What is the main purpose of stormwater control and containment devices in development projects?

What is the main purpose of stormwater control and containment devices in development projects?

• A. To increase downstream flows
• B. To reduce peak runoff and manage increased post-development flow
• C. To eliminate rainfall entirely
• D. To ensure zero runoff

Answer: (B)

Stormwater control and containment devices are used to manage the larger and faster runoff that comes with development, especially where surfaces are made impervious. Their main purpose is to reduce the peak rate of runoff and to control the overall post-development flow so that it doesn’t overwhelm downstream channels, cause flooding, or erode waterways. They work by delaying, detaining, infiltrating, or filtering stormwater, which helps mimic the natural hydrology before development and protects water quality along the way. They won’t stop rainfall or eliminate runoff entirely, nor can they create zero runoff in urban areas.

Stormwater control and containment devices are used to manage the larger and faster runoff that comes with development, especially where surfaces are made impervious. Their main purpose is to reduce the peak rate of runoff and to control the overall post-development flow so that it doesn’t overwhelm downstream channels, cause flooding, or erode waterways. They work by delaying, detaining, infiltrating, or filtering stormwater, which helps mimic the natural hydrology before development and protects water quality along the way. They won’t stop rainfall or eliminate runoff entirely, nor can they create zero runoff in urban areas.