Confined Confined Water Sensitive Urban Design Water Sensitive Urban Design Stormwater Filtration/Infiltration Systems Stormwater Filtration/Infiltration Systems for for Australian Conditions Australian Conditions Alison Dunphy Alison Dunphy Institute for Water and Environmental Resource Institute for Water and Environmental Resource Simon Beecham Simon Beecham Management at the the University of Technology Sydney (UTS) University of Technology Sydney (UTS) Management at Colin Jones Colin Jones Kiama Municipal Council Kiama Municipal Council Anthony Collins Hornsby Shire Council Anthony Collins Hornsby Shire Council Mark Liebman Mark Liebman Storm Consulting Pty. Ltd. Storm Consulting Pty. Ltd. John Wells John Wells HydroCon Australasia Pty. Ltd. HydroCon Australasia Pty. Ltd. Paul Michael Paul Michael Residual Pty. Ltd. Residual Pty. Ltd. Dunphy et al Dunphy et al
Acknowledgments Acknowledgments � Australian Research Council (ARC) for Australian Research Council (ARC) for � project funding via Linkage Project grant project funding via Linkage Project grant (LP – – 0454374) 0454374) (LP � Rami Haddad and David Hooper Rami Haddad and David Hooper � (Faculty of Engineering, UTS) for (Faculty of Engineering, UTS) for assistance with installation of monitoring assistance with installation of monitoring equipment equipment Dunphy et al Dunphy et al
Presentation Summary Presentation Summary � Water Sensitive Urban Design (WSUD) Water Sensitive Urban Design (WSUD) � � Porous Pipe Stormwater Treatment Systems Porous Pipe Stormwater Treatment Systems � � Field Sites Field Sites � � Sampling Protocol Sampling Protocol � � Sampling Methods Sampling Methods � � Sample Results Sample Results � � Conclusions Conclusions � � Future Work Future Work � Dunphy et al Dunphy et al
Water Sensitive Urban Design (WSUD) Water Sensitive Urban Design (WSUD) WSUD has obvious benefits: WSUD has obvious benefits: � Sustainable approach to Sustainable approach to � managing the urban water cycle managing the urban water cycle � Minimising impact of Minimising impact of � urbanisation urbanisation � Treatment and/or harvesting Treatment and/or harvesting � of stormwater of stormwater � Provision of alternative water Provision of alternative water � supplies combined with measures supplies combined with measures to reduce potable water usage to reduce potable water usage from municipal supplies from municipal supplies Dunphy et al Dunphy et al
Porous Pipe Stormwater Porous Pipe Stormwater Treatment System Treatment System Maintenance Flushing Pit / Pipe Litter / HydroCon HydroCon Substrate Media Collection Pipes or Surrounding Soil / Groundwater Sediment Trap Cyclone Pit Pipe Material Pre-filtering HydroCon Components Filtration Monitoring / re-use / ground infiltration Dunphy et al Dunphy et al
Field Sites Field Sites Mills Park Tennis Centre, Weathertex Industrial Site Location Hindmarsh Park, Kiama Asquith Site, Heatherbrae commercial, residential & car park industrial Land Use/s parkland Catchment Area (m 2 ) 1600 2185 65000 Gravel / Sand / Filtration Media Gravel / Sand Sand Sand & GAC HydroCon Pipe Diameter 400 600 400 (mm) 100 18 32 Length of HydroCon Pipe (m) Infiltration/Filtration System Infiltration Infiltration Filtration Inlet: Automatic sampler Inlet: Automatic sampler Inlet: Automatic sampler Water Sampling Outlet: Half-pipe Outlet: Half-pipe Outlet: Automatic Set-up collection pipes collection pipes sampler Litter basket and precast Litter baskets and a Pre-filtering Litter baskets and screen sump pits prefiltering cyclone pit Receiving Location of Discharge to Ku-ring-gai Tomago Sandbeds Stormwater reuse for Treated Stormwater Chase National Park (drinking water acquifer) park irrigation Dunphy et al Dunphy et al
Hindmarsh Park, Hindmarsh Park, Kiama Kiama System during System during dry weather dry weather System surcharging System surcharging during wet weather during wet weather Dunphy et al Dunphy et al
