Can My Cistern Double as a Stormwater Management System?

Integrating Stormwater Management with a Cistern

A buried concrete cistern can be designed and installed to capture and store stormwater runoff, reducing the burden on municipal drainage systems and mitigating stormwater pollution. A typical stormwater management system should include a catchment area, a conveyance system, and a storage tank like the cistern. A properly sized cistern can capture and store between 1,000 to 5,000 gallons of stormwater runoff, reducing the risk of flooding and stormwater pollution.

Design Considerations for a Stormwater Management Cistern

When designing a cistern for stormwater management, consider the following factors: catchment area size, conveyance system design, cistern size and depth, and treatment systems. The catchment area should be sized to capture a certain amount of rainfall, typically between 0.5 to 2 inches of rainfall per storm event. A conveyance system like a perforated pipe or a French drain should be installed to direct stormwater runoff to the cistern. The cistern itself should be sized to store the captured stormwater, and treatment systems like sedimentation tanks or filters may be necessary to remove contaminants from the stored water.

Maintenance and Inspection for a Stormwater Management Cistern

Regular maintenance and inspection of the stormwater management cistern are crucial to ensure its effectiveness in reducing stormwater pollution and alleviating pressure on municipal drainage systems. Inspect the cistern and its components regularly for signs of damage, sedimentation, or contamination. Clean and maintain the cistern as necessary, and consider installing monitoring equipment to track water quality and flow rates. By properly designing, installing, and maintaining a stormwater management cistern, property owners can reduce stormwater pollution and protect local waterways.