Sustainability

Illustration comparing traditional and permeable pavement layers. Traditional has dense surface, subbase, sandy till, subgrade. Permeable features porous asphalt and allows water flow.

Permeable pavements allow rainwater to drain through their surface and into the ground, rather than running off into storm drains. This process helps filter out pollutants, reduces stormwater runoff, and provides much-needed water to surrounding plants, supporting both environmental health and sustainable urban design.

Cross-sectional illustration of a rain garden. Water flows from a downspout into a basin with shrubs and grasses, layered with mulch, soil, and sand for filtration.

Effective surface runoff management is important for maintaining urban infrastructure and preventing flooding. One strategy for managing surface runoff is the use of rain gardens, which are shallow vegetated depressions designed to capture and absorb excess water. These gardens not only help reduce flooding but also improve water quality and support natural infiltration into the ground.

Diagram showing layers of eco-friendly paving. On the left, a tree stands in native soil. Right side features a car atop composite bricks, crushed limestone, and a perforated pipe.

Infiltration trenches are shallow excavations filled with gravel or other permeable materials that allow water to soak into the ground, reducing surface runoff and replenishing groundwater supplies. They are a simple yet effective method for managing stormwater while minimizing the burden on sewer systems.

A cross-section diagram shows a grassy field with arrows indicating water flow into layers below: erosion blanket, soil, aggregates, fabric, and underdrain.

Bioswales or curb extensions are linear vegetated channels designed to capture and infiltrate runoff before it reaches the sewer system. Using an engineered soil mix and native plantings, these systems not only filter out pollutants but also enhance the streetscape with greenery, providing both environmental and aesthetic benefits.