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Water 2017, 9(5), 355; doi:10.3390/w9050355

Contamination of Detained Sediment in Sustainable Urban Drainage Systems

Water Academy, Heriot-Watt University, Edinburgh, EH144AS, UK
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Academic Editor: Thilo Hofmann
Received: 24 March 2017 / Revised: 13 May 2017 / Accepted: 16 May 2017 / Published: 18 May 2017
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Abstract

Adsorption is a key water pollution remediation measure used to achieve stormwater quality improvement in Sustainable urban Drainage Systems (SuDS). The level of contamination of detained sediment within SuDS assets is not well documented, with published investigations limited to specific contaminant occurrence in ponds, wetlands or infiltration devices (bioretention cells) and generally focused on solute or suspended sediment. Guidance on contamination threshold levels and potential deposited sediment contamination information is not included in current UK SuDS design or maintenance guidance, primarily due to a lack of evidence and understanding. There is a need to understand possible deposited sediment contamination levels in SuDS, specifically in relation to sediment removal maintenance activities and potential impact on receiving waterways of conveyed sediment. Thus, the objective of the research presented herein was to identify what major elements and trace metals were observable in (the investigated) SuDS assets detained sediment, the concentration of these major elements and trace metals and whether they met/surpassed ecotoxicity or contaminated land thresholds. The research presented here provides evidence of investigated SuDS sediment major element and trace metal levels to help inform guidance and maintenance needs, and presents a new methodology to identify the general cause (anthropocentric land use) and extent of detained SuDS fine urban sediment contamination through use of a contamination matrix. View Full-Text
Keywords: contamination factor; geoaccumulation index; sediment contamination; SuDS; urban contamination contamination factor; geoaccumulation index; sediment contamination; SuDS; urban contamination
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Allen, D.; Haynes, H.; Arthur, S. Contamination of Detained Sediment in Sustainable Urban Drainage Systems. Water 2017, 9, 355.

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