Buffer
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Buffer strips are commonly used as a source control measure, particularly for management of diffuse runoff. Buffer strips are vegetated strips adjacent to drainage lines, rather than constructed vegetated channels, which are known as swales. Buffer strips are effective in the removal of coarse to medium sized suspended solids and bed loads and can be used as a pre-treatment to linear infiltration systems such as bio-retention systems. They also can assist in reduction of peak flows for smaller events and may promote infiltration dependent upon the underlying soil conditions. Buffer strip treatment only applies to runoff from impervious surfaces and can be used to represent catchment conditions where runoff from impervious surfaces needs to flow across grassed areas towards the stormwater drainage system.
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