SUDS

Question 1

Aim

Answer 1

The idea behind SUDS is to try to replicate the drainage patterns of natural systems by using cost-effective solutions
This is to counter the effects of conventional drainage systems that often allow for flooding, pollution of the environment – with the resultant harm to wildlife – and contamination of groundwater sources used to provide drinking water.

Question 2

Swales

Answer 2

Are shallow, broad and vegetated channels designed to store and/or move runoff and remove pollutants. Can pass the runoff to the next stage of treatment and can be designed to promote infiltration where soil and groundwater conditions allow

Question 3

Rain gardens/ green roofs

Answer 3

These cover the roof of a building with vegetation cover/landscaping. The roof is likely to consist of an impermeable layer, a substrate or growing medium and a drainage layer, designed to intercept and hold precipitation, reducing the volume of runoff and lowering peak flows.

Question 4

Bioretention areas

Answer 4

Shallow landscaped depressions which rely on engineered soils, enhanced vegetation and filtration to remove pollution

Question 5

Wetlands

Answer 5

Shallow ponds and marshy areas, detain flows for an extended period and allow sediment to settle

Question 6

Retention ponds

Answer 6

small lakes that store storm water and allow for its treatment