How do permeable pavements contribute to environmental sustainability?

Permeable pavements contribute to environmental sustainability by reducing stormwater runoff and improving water quality. Unlike traditional pavements that are impermeable and prevent water from infiltrating into the ground, permeable pavements allow rainwater to flow through the pavement surface and into an underlying storage layer. This reduces the volume of stormwater runoff that enters storm sewers and waterways, mitigating flooding and erosion. As the water infiltrates through the pavement, it is filtered, removing pollutants such as sediment, oil, and heavy metals. This improves water quality and helps to protect aquatic ecosystems. Permeable pavements also help to recharge groundwater aquifers, which are an important source of drinking water. By reducing stormwater runoff and improving water quality, permeable pavements help to protect water resources and promote a more sustainable urban environment. Additionally, they can reduce the urban heat island effect by allowing for evaporative cooling, and in some cases, they can reduce the need for traditional stormwater management infrastructure, such as detention ponds.