What are Bioretention Facilities?
Bioretention is a practice to manage and treat stormwater runoff by using a conditioned planting soil bed and planting materials to filter runoff stored within a shallow depression.
The system can include the following components: a pretreatment filter strip of grass area, a shallow surface water ponding area, a bioretention planting area, a soil zone, an under drain system, and an overflow outlet structure.
Bioretention facilities can be distributed across a development site which can result in smaller, more manageable stormwater management, and thus, helping control runoff close to the source where it is generated.
Bioretention facilities capture rainwater runoff to be filtered through a prepared soil medium.
Once the soil medium reaches capacity, stormwater begins to pool at the surface of the planting soil.