Upton(SUDS)

Details

Dealing effectively with water was a key priority for the urban extension at Upton following the floods in Northampton in 1998. English Partnerships recognised the importance of implementing a Sustainable Urban Drainage System (SUDS) scheme early in the design process to control surface water runoff at source.

The strategy was to limit and control surface water runoff through:

• Water butts, green roofs and permeable paving within courtyards, with restricted discharge into the public surface water drainage system
• A pipe and swale system that provide attenuation and transfer of surface water through the system
• Linked storage ponds constructed at the end of the system, around playing fields, prior to controlled discharge

The site’s relatively steep gradient (approximately 1:30) presented a challenge in terms of creation and utilisation of storage volume. Where possible, swales were aligned parallel to contour lines to maximise storage and surface area for infiltration. Where this was not possible, they were aligned to follow the slope and weirs were designed at intervals to retain the surface water, increase storage volume and also enable easy maintenance.

The drainage schemes have enhanced the high quality open green spaces provided with the swale and pond network providing ‘green fingers’ extending from the country park into the public realm, enhancing the local biodiversity. Health and safety has been a prioritisation, with early and continuous involvement of the Planning Supervisor during the design process.

A management strategy of improving public awareness and understanding of the risks of surface water within the public realm has been implemented, rather than erecting impenetrable barriers across the site.

Other Information

Case Study Downloads

• Upton Framework Plan PDF (2.4mb)