Bioswale
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Bioswales are channels designed to concentrate and convey stormwater runoff while removing debris and pollution. Bioswales can also be beneficial in recharging groundwater.
Runoff from the vicinity flows into an adjacent bioswale
Two bioswales for a housing development. The foreground one is under construction while the background one is established.
A curbside bioswale in Chicago.
Check dam
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A check dam is a small, sometimes temporary, dam constructed across a swale, drainage ditch, or waterway to counteract erosion by reducing water flow velocity. Check dams themselves are not a type of new technology; rather, they are an ancient technique dating from the second century AD. Check dams are typically, though not always, implemented in a system of several dams situated at regular intervals across the area of interest.
Concrete check dams in Austria
A steel check dam
A common application of check dams is in bioswales, which are artificial drainage channels that are designed to remove silt and pollution from runoff.
A check dam across the Kudumbur River, in Kerala, India