Water Cycle Strategies An integrated approach

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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

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Background

• 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

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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

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Where do WCS fit in?
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Three stages
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Delivery mechanisms timelines
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Source Environment Agency, (2008)
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Water Resources and Water Supply

• Demands
• Existing Water Resources
• Future WR schemes
• Water Efficiency
• Costings

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Water Quality and Wastewater

• Wastewater Treatment Capacity
• Sewer Network Capacity
• River Quality Standards
• WFD
• Watercourse capacity (flood risk)

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Is WwTW assessment detailed enough? e.g.
phosphorus
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Suggested amendments
Yes
Yes
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P have we got the mix correct?
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P contribution and seasonality of point and
diffuse sources
River flow
River flow
Contribution to water column concentration
(Mainstone et al. 2000)
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Flood Risk to development and Flood Risk
Management

• Fluvial flooding
• Tidal flooding
• Other flooding sources e.g. DG5 Register
• SUDS
• Climate Change

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PATHWAY Overland flow
PATHWAY Overland flow
PATHWAY Overland flow from adjacent areas
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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

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Thank-youJonathan.Hillman_at_scottwilson.com