Water SensitiveUrban DesignDeveloping our approach in WalesAaron BurtonMarch 2012
Outline Drivers in Wales Pilots/ case studies The future
Housing challenge Additional 200,000new homes by 2025  Additional 30,000new homes inCardiff by 2025  80% of existing  home...
DCWWWater ResourcesDeficit zones: SEWCUS: -12 to -104 Ml/d Pembrokeshire: -13 to -19 Ml/d Brecon: -1 Ml/d NEYM: +2.9 t...
Water and carbon connection      5% UK annual carbon   1% UK annual carbon      Emissions             emissions      (~3% ...
Flooding – Surface water                             Majority of surface                           water problem locations...
Scott (2011) Surface water management in a changing legislative framework, Presented at ICE Wales Flooding conferencehttp:...
NEF - Ecosystem servicesEcosystem Service          Green roofs/              Street trees                 Wetlands        ...
Pilots/Case Studies
Water Sensitive Brynheulog   Site issues:   •Blocked   drainage   •Erosion and   WQ   •Flooding past   issue/ road   surfa...
Before
WSUD Measures     Bioretention Systems                                                                       Overf low pit...
WetlandsWetland/raingarden   Raingardens/ RWH
Welsh Housing Quality Standard 16% of households in Wales SAP rating for energy (space and water heating) Responsible for ...
Community based schemes                      Reeds used to cut pollution in                      Llanfyllins River Cain
Caearau & Brynglas SUDS Pilot
140Total emissions - water, sewerage, surface water, SuDS,                                                          120   ...
Water Sensitive Communities Value of Water and behaviour change                           140                             ...
Future work
WSUD Programme Board To guide decision                                   WR making and resource                     Planni...
Pilots:                                                    Bryheulog  Academic:                            Industry:      ...
CIRIA WSUD Workshop Cardiff
CIRIA WSUD Workshop Cardiff
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CIRIA WSUD Workshop Cardiff

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Presentation for CIRIA WSUD Scoping Study Workshop at the National Museum of Wales, Cardiff. March 2012.

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CIRIA WSUD Workshop Cardiff

  1. 1. Water SensitiveUrban DesignDeveloping our approach in WalesAaron BurtonMarch 2012
  2. 2. Outline Drivers in Wales Pilots/ case studies The future
  3. 3. Housing challenge Additional 200,000new homes by 2025 Additional 30,000new homes inCardiff by 2025 80% of existing homes remain by 2050
  4. 4. DCWWWater ResourcesDeficit zones: SEWCUS: -12 to -104 Ml/d Pembrokeshire: -13 to -19 Ml/d Brecon: -1 Ml/d NEYM: +2.9 to -5 Ml/d (context – Cardiff daily household use is around 50 Ml/d)
  5. 5. Water and carbon connection 5% UK annual carbon 1% UK annual carbon Emissions emissions (~3% in Wales)
  6. 6. Flooding – Surface water Majority of surface water problem locations are in SE Wales
  7. 7. Scott (2011) Surface water management in a changing legislative framework, Presented at ICE Wales Flooding conferencehttp://www.ice.org.uk/getattachment/20b63757-2855-43c2-98e0-8ca42da77696/Wales-Flooding-Conference-2011-Dominic-Scott.aspx
  8. 8. NEF - Ecosystem servicesEcosystem Service Green roofs/ Street trees Wetlands Rainwater Water and Rain walls harvesting energy gardens/ efficiency bioretentionReduce flood risk     Offset urban heat    islandReduce energy    demandReduce noise/ air  pollutionSupport biodiversity    Recreation/ leisure  Reduce water use   Reduce wastewater flowsReduced CO2      Reduced water and    energy bills Adapted from GLA (2011) Managing risks and increasing resilience – The Mayor’s Climate Change Adaptation Strategy, p. 90, http://www.london.gov.uk/sites/default/files/Adaptation-oct11.pdf (Accessed 05/11/12)
  9. 9. Pilots/Case Studies
  10. 10. Water Sensitive Brynheulog Site issues: •Blocked drainage •Erosion and WQ •Flooding past issue/ road surface issues
  11. 11. Before
  12. 12. WSUD Measures Bioretention Systems Overf low pit Slot in kerb Footpath RoadRain gardens 0.1 - 0.3 m Temporary ponding 0.5 - 1m Filter media 0.1 m Transition layer (sand) 0.15 m Drainage layer, with perf orated pipes (gravel) Impervious liner Stormwater drainage (eg 375 mm pipe) 0.5 – 1.5 m Kerb opening through lintel (Ku-ring-gai Council) Slotted kerb opening and grate (Docklands, Melbourne) Wetlands at differing scales
  13. 13. WetlandsWetland/raingarden Raingardens/ RWH
  14. 14. Welsh Housing Quality Standard 16% of households in Wales SAP rating for energy (space and water heating) Responsible for “environment” and landscapes EAW & EST Guidance to support WHQS (based on pilot study & survey) WC partnerships Refurbishment Voids and maintenance WSUD Guidance and Pilot Studies
  15. 15. Community based schemes Reeds used to cut pollution in Llanfyllins River Cain
  16. 16. Caearau & Brynglas SUDS Pilot
  17. 17. 140Total emissions - water, sewerage, surface water, SuDS, 120 100 RWH embodied(tCo2e) 80 60 40 20 0 Baseline RWH with RWH with RWH with RWH with SuDS only SuDS + SuDS + SuDS + 300l SuDS + 100l Traditional traditional traditional traditional 1500l RWH 1500l RWH RWH RWH Solution solution solution solution new tech (new tech) Option NO14 (464 props) BY21 (278 Props) BP04 (1 school + 10 props) Broader costs and benefits? Maintenance, adoption, uptake rates etc…
  18. 18. Water Sensitive Communities Value of Water and behaviour change 140 25 120 20 Carbon Saving kgCO2/yr 100 Water saving (m3/yr) 15 80 60 10 40 5 20 0 0 All In-home Mail, events, Mail, events, Mail, events, telephone (1) telephone (2) telephone (3) Advice method Average saving per customer (CO2 heating + embodied) Kg CO2/yr Average water saving (m3/yr)
  19. 19. Future work
  20. 20. WSUD Programme Board To guide decision WR making and resource Planning WFD input as we develop our approach to Water WQ Land Man Sensitive Urban Design WSUD in Wales. Air Quality Groundwater Climate Biodiversity Change FRCM
  21. 21. Pilots: Bryheulog Academic: Industry: Cardiff tbc Retrofit2050 CIRIA Scoping Study Caerau & Brynglas PREPARED SuDS Wales Groups CCW - NERTSB Future Cities IWA Future Cities Wetland Mapping HA Water Pilot Living Wise Cardiff Policy: Programmes: FUTURE: SPPSoW Periodic Review •WSUD Guidance Housing Bill WRMP •Pilot technology Planning Bill DCWW SWEAR •Sector wideBuilding Regulations DCWW SDPs learning programmes WHQS EAW CFMPs (LZCH?) SuDS Guidance LA SWMPs •Community 1st /SABs Diffuse Pollution AP •EU Life+ Overview of activities in Wales Feb 2012

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