How does green infrastructure affect runoff in urban areas?

Green infrastructure is designed to mimic natural processes and manage stormwater in ways that enhance the urban environment. When implemented, it effectively reduces runoff in urban areas by promoting the absorption and infiltration of rainwater into the ground.

Through elements such as green roofs, permeable pavements, rain gardens, and bioswales, green infrastructure allows water to be retained and managed on-site. This not only decreases the volume of water that drains directly into stormwater systems but also mitigates the impact of heavy rain events, reduces the risk of flooding, and improves water quality by filtering pollutants.

The processes involved in green infrastructure—such as soil absorption, vegetation uptake, and evaporation—contribute to a more sustainable management of stormwater. By reducing the amount of runoff that enters conventional drainage systems, green infrastructure acts as a crucial tool in adapting urban areas to cope with climate change and urbanization challenges.