Green gutters are narrow, shallow landscaped strips along a street’s curb line that are designed to allow stormwater runoff from both the street and the sidewalk to flow directly into the system.
Green gutters are narrow and shallow landscaped strips along a street’s curbline. The top of the planting media in the green gutter is lower than the street’s gutter elevation, allowing stormwater runoff from both the street and sidewalk to flow directly into the system. Green gutters may be lined with geotextile (permeable or impermeable) and are commonly planted with a variety of grasses and flowering perennials. Stormwater is infiltrated into the underlying soil and/or slowly released back to the existing sewer through a downstream curb cut. Green gutter vegetation helps reduce the volume of stormwater runoff through evapotranspiration. Green gutters are typically located within the public right-of-way either mid-block or at intersections.