Assessing the Effectiveness of Permeable Pavements in Mitigating Flooding in Low Lying Zones in Urban Areas of Pakistan

Abstract

Pavement Engineering has seen a penetration of the concept of permeable pavements. Permeable pavements have the capability to reduce the runoff from intense rainfalls by allowing the water to penetrate the pavement and subsequently enter the ground water table. In this way, these pavements can recharge the ground water while sustaining moderate loads, hence mitigating the adverse effects of intense rainfalls in monsoon seasons which contribute in the hindrance of business activities especially in urban areas. Urban areas in Pakistan are increasingly vulnerable to flooding, particularly in low-lying zones where traditional impermeable pavements exacerbate the problem. This study investigates the effectiveness of permeable pavements as a sustainable solution to mitigate flooding in these areas. By changing the void ratios and thickness of reservoir layers, structural and hydrological designs of permeable pavements particularly the pervious concrete, will be analyzed through modeling approach using ‘Pervious Pave’ software. Data relating to soil infiltration capacity, rainfall intensity, elevation profiles and time required to allow the water to completely penetrate, will be utilized for thorough laboratory testing. The findings reveal that permeable pavements significantly enhance water infiltration into the ground, reducing surface runoff and lessening the burden on conventional drainage systems. Through various types of analysis, the study demonstrates that permeable pavements effectively mitigate flooding by allowing rainwater to percolate into the soil, thus replenishing groundwater resources and minimizing surface water accumulation. This study contributes valuable insights for urban planners, engineers, and policymakers, providing evidence-based recommendations to incorporate permeable pavements in flood-prone urban areas of Pakistan. By embracing this eco-friendly approach, cities can enhance their resilience against flooding, promote sustainable water management, and create more livable environments for their residents.