What is the purpose of perimeter controls in stormwater management?

The purpose of perimeter controls in stormwater management is to keep sediment on site and protect neighboring properties. These controls are implemented to create a barrier around a construction site or other disturbance areas, effectively preventing the movement of sediment and other pollutants off-site during rainfall or weather events. By doing this, perimeter controls help to minimize erosion and water quality impacts on adjacent waterways and communities.

Properly installed and maintained perimeter controls, such as silt fences or sediment traps, play a crucial role in effective stormwater management by ensuring that sediment does not leave the site and contribute to sedimentation problems elsewhere, which can lead to habitat loss and water quality degradation. This is vital for compliance with environmental regulations and for maintaining the ecological integrity of nearby areas.

Other choices might involve aspects of stormwater management, but they do not align with the fundamental purpose of perimeter controls, which is primarily focused on sediment retention and site protection.