Does retrofitting stormwater green infrastructure …...Does retrofitting stormwater green infrastructure support urban regeneration for communities? Today’s presentation will cover;

Does retrofitting stormwater green infrastructure support urban regeneration for communities?

Informing the developing masterplan for the Weston-super-Mare regeneration project

Presented by Paul A. Hargreaves (CH2M)

Does retrofitting stormwater green infrastructure support urban regeneration for communities?

Today’s presentation will cover;

1. Introduction

2. Aims of the study

3. What are the options for retrofit SuDS in Weston-super-Mare?

4. Visualisations - What could the SuDS look like?

5. Lessons learnt

Photo: The Station Gateway site from Hildesheim Bridge (A370)

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Introduction – SuDS the broader benefits?

• England is one of the most densely populated countries in Europe

• With a population density of 413 people / km2

• Atmospheric pollution is increasing which will have a detrimental effect on the populous in urban areas

• Green infrastructure can reduce such pollutants

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Introduction – SuDS the broader benefits?

• 40% of the world’s population currently lives in water stressed areas

• In the UK households and industry are the major users of fresh water

• If rainwater harvesting is retrofitted, the over-reliance on treated water for certain uses could be reduced

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Introduction – A bit of background on Weston-super-Mare….

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Introduction – Existing flood risk?

Source: https://flood-map-for-planning.service.gov.uk/summary/331859/161596

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Introduction – Existing flood risk?

Source: https://flood-warning-information.service.gov.uk/long-term-flood-risk/map?easting=332053&northing=161131&address=24009991&map=SurfaceWater

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Introduction – The development areas

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Aims of the study

To support the developing regeneration plans for Weston-super-Mare town centre by;

• Determining the opportunities and constraints for each location

• Identifying the opportunities for retrofit SuDS within the area of Weston-super-Mare town centre regeneration,

• Demonstrating that retrofit SuDS could reduce surface water runoff rates by 30%

• Providing supporting information to convince the community and project partners of the benefits

• The SuDS should contribute towards making the development sites ‘high quality’

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What are the options for retrofit SuDS in Weston-super-Mare

• Green roofs

• Green walls

• Rainwater harvesting

• Permeable paving

• Bio-retention

• Swales

• Basins

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Visualisations – The plan for Walliscote Place….

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Visualisations – Walliscote Place from Oxford Street

Bio-retention

Green roofs

Green wall

Bio-retention

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Visualisations – Walliscote Place from Station RoadBio-retention

Green wall

Bio-retention

Green roof

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Lessons learnt and the next steps

• Visualisations are an essential tool

• Inclusion of retrofit SuDS in a supplementary planning document is critical to ensure delivery

• Publicise the outputs from such studies to provide inspiration for those designing the public realm and development sites

• Changing attitudes towards the design of SuDS can be a real barrier (lack of experience and the perceived additional time to design)

Thank You

Visit stand B49…- Speak to me about my presentation- Find out more about CH2M- Play our interactive flood manager game and win…- Enjoy complimentary fresh fruit