Infiltration basin

An infiltration basin (or recharge basin) is a form of engineered sump[1] or percolation pond[2] that is used to manage stormwater runoff, prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay.

It is essentially a shallow artificial pond that is designed to infiltrate stormwater through permeable soils into the groundwater aquifer.

[3][4][5] It is distinguished from a detention basin, sometimes called a dry pond, which is designed to discharge to a downstream water body (although it may incidentally infiltrate some of its volume to groundwater); and from a retention basin, which is designed to include a permanent pool of water.

They may be less effective in areas with: At some sites infiltration basins have worked effectively where the installation also includes an extended detention basin as a pretreatment stage, to remove sediment.

[7] The basins may fail where they cannot be frequently maintained, and their use is discouraged in some areas of the United States.