Building Resilient Stormwater Control Measures Through Evaluation of Their Functionality, Pollutant Removal Processes, and Maintenance Requirements
Building resilient stormwater control measures (SCMs) capable of withstanding the challenges of increased flooding, more intense and frequently recurring storm events, aging infrastructure, and overall costs of compliance will require greater utilization of the toolbox available to the development community. But not all SCMs perform equally respective to pollutant removal and runoff reduction. Many sites, especially in urbanized areas, have numerous constraints that make it impractical to manage stormwater runoff with GI practices alone and multiple stormwater programs around the country are recognizing that a grey/green infrastructure (GI) mix is a necessary program building block. To ultimately meet water quality goals in a challenging and changing environment, how can SCMs be constructed to adapt and thrive? This paper contains recommendations for the development of resilient SCMs and focuses on detailing the key criteria needed to inform that decision making process, including (1) fully appreciating the specific pollutant removal processes and runoff reduction mechanisms of the SCM types, (2) the importance of identifying design constraints that may inhibit SCMs from achieving the desired performance level, and (3) consideration of maintenance impacts on long-term performance.