Sustainable Drainage Systems (SuDS)
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Following the Pitt review of the 2007 summer floods and introduction of The Flood and Water Management Act in February 2010, local authorities throughout England have been required to implement a strategy for local flood risk management. All authorities are obliged to ensure that all new construction work with the exception of publicly-maintained roads and single properties, includes a Sustainable Drainage System (SuDS).

These drainage systems often include porous tarmac and similar surfaces to minimise surface water run-off into main drains. The water is then allowed to soak away naturally by mimicking natural water systems such as ponds, swales and basins. A suitable SuDS approach requires analysis of local conditions and sub-soil characteristics, followed by detailed design by a suitably qualified and experienced engineer.

Over the past three years, Mason Navarro Pledge have designed and implemented Sustainable Drainage Systems on several major projects including schools in Brent, major housing developments and a 25,000m2 car park at London Luton Airport.

These developments have since been subjected to the wettest year on record in 2012 and a wet start to 2013, coping efficiently with every peak in rainfall.

A range of features were included in these SuDS designs: At Brentfield and Newfield schools in the London Borough of Brent, MNP designed drainage for new playgrounds and sports pitches, enabling completely flat playing surfaces for netball and 5-a-side football.

As part of Luton’s New Homes partnership, MNP designed permeable block paving for 62 new homes at the Hart Hill development and 70 homes at Wigmore Lane. A series of interconnecting dams were installed down a hillside to manage peak water flow and collect debris.

At the Luton Airport project, working with Ryebridge Construction, MNP designed land drainage to a reservoir, from porous ashphalt car park spaces. The car park was constructed on reclaimed land and the 6-week project included ground stabilisation and crushing existing building materials from the site to form a sub-base for the roads.

For more information about MNP’s approach to SuDS design call us on 01462 632 012.

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