channel transmits the rate of water level rise to the intelligent terminal in real time. When the rate of water level rise is too fast, the intelligent terminal opens the intelligent valve to discharge rainwater into the water storage module through the overflow pipe. The water storage module also stores surface runoff, and it is set in an underground area beneath a concave ground surface, with coarse sand and large stones on top to reduce the phenomena of clogging and weed growth in traditional grass ditches. After the rain, the rainwater in the water storage module is purified and reused for lawn irrigation.