The Application of SUDS to a High Density Urban Environment using

Singapore as a Case Study

Simon Chuand

Martin MansellSchool of Engineering and Science

University of Paisley

Singapore

Typical Large Flood Channel

Typical Reservoir

Water Consumption

Possible SUDS Applications

Rainwater Storage/Re-use

Permeable Pavements

Swales?

Ponds/Basins ?

Typical Residential Neighbourhood

Area Around Housing Block

driveway and car parking

High Rise Housing Block

pavement pavement

grass grass

road

Rainwater Tank Model

overflow

rainwater

consumption

Rainwater Tank Reliability

  Reliability (%)

ConsumptionLitres/Person/day

Tank Vol = 10 m3

Tank Vol = 30 m3

Tank Vol = 45 m3

20 49.2 68.4 75.5

40 26.0 40.3 47.6

60 20.0 28.8 30.7

80 16.0 18.0 23.0

Reservoir Model

Runoff (O)

Infiltration (I)

Rainfall (R)

Storage (S)Depth (D)

Output from Model

10min 5yr RP

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0 10 20 30 40

mins

cu.m

./s.

impermeable surface

permeable paving

roof spill

Green Roofs

Conclusions

Grey-water

high internal cost

low treatment cost

Potable water

low internal cost

high treatment cost

Permeable Paving

areas of specific flood risk

would be cost effective for new build

Surface Storage

health risks