Regulations & Guidance
General Guidance
Over recent years there has been a number of studies conducted and resulting comment and guidance have been published, all of which consider how sustainable drainage should be encouraged and implemented. Added to this, regulatory guidance is also evolving.
Planning Policy Statement 25 (PPS25) December 2006. Department of Communities and Local Government (DCLG)
Development and flood risk
Published in December 2006, PPS25 sets out the Governments policy on different aspects of land use planning in England. With respect to SUDS, the policy document states that "Regional planning bodies and local authorities should promote the use of SUDS for the management of run-off. Local planning authorities should ensure that their policies and decisions on application support and complement Building Regulations."
Building Regulations. Department of Communities and Local Government (DCLG)
Approved Document H3: Rainwater drainage, 2002 states methods of drainage other than connection to a public surface water sewer are encouraged where they are technically feasible.
Future Water February 2008. Department for Environment, Food and Rural Affairs (DEFRA)
The Governments water strategy for England,
This document sets out the Governments plans for water in the future, in light of the effects climate change and increasing demand are having on water supply. Chapter 5 deals with surface water drainage and call for "more adaptable drainage systems delivering reduced flood risk, improved water quality and decreasing burdens on the sewer system."
The Pitt Review
Learning Lessons from the 2007 floods. Sir Michael Pitt.
This report contains over 90 recommendations for better flood risk planning in England and Wales. In December 2008, the Government provided a response to the report. A number of the recommendations concern the use and adoption of SUDS. "Local Surface water management plans (SWMPs) as set out under PPS25 and coordinated by local authorities should provide the basis for managing all local flood risk." The Government response was to support this recommendation and state the intention that Local Authorities will be responsible for adopting and maintaining sustainable drainage systems (SUDS) in the public realm.
The Code for Sustainable Homes February 2008 Department for Communities and Local Government (DCLG)
Category 4: Surface Water Run-off deals with the management of surface water run-off from developments, the stated aim being: To design housing developments which avoid, reduce and delay the discharge of rainfall to public sewers and watercourses.
CIRIA publications
The SUDS Manual 2007 CIRIA C697
This guidance provides best practice guidance on the planning, design, construction, operation and maintenance of Sustainable Drainage Systems (SUDS) to facilitate their effective implementation within developments.
Sustainable drainage systems - Hydraulic, structural and water quality advice 2004 CIRIA C609.
A report that details the appropriate approach to the successful design and construction of Sustainable Drainage Systems.
Structural design of modular geocellular drainage tanks 2008 CIRIA C680.
Co-sponsored by Marley, this report focuses specifically on the different types of underground geocelluar modular units. It provides guidance on test methods, structural design and the practical issues that should be considered in the design phase of a project.
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Specific advice for Scotland
In Scotland, as part of the enabling legislation relating to the Water Framework Directive, the term 'sewer' was redefined to include SUDS. Through this, Scottish Water was made responsible for the future maintenance and capital replacement of shared public SUDS schemes. These changes were brought in through the enactment of stage 3 of the Water Environment and Water Services (Scotland) Act 2003. Scottish Water will now vest (adopt) detention ponds, basins and underground storage structures designed to attenuate surface water runoff. Sewers for Scotland 2nd Edition, 2007 now provides guidance on the design, operation, maintenance etc of Sustainable Drainage Systems. The Scottish Building Standards, section 3: Surface water drainage also contains specific advice.
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