Traditional methods for addressing urban waterlogging typically focus on draining rainwater as much, as quickly, and as smoothly as possible. This "rapid drainage" approach, however, does not consider the recycling of rainwater and cannot fundamentally solve the issue of urban waterlogging. But in recent years, with the application of eco-permeable concrete, the construction of "sponge cities" has become increasingly successful.
Under normal climatic conditions, "sponge cities" constructed with permeable concrete as the paving material can retain over 80% of rainwater. "Sponge cities" built with ecological permeable concreteMaintaining the total and peak flow rates, the timing of the peak runoff is also largely unchanged under the effects of infiltration, regulation, and storage. Stability of hydrological characteristics can be achieved through source reduction, process control, and terminal treatment.
One-way drainage. Primarily enhances water permeability, reduces the impact of excessive surface runoff and accumulation of road rainwater, and achieves the purpose of groundwater replenishment and soil purification. Generally, this is achieved by improving road materials and implementing measures such as rainwater diversion.
Harvest rainwater efficiently and utilize it in various ways to mitigate the impact of internal flooding and reduce water wastage.
Three retention measures. Primarily controlling the runoff of rainwater within a short time frame, reducing the impact of urban flooding and delaying peak runoff. By means of micro-topographical adjustments, rainwater is collected to a unified location, and its influence on runoff is mitigated through different temporal and spatial transformations, ensuring normal operation within the city.
Four cleans. Reasonably utilize the existing green land system to purify rainwater and reuse it in related fields. This increases water resource utilization while preventing the occurrence of pollution issues.
Five rows. For areas with abundant precipitation, a reasonable drainage system can be set up to effectively manage rainwater resources, alleviating urban waterlogging issues and achieving the goal of improving the city's ecological water system.
