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→Overview
* Previous concrete; and
* Previous concrete; and
* Porous asphalt.
* Porous asphalt.
Depending on the native soils and physical constraints, the system may be designed with no underdrain for full infiltration, with an underdrain for partial infiltration, or with an impermeable liner and underdrain for a no infiltration or detention and filtration only practice (Figure ). Permeable paving allows for filtration, storage, or infiltration of runoff, and can reduce or eliminate surface stormwater flows compared to traditional impervious paving surfaces like concrete and asphalt.
==Planning Considerations:==
Common Concerns