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1st June 2012

Natural flood management (NFM) knowledge system: Sustainable urban drainage systems (SUDS) and flood management in urban areas

This report, one of three reports produced for CREW to verify the current state of knowledge on NFM, focuses on establishing the effectiveness of SUDS measures for flood management in urban areas, particularly in relation to performance under saturation conditions and long term efficiency as a device becomes established. Although it is explicitly recognised that SUDS can also deliver water quality and amenity benefits, this report focuses only on runoff detention and retention. In particular this report examines the performance of devices with high or moderate potential for runoff volume reduction in detail (green roofs, rainwater harvesting, pervious paving, infiltration devices and swales), reviewing the available evidence relating to the impact that these different SUDS measures have on managing flood scenarios.