Sustainable Drainage System Terms A-Z
B
balancing pond
A pond designed to attenuate flows by storing runoff during the peak flow and releasing it at a controlled rate during and after the peak flow has passed. The pond always contains water. Also known as wet detention pond.
basin
Flow control or water treatment structure that is normally dry.
biodegradation
Decomposition of organic matter by micro-organisms and other living things.
bioretention area
A depressed landscaping area that is allowed to collect runoff so it percolates through the soil below the area into an underdrain, thereby promoting pollutant removal.
brown roof
A roof that incorporates a substrate (laid over a waterproof membrane) that is allowed to colonise naturally. Sometimes referred to as an alternative roof. |
