Flood Risk Assessment
Oxford Academy FRA
Keywords: Flood Risk Assessment, FRA, SuDS, Climate Change
Oxford Academy master plan
Client, Architect & Other Organisations
Ebb Tide Investments Ltd Bernard Austin Architects Ken Parke Planning
Description
The redevelopment of the Peers school into Oxford Academy site envisaged the demolition of a number of the existing school buildings in the northern portion of the site and the construction of a modern educational facility to replace the existing buildings. The suite of the new facilities for the school included:-
- • Sports Dome
- • Core and sports building to the south of synthetic sports pitches
- • An entrance building
- • An arts and science building
- • A Teaching & Communications Building
- • A full sized synthetic pitch to the north west of the site
- • Three netball and two tennis courts
- • A pedestrian and bicycle access route from the north and east
- • A car park to the north-east boundary of the site.
- • Landscaping including grassed areas, tree, ornamental shrub, native scrub and copse planting.
The flood risk mapping indicated that the site was outside the above zones and classified as having a Low Risk of flooding and is Zone 1. However, the site was larger than 1 hectare and therefore required a Flood Risk assessment in accordance with PPS25.
Scope of Work
The drainage proposals formed the core of the FRA and include a range of sustainable drainage solutions including the use of filter drains, porous paving, porous asphalt to promote infiltration in conjunction with an attenuation pond / wetland to control discharge from impermeable surfaces and roofs to a Thames Water Storm Sewer. The objectives were to:-
- Develop a water treatment train appropriate to the pollution loading.
- Ensure that peak discharge rates and volumes from the site would not increase as a result of the proposed development up to and including the 1 in 100 year storm with a suitable allowance for climate change.
- Ensure that the site will not flood from surface water up to the 1 in 100 year storm with a suitable allowance for climate change and make provision to accommodate exceedance within the hydraulic design by providing suitable overflow routes and storage on the site.
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