Bioretention: Parking lots

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
TreesTreesTreesGraminoids: ListGraminoids: ListForebaysForebaysCurb cutsCurb cutsOverflowOverflowBioretention: Filter mediaBioretention: Filter mediaChoking layerReservoir aggregateReservoir aggregateUnderdrain
This is an image map of an extended tree pit, clicking on components will load the appropriate article.

On commercial, industrial and multi-unit developments, a popular choice is to integrate bioretention into parking lot landscaped areas. These distributed cells typically accept sheet flow through multiple curb cuts, have shallow depression storage ≤ 100 mm, and a total area of 5 -200 m2. Although many parking lot schemes include long linear bioretention cells (≥ 0.6 m wide), infiltration is optimized by having a level grade and a level base, unlike a bioswale.

Winter maintenance[edit]

Salt can be damaging to the planting in parking lot bioretention. To help minimize this, bioretention practices adjacent to parking areas should always have an underdrain and salt use be reduced through good design and planning of the parking lot.


See Also[edit]