HOW AND WHEN DO WE
DELIVER WATER SENSITIVE GI?
Green Infrastructure: Scales
Mountain and Polar
Forest and Woodland
Drylands
Inland
water
Cultivated
Urban Landscape
Island, Marine and Costal
Source: ASLA
Integrated Drainage and Water Management
• Small to large scale
• Plan SuDS as a
network
• New legislation for new
development
• Drivers to retrofit
existing areas
• Water management
features selected to be
appropriate to context
Source: CIRIA: SuDS Guidance for Planners
USING STRATEGIC PLANNING
OF GREEN INFRASTRUCTURE
Case Study: Black Country Environmental Infrastructure Strategy
Examining the multiple benefits of GI for:
Employment Value
Biodiversity
Housing Quality
Recreation
Green Transport
Heritage and Tourism
Biomass and Food
Production
Water Protection
and Treatment
Air Quality
Thermal Profile of the Black Country
Examining Local Flood Risk
• The risk of fluvial flooding is
relatively low
• Very high risk of surface
water flooding
• SuDS systems will play an
important role to minimise
surface flooding
• Sensitivities of contaminated
land and groundwater
protection areas
Heat Wave Risk
Localised Flooding
Social Vulnerability
Future Places: Green roofs in Urban Heat
Island Risk Areas and Flood Risk Areas
Urban Wetlands: Strategic Water Treatment Areas
around waterways and in commercial areas
Positive Traffic Calming: Street Raingardens
Natural Learning: Climate change adaptation for schools
USING SITE PLANNING OF
GREEN INFRASTRUCTURE
Case Study: Doncaster Hill Water Sensitive Design
Source: CIRIA: SuDS Guidance for Planners
Introducing Doncaster Hill
Comprehensive and intergated
water management
Reuse of stormwater considered
alongside use of greywater and
rainwater
On this site, the cricket ovals
create a large water demand
where treated stormwater is most
suitable for use
Channelling water to the ovals
using gravity provides
opportunities for landscape
features and education on the way
Water Reuse
Civic Precinct Water Profile
Building demand can be reduced
by local or site-wide water recycling
Stormwater can be channelled to large oval
irrigation demands at the bottom of the site
Demand Supply
Supply Demand
Rainfall on
14 Ha site
110ML/year
Stormwater
Runoff
~64ML/year
Civic Buildings
Civic Landscape
Residential
Buildings Residential
Landscape
Oval 1
Oval 2
Key
Supply from
greywater/wastewater
Non-potable demand
for any source
Supply from
rainwater/stormwater
Non-potable demand
best suited to stormwater
Irrigation
3.5ML/year
Irrigation
3.5ML/year
25m
Drop
WSUD vision
A suite of features of introduced on site to capture, treat
and reuse water while creating a vibrant public realm
and an educational trail.
Oval Irrigation Storage
Carpark Biofiltration
7
6
Community Water Feature
Wetland Strips
5
Gravity Powered Feature
4
Greywater Green Walls
7
Local Irrigation Storage
3
Cascade & Wetland
2
Urban Forest Stream
1
Roof Garden Biofiltration
6
3
2
5
4
1
1 Roof Garden Biofiltration
Water
Treatment
Landscape
Feature
Energy
Efficiency
Ecology
Material
Efficiency
Attenuation
Sustainability
Connections
Planted biofiltration areas are integrated with the roof
garden design for water treatment and additional roof
insulation. Placement above columns gives structural
efficiency. Biofiltration will slow down water flows by
6-12 hours so that water can be released gradually.
1