Stormwater detention temporarily stores runoff and releases it over time through a controlled outlet. Facilities may include basins, tanks, or other systems, with design dependent on site conditions and governing criteria. Detention differs from retention, which generally involves keeping water on site through storage or infiltration. Maintenance and outlet performance are project considerations.
Why it matters for owners
Detention can occupy land and create inspection or maintenance duties. These responsibilities should be clear in project and ownership documents.
