Porous asphalt is a type of pavement designed to allow water to pass through its surface. This permeability helps reduce surface runoff and minimizes flooding during heavy rain. The structure of porous asphalt includes larger aggregates and fewer fine materials, creating voids that facilitate drainage. This paving material is often used in parking lots, driveways, and roads where water management is essential. By allowing rainwater to seep into the ground, porous asphalt can help recharge groundwater supplies and reduce the need for stormwater management systems, making it an environmentally friendly choice for urban areas.