D4RUNOFF NBS Library: https://d4runoff.eu/resources/

Bioretention systems are bioretention shallow basins designed to collect, store, filter and treat water runoff. To optimize its functions, it must include a porous soil mixture, native vegetation and some hyperaccumulator plants, capable of phytoremediation. Bioretention areas are established in artificial surroundings and catches water runoff from roofs, roads and other (sealed) surfaces. Storm water runoff is drained into the area, where it is stored for a certain period, and infiltrates either into the ground soil or flows into the sewage system. A certain amount of water is taken up and transpired by plants. Bioretention systems should be incorporated into the site landscaping such that they do not require extra land take over and above the landscaping that would normally be required for the development.