What aspect of landscape architecture helps in mitigating stormwater runoff?

Creating permeable pavements is a vital aspect of landscape architecture that plays a significant role in mitigating stormwater runoff. Permeable pavements are designed to allow water to infiltrate through the surface material and into the underlying soil, which helps to recharge groundwater and reduces the volume of surface runoff. This is particularly important in urban areas, where increased impervious surfaces—such as conventional asphalt or concrete—can lead to higher amounts of runoff, contributing to flooding and water quality issues.

The design of permeable pavements often incorporates materials that promote filtration and drainage while still providing a stable surface for pedestrian or vehicular traffic. By improving the management of stormwater, permeable pavements can help reduce the risk of erosion, lower pollutant levels entering waterways, and decrease the burden on storm drainage systems.

In contrast, options like installing extensive parking lots or expanding roof areas contribute to impervious surfaces, which exacerbate stormwater runoff. Planting grass alone, while beneficial for the environment, may not significantly address runoff issues unless integrated with other methods that promote infiltration and water management.