Mills Park Tennis Mills Park Tennis Centre, Asquith Centre, Asquith System during System during � site selected for seeding of the filter media with site selected for seeding of the filter media with � construction construction nutrients, organic matter and microbial populations nutrients, organic matter and microbial populations � system flushed with treated effluent system flushed with treated effluent � Area upstream of Area upstream of the system the system Dunphy et al Dunphy et al
Weathertex Weathertex Industrial Site, Industrial Site, Heatherbrae Heatherbrae System during dry System during dry weather weather System during System during construction construction Dunphy et al Dunphy et al
Sampling Protocol Sampling Protocol � Detailed protocol developed Detailed protocol developed � � Quality assurance Quality assurance � Dunphy et al Dunphy et al
Sampling Methods Sampling Methods Automatic Samplers Automatic Samplers � � Half- -Pipe Collection System Pipe Collection System Half � � A line of slits are positioned along the invert of the half-pipe Half-Pipe Three-Quarter Pipe Cross- Cross -section section Dunphy et al Dunphy et al
Field Investigation Results Field Investigation Results Hindmarsh Park, Kiama Hindmarsh Park, Kiama � � 1.0 Relative Pollutant Concentration 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 F.COLI TKN TN pH TOC DOC TP SS TDS Zn Fe Analyte Inlet Outlet Dunphy et al Dunphy et al
Field Investigation Results Field Investigation Results Mills Park Tennis Centre, Asquith Mills Park Tennis Centre, Asquith � � - results indicate results indicate expected short expected short- -term increased term increased - nutrient, organic and suspended solid loads nutrient, organic and suspended solid loads Weathertex Industrial Site, Heatherbrae Weathertex Industrial Site, Heatherbrae � � - most recent system to be constructed most recent system to be constructed - - limited number of stormwater samples have been limited number of stormwater samples have been - collected collected - further collections are awaited before conclusions are further collections are awaited before conclusions are - drawn drawn Dunphy et al Dunphy et al
Laboratory Results Laboratory Results Experimental Investigation Experimental Investigation � � - preliminary laboratory tests were undertaken using preliminary laboratory tests were undertaken using - GAC to investigate its organic removal capabilities – – GAC to investigate its organic removal capabilities in- -press press in Batch Test 2 - DOC Concentration Variation With Time - Varying GAC Quantity 30 0.5g/L GAC (BT = 2) DOC Concentration (mg/L) 25 2g/L GAC (BT = 2) 20 15 10 5 0 0 5 10 15 20 25 Dunphy et al Dunphy et al Time (Hours)
Conclusions Conclusions � Fieldwork is ongoing, further samples are required to Fieldwork is ongoing, further samples are required to � validate the results validate the results � Results Results to date indicate the treatment system has to date indicate the treatment system has � the ability to reduce the concentration of pollutants the ability to reduce the concentration of pollutants � Expected short Expected short- -term effect of seeding a system with term effect of seeding a system with � tertiary treated effluent has been realised tertiary treated effluent has been realised Dunphy et al Dunphy et al
Future Work Future Work � Findings are part of a three Findings are part of a three- -year research project year research project � � Goal of project is to develop a model that is Goal of project is to develop a model that is � transferable to other sites transferable to other sites � Project is due to be completed by December 2006 Project is due to be completed by December 2006 � � Further field work is to take place Further field work is to take place � � Additional experimental work is to take place Additional experimental work is to take place � Dunphy et al Dunphy et al
Tak for din for din opmærksomhed opmærksomhed Tak Thank you for your attention Thank you for your attention Dunphy et al Dunphy et al
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