Sustainable Drainage System Terms A-Z
G
greenfield runoff
This is the surface water runoff regime from a site before development, or the existing site conditions for brownfield redevelopment sites.
green roof
A roof with plants growing on its surface, which contributes to local biodiversity. The vegetated surface provides a degree of retention, attenuation and treatment of rainwater, and promotes evapotranspiration. (Sometimes referred to as an alternative roof).
greywater
Wastewater from sinks, baths, showers and domestic appliances this water before it reaches the sewer (or septic tank system).
groundwater
Water that is below the surface of ground in the saturation zone. |
