Stormwater particles and their sampling using passive devices

Brodie, Ian (2005) Stormwater particles and their sampling using passive devices. In: 10th International Conference on Urban Drainage, 21-26 Aug 2005, Copenhagen, Denmark.

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[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.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: No evidence of copyright restrictions on web site . Abstracts published at ; ISBN 87-89220-80-3. Full papers were not published.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 12 Nov 2007 05:48
Last Modified: 13 Jun 2016 02:10
Uncontrolled Keywords: Event Mean Concentration, passive samplers, stormwater monitoring, suspended solids
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090508 Water Quality Engineering
09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering

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