Tuesday, January 30 2018
Not all stormwater retention credits are the same.
Stormwater runoff has two negative impacts on urban waterways: it carries pollution and it often causes severe erosion. Further, stormwater runoff’s impact almost entirely depends on two things: what’s in it and where it goes.
Highly polluted runoff that washes off heavily used streets or parking lots is problematic no matter where it ends up, and stopping it helps to protect the environment. But polluted runoff on the way to a tributary stream is doubly important to stop. If it carries a significant load of oil, gas, toxics, sediment, or trash, and then blasts out the end of a pipe into a small stream, it can cause immense damage. Slowing down and retaining runoff in these areas is environmentally more important that doing the same in the central areas of the city served by the CSS (Combined Sewer System.) This will be particularly true after the huge new underground tunnel system opens next year.
Join AIA|DC and The Anacostia Trust’s to learn about the RainPay program that targets credit-producing “rain gardens” to areas where there is both high pollution and high erosion to maximize environmental protection and value.
Presented by: AIA|DC and the Anacostia Waterfront Trust
After attending this program, participants will be able to:
- Identify the negative impacts of stormwater runoff on urban waterways;
- Discuss the need to mitigate polluted stormwater runoff, especially near tributary streams;
- Explore methods of slowing down and retaining stormwater runoff; and
- Illustrate the benefit of rain gardens projects.