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<p>Rapid urbanization and increasing extreme rainfall events have intensified urban waterlogging problems. Permeable pavement has been widely recognized as an effective measure for mitigating urban stormwater runoff. In this study, a laboratory rainfall simulation system was developed to investigate the hydrological effects of different permeable pavement structures. Artificial rainfall scenarios were designed based on local rainfall characteristics to reproduce typical storm conditions. Runoff and infiltration experiments were conducted on pervious concrete, permeable plastic, and a double-layer permeable pavement structure. The results show that the runoff generation of the double-layer pavement was significantly delayed compared with that of the single-layer pavement due to its larger pore structure and increased water storage capacity. The single-layer permeable pavement entered the stable infiltration stage earlier and exhibited lower stable infiltration rates. In addition, the double-layer pavement demonstrated stronger runoff control under sufficient water supply conditions. The maximum runoff coefficient of the single-layer pavement ranged from 0.47 to 0.48, whereas that of the double-layer pavement was only 0.30. Overall, the double-layer permeable pavement showed better performance in reducing total runoff, decreasing peak runoff, and delaying runoff generation. These findings provide useful insights for the design and application of permeable pavement in urban stormwater management and sponge city construction.</p>

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Hydrological Effects Assessment of Double-Layer Permeable Pavement by Physical Experimental Basis

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Pingping Luo,
  • Yubin Zhang,
  • Shiwen Zhu,
  • Yixuan Zhang,
  • Madhab Rijal,
  • Peiyao Yan,
  • Maochuan Hu

摘要

Rapid urbanization and increasing extreme rainfall events have intensified urban waterlogging problems. Permeable pavement has been widely recognized as an effective measure for mitigating urban stormwater runoff. In this study, a laboratory rainfall simulation system was developed to investigate the hydrological effects of different permeable pavement structures. Artificial rainfall scenarios were designed based on local rainfall characteristics to reproduce typical storm conditions. Runoff and infiltration experiments were conducted on pervious concrete, permeable plastic, and a double-layer permeable pavement structure. The results show that the runoff generation of the double-layer pavement was significantly delayed compared with that of the single-layer pavement due to its larger pore structure and increased water storage capacity. The single-layer permeable pavement entered the stable infiltration stage earlier and exhibited lower stable infiltration rates. In addition, the double-layer pavement demonstrated stronger runoff control under sufficient water supply conditions. The maximum runoff coefficient of the single-layer pavement ranged from 0.47 to 0.48, whereas that of the double-layer pavement was only 0.30. Overall, the double-layer permeable pavement showed better performance in reducing total runoff, decreasing peak runoff, and delaying runoff generation. These findings provide useful insights for the design and application of permeable pavement in urban stormwater management and sponge city construction.