What is a pervious surface?

A pervious surface is defined as a type of surface that allows water to infiltrate through it, thereby facilitating the absorption of rainwater and reducing surface runoff. This characteristic is crucial in stormwater management as it helps to recharge groundwater, mitigate flooding, and decrease the amount of polluted stormwater that enters drainage systems and waterways. Pervious surfaces can include materials like permeable pavement, gravel, or grass, which are designed specifically to enable water to pass through them.

In contrast, other options describe different types of surfaces that do not facilitate water infiltration. Surfaces that are completely impermeable will lead to increased runoff, as the water cannot penetrate the surface. Additionally, decorative surfaces, while aesthetically appealing, do not necessarily provide functional benefits related to water absorption. Lastly, surfaces that are designed to channel water away quickly may exacerbate runoff issues rather than promote sustainable water management practices.