How can permeable surfaces in parking lots help reduce stormwater runoff?

• A. By preventing any water from reaching the ground
• B. By allowing rainwater to infiltrate through the surface, thereby reducing the volume of runoff
• C. By directing water into storm drains
• D. By storing water for later use

Answer: (B)

Permeable surfaces in parking lots play a crucial role in managing stormwater runoff by allowing rainwater to infiltrate through the surface. This characteristic enables water to pass through the pavement and into the underlying soil or gravel layers, significantly reducing the volume of surface runoff that typically occurs after rainfall. As rainwater infiltrates, it is absorbed by the ground, which not only lowers the amount of water that would otherwise flow into drainage systems but also helps recharge groundwater supplies.

This infiltration process minimizes issues related to stormwater runoff, such as flooding and water pollution, as less water is directed into streams and rivers and more is utilized by the ecosystem. By effectively allowing rainwater to penetrate rather than pooling on the surface, permeable surfaces contribute to a more sustainable and environmentally friendly approach to managing stormwater in urban areas.