As filtration becomes a more common tool in stormwater management, and as the number of design variants increases, so does the number of names for each of these variants. For example:
- Sand filters are also referred to as filtration basins, filter systems, first-flush filtration, or media filtration systems.
- Grass channels are also referred to as biofilters. (Seattle METRO, 1992 from CWP)
- Dry swales are also referred to as grassed or vegetated swales.
In this section we provide information for different types of sand (media) filters along with an overview of vegetated filter variants.