Abstract
ABSTRACTIt is necessary to understand Sustainable urban Drainage Systems (SuDS) sediment retention efficiencies to fully comprehend SuDS pollution removal properties and urban sediment movement from source-to sink. This research presents the detention and transport of a single tagged sediment release through four SuDS devices over 12 months, with the aim of quasi-quantifying these selected SuDS devices sediment detention efficiencies. Field monitoring and mass balance analysis of deposited sediment shows that tagged sediment from the single sediment release moves through the monitored SuDS, with deposition declining over the 12-month monitoring period. Initial retention is high (>80% during the first week of monitoring) but falls below 80% after multiple consecutive rainfall-runoff events (events ≤50% ARI). The field monitoring illustrates retention to generally remain above 50%, suggesting that SuDS are highly efficient at retaining urban sediment pollution but that deposition of a single sediment release may resuspend due to cumulative rainfall-runoff events.
Highlights
Field or physically based studies often consider the deposition and retention of sediment within Sustainable urban Drainage Systems (SuDS) devices over multiple rainfall-runoff events (International BMP database, 2016)
This study aims to supplement this dataset by providing a single sediment release deposition trend through field monitored SuDS
A fine sediment tracer methodology using rare earth oxides (REO) was employed at selected established SuDS device field sites to allow the natural movement of urban sediment to be recorded in conjunction with rainfall, flow characteristics and mass deposition within monitored SuDS
Summary
Field or physically based studies often consider the deposition and retention of sediment within Sustainable urban Drainage Systems (SuDS) devices over multiple rainfall-runoff events (International BMP database, 2016). Fewer studies have analysed or quantified the cumulative, sequential rainfall-runoff influence on the deposition of a single release of urban sediment within SuDS devices. Published studies consider urban sediment deposition in ponds and wetlands with perennial flow (Krishnappan and Marsalek 2002; Heal 2000; Heal, Hepburn, and Lunn 2006; McNett and Hunt 2011; Merriman and Hunt 2014; Yousef et al 1994) while others The retention and conveyance of an individual (i.e. tagged) sediment release over cumulative, multiple, sequential rainfall-runoff flows have been less frequently calculated due to the difficulty in defining the quantity of sediment deposited and retained form individual sediment influx events The retention and conveyance of an individual (i.e. tagged) sediment release over cumulative, multiple, sequential rainfall-runoff flows have been less frequently calculated due to the difficulty in defining the quantity of sediment deposited and retained form individual sediment influx events (e.g. Merriman and Hunt 2014; Allen 2017)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
