Green Stormwater Management

Treating Water as a Natural Resource

Langan has led the way in the environmental engineering of Green Stormwater Best Management Practices (BMPs). These practices reduce the initial rate of runoff and improve the quality of stormwater runoff from sites. Generally, BMPs focus on water quality problems caused by increased impervious surfaces from land development. BMPs are designed to reduce stormwater volume, peak flows, and/or nonpoint source pollution through evapotranspiration, infiltration, detention and filtration. These are increasingly required by local, state and federal development codes.

Green Stormwater BMPs include modified landscaping and hardscaping practices to reduce impervious surfaces and create more capacity to infiltrate stormwater within the site. Integrating sustainable stormwater elements early in the design provides a more economical approach to drainage for all of our clients. Langan has demonstrated success in helping clients and cities transform their approach to drainage by moving to relatively low-tech green infrastructure measures.

Langan Green Stormwater BMPs measures include:

• Rain gardens and green roofs
• Bioswales
• Pervious safety surfaces for all playground areas
• Native meadow plantings
• Infiltration trenches
• Porous paving to manage rainwater in sewer systems