Question #148556. Asked by serpa.
Last updated Jul 13 2021.
Originally posted Jul 13 2021 12:02 PM.
Bioswales are vegetated, shallow, landscaped depressions designed to capture, treat, and infiltrate stormwater runoff as it moves downstream. They are typically sized to treat the water quality event, also known as the "first flush," which is the first and often most polluted volume of water resulting from a storm event.