| 摘要 |
A sustainable drainage device (106 figure 1) has a box unit 700 that provides a self-contained sustainable drainage system (SUDS), with flow control, attenuation and water treatment functions. The device can take the form of a rain barrel, a rain garden or of a driveway unit. The device comprises internal partitions 702, 704 which form chambers 706, 708, 710 with at least one partition having a plurality of orifices for regulating flow between chambers. At least one of the chambers may comprise a biological layer 720 to provide a biological degradation of pollutants. The biological layer may comprise plant material planted in soil. A lower portion of the at least one chamber may comprise a filtration material 718 such as gravel. |
