What role do vegetated swales play in stormwater management?

Vegetated swales are designed specifically to manage stormwater effectively by enhancing infiltration and filtering pollutants. These low-lying areas, typically planted with grasses or other vegetation, slow down the flow of water and provide a medium for it to permeate into the soil. This infiltration process reduces surface runoff, which helps to lower the risk of flooding and erosion.

Additionally, as water flows through the swale, the vegetation and soil effectively capture and filter out contaminants and sediments present in the stormwater. This natural filtration process improves water quality before it reaches larger water bodies or the groundwater table. The design encourages biological activity in the soil, contributing to the breakdown of pollutants and ensuring cleaner water is released back into the environment.

This multifunctional role makes vegetated swales an integral component of sustainable stormwater management practices, highlighting their ability to address both the quantity and quality of runoff.