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Cambridge City Council
The Cambridge Approach to
SuDS
Simon Bunn – Sustainable
Drainage Engineer
Drivers:
Growth
Existing
Infrastructure
Elected
Members
Sustainability
1 NIAB – 1593 homes
2 University – 3000 homes
+ 2000 bed student
accommodation
3 Trumpington Meadows –
1200 homes
4 Glebe Farm – 286
homes
5 Addenbrooks 20:20 –
medical research campus
creating 9000 jobs
6 Clay Farm – 2300 –
homes
7 Bell School – 347 homes
+ 100 bed student
accommodation
8 CB1 – 331 homes + 1250
bed student
accommodation
9 North East Cambridge
East Cambridge?
Orchard Park – 1120
What is in the Guide?
Landscape and urban design focused
Cambridge specific and multi disciplinary
What we will adopt and the process
Principles of adoption
Typical section – Ponds and wetlands
On site verification
Maintenance costs
Adoption checklist
Cambridge Design and Adoption Guide –
conclusions:
•Developers appreciate good guidance,
with clear requirements
•Good up front design promoted
•Landscape focused
•Multi-disciplinary teams encouraged
SuDS Exemplars:
What can be achieved
Cambourne, Cambridgeshire
• New residential development of 35 dwellings
• Two-year monitoring project – Interim results:
– In comparison to the control site the SUDS site shows significant
attenuation in flows and volumes following rainfall events
– The SUDS features act to delay discharge of water from the site
– The SUDS treatment train is acting to improve water quality; this is
illustrated through reductions in concentrations of a variety of
pollutants and other indicators.
– There are significantly higher concentrations of hydrocarbons at the
control site compared to the SUDS site.
– The SUDS features offer environmental benefits through a diverse
range of habitats.
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