Evaluating the Hydrological Performance of Permeable Pavements in Flood-Prone Urban Areas of Pakistan

Abstract

The field of Pavement Engineering has experienced the introduction of permeable pavements. Permeable pavements can effectively diminish runoff during heavy rain by facilitating water infiltration through the surface and into the groundwater table. These pavements can recharge groundwater while supporting moderate loads, thereby alleviating the negative impacts of heavy Rainfall during monsoon seasons, which can obstruct business activities, particularly in urban environments. Urban regions in Pakistan are becoming more susceptible to flooding, especially in low-lying areas where conventional impermeable pavements worsen the situation. This study examines the efficacy of permeable pavements as a sustainable approach to alleviate flooding in these regions. The structural and hydrological designs of permeable pavements, specifically pervious concrete, will be analyzed through a modeling approach utilizing 'Pervious Pave' software, by varying the void ratios and thickness of reservoir layers. Information concerning soil infiltration capacity, rainfall intensity, elevation profiles, and the duration necessary for complete water penetration will be employed for comprehensive laboratory analysis. The results indicate that permeable pavements significantly improve water infiltration into the soil, decreasing surface runoff and alleviating the pressure on traditional drainage systems. Through diverse analytical methods, the study illustrates that permeable pavements significantly reduce flooding by facilitating rainwater infiltration into the soil, thereby enhancing groundwater reserves and decreasing surface water buildup. This study offers significant insights for urban planners, engineers, and policymakers, presenting evidence-based recommendations for integrating permeable pavements in flood-prone urban regions of Pakistan. Adopting this environmentally conscious strategy allows urban areas to strengthen their defenses against flooding, foster sustainable water management practices, and cultivate more enjoyable living spaces for their inhabitants.