Stormwater particles and their sampling using passive devices

Paper

Brodie, Ian. 2005. "Stormwater particles and their sampling using passive devices." 10th International Conference on Urban Drainage (ICUD 2005). Copenhagen, Denmark 21 - 26 Aug 2005 Lyngby, Denmark.
Paper/Presentation Title

Stormwater particles and their sampling using passive devices

Presentation TypePaper
Authors
AuthorBrodie, Ian
Journal or Proceedings TitleProceedings of the 10th International Conference on Urban Drainage (ICUD 2005)
Number of Pages8
Year2005
Place of PublicationLyngby, Denmark
ISBN8789220803
Web Address (URL) of Paperhttp://10icud.er.dtu.dk/
Conference/Event10th International Conference on Urban Drainage (ICUD 2005)
Event Details
10th International Conference on Urban Drainage (ICUD 2005)
Parent
International Conference on Urban Drainage
Delivery
In person
Event Date
21 to end of 26 Aug 2005
Event Location
Copenhagen, Denmark
Abstract

[Abstract]: Total Suspended Solids (TSS) is commonly used as a measure of particle concentration in stormwater. The breakdown of TSS into subgroups based on particle size is an important step in describing stormwater characteristics. A simple classification system is proposed that divides solids into four size ranges; Very Fine (VFPs, <8μm), Fine (FPs, 8-63μm), Medium (MPs, 63-500μm) and Coarse Particles (CPs, >500μm).

The use of passive samplers to obtain unbiased, flow-weighted samples of non-Coarse particles was investigated. Two alternative passive samplers referred to as a flow splitter and an orifice and weir device were designed, constructed and tested. The flow splitter outperformed the orifice and weir device in terms of sampling accuracy. Based on hydraulic testing up to 5 L/s, the flow splitter was able to accurately (±2% error) obtain a constant sample volume: flow volume ratio compared to a ±15% error for the orifice and weir. Based on sediment testing, the performance of the flow splitter in obtaining VFP and FP samples was similar to that of high frequency grab sampling. Samples collected by the flow splitter matched theoretical concentrations of particles less than 63μm to within ±2% error. All sampling methods significantly underestimated the concentration of particles greater than 63μm (MPs) and more research is needed in this area. Overall, the flow splitter is considered to have significant potential for determining the Event Mean Concentration of stormwater particles.

KeywordsEvent Mean Concentration, passive samplers, stormwater monitoring, suspended solids
ANZSRC Field of Research 2020400499. Chemical engineering not elsewhere classified
400513. Water resources engineering
Public Notes

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Byline AffiliationsDepartment of Agricultural, Civil and Environmental Engineering
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