Evidence of traffic-related pollutant control in soil-based Sustainable Urban Drainage Systems (SUDS)

摘要

SUDS are being increasingly employed to control highway runoff and have the potential to protectngroundwater and surface water quality by minimising the risks of both point and diffuse sourcesnof pollution. While these systems are effective at retaining polluted solids by filtration andnsedimentation processes, less is known of the detail of pollutant behaviour within SUDSnstructures. This paper reports on investigations carried out as part of a co-ordinated programmenof controlled studies and field measurements at soft-engineered SUDS undertaken in the UK,nobserving the accumulation and behaviour of traffic-related heavy metals, oil and PAHs. The fieldndata presented were collected from two extended detention basins serving the M74 motorway innthe south-west of Scotland. Additional data were supplied from an experimental lysimeter soilncore leaching study. Results show that basin design influences pollutant accumulation andnbehaviour in the basins. Management and/or control strategies are discussed for reducing thenimpact of traffic-related pollutants on the aqueous environment.