Water Cycle Strategies An integrated approach? Dr Jon Hillman, Scott Wilson Paul Hunt, Sustainable Development Delivery Team, Environment Agency Rob Morris, Strategic Planning Engineer, Anglian Water Services Ltd Mike Burrell, Planning Policy Team Leader, Norwich City Council

 3 million new houses will be built by 2020 (Housing Green Paper, CLG (2007))  Raw water resources, treatment & distribution  Wastewater collection, treatment & discharges (waterbody physical & chemical capacity)  Extreme events – fluvial & pluvial  Water environmental impacts  Energy use & sustainabilty  Location & timing of building programme; location timing of water planning & infrastructure Background

Potential WCS benefits  a method for determining when and where sustainable water infrastructure is needed;  to ensure planning makes best use of environmental capacity and opportunities, and adapts to constraints;  a way for stakeholders to interact, preventing any unexpected obstacles to growth;  process that brings all available knowledge and information together to help make better, more integrated, risk based planning decisions

Where do WCS fit in? Local Development Framework and Planning Applications SFRA Green Infrastructure/ Transport Strategy WCS

Three stages

Delivery mechanisms – timelines

Source: Environment Agency, (2008)

Water Resources and Water Supply  Demands  Existing Water Resources  Future WR schemes  Water Efficiency  Costings

Water Quality and Wastewater  Wastewater Treatment Capacity  Sewer Network Capacity  River Quality Standards  WFD  Watercourse capacity (flood risk)

Is WwTW assessment detailed enough? e.g. phosphorus

Yes Are diffuse sources significant? Are there catchment activities, or opportunties? Are measures feasible, proportionate & within timeframe? Discuss balance of catchment & STW process approaches Processes sustainable? (e.g. P+GHG)? No Yes Suggested amendments…

P: have we got the mix correct?

River flow Total P loads Point Diffuse Contribution to water column concentration River flow P contribution and seasonality of point and diffuse sources (Mainstone et al. 2000)

Flood Risk to development and Flood Risk Management  Fluvial flooding  Tidal flooding  Other flooding sources e.g. DG5 Register  SUDS  Climate Change

Soakaway Gully pot Carrier pipe Road surfaceGullyKerbFootpath Direction of overland flow Local topography Groups of housing Storm/combined sewer Culverted watercourse Open watercourse Manhole Gully Road layout PATHWAY Overland flow from adjacent areas PATHWAY Overland flow PATHWAY Overland flow SOURCE Exceeded sewer capacity SOURCE Exceeded culvert capacity or blockage of culvert RECEPTOR Ponding in low points RECEPTOR Flooded properties RECEPTOR Road traffic & services disruption ! ! !

Conclusions & challenges  Timescales  Integration with AMP, WRP, WFD RBMP (POMS)  Provision of data  Key stakeholders need to be active from brief to completion  Scale  WCS briefs need to be drafted with water specialists to ensure a coherent, catchment orientated approach  For some areas, a Regional Water Cycle approach may be the way forward

Thank-you