9Structural Controls - Department of Water - The Western Australian ...

Determine the emptying time (T):
T = 4750 seconds
T = 1 hour 19 minutes
The emptying time is less than the maximum acceptable emptying time of a 2 year ARI event, therefore the
design of the crate infiltration trench is suitable.
Given that both the gravel filled and crate system infiltration trenches emptied within an acceptable time, a
crate system is selected for this site as it requires a smaller plan area.
References and further reading
Agriculture Western Australia 1998, Soilguide: a handbook for understanding and managing agricultural
soils, Bulletin No 4343, Agriculture Western Australia, Perth, Western Australia.
Argue, J. R. (Editor) 2004, Water Sensitive Urban Design: basic procedures for ‘source control’ of
stormwater – a handbook for Australian practice, Urban Water Resources Centre, University of
South Australia, Adelaide, South Australia, in collaboration with Stormwater Industry Association and
Australian Water Association.
Center for Watershed Protection 1998, Costs and Benefits of Storm Water BMPs: final report 9/14/98,
Center for Watershed Protection, Ellicott City, Maryland; not seen, cited in Taylor 2005.
Department of Environment and Swan River Trust 2005, Decision Process for Stormwater Management in
Western Australia, Department of Environment and Swan River Trust, Perth, Western Australia.
Engineers Australia 2006, Australian Runoff Quality – a guide to water sensitive urban design, Wong, T. H.
F. (Editor-in-Chief), Engineers Media, Crows Nest, New South Wales.
Fletcher, T.D., Duncan, H.P., Poelsma, P. and Lloyd, S.D. 2003, Stormwater Flow, Quality and Treatment:
literature review, gap analysis and recommendations report, NSW Environmental Protection Authority
and Institute for Sustainable Water Resources, Department of Civil Engineering, Monash University,
Melbourne, Victoria.
Institution of Engineers Australia 2001, Australian Rainfall and Runoff, Volume One, a guide to flood
estimation, Pilgrim, D.H. (Editor-in-Chief), Institution of Engineers Australia, Barton, Australian Capital
Territory.
Taylor, A.C. 2005, Structural Stormwater Quality BMP Cost/Size Relationship Information from the
Literature (Version 3), Cooperative Research Centre for Catchment Hydrology, Melbourne, Victoria.
Washington Aggregates & Concrete Association 2006, Washington Aggregates & Concrete Association.
Available via .
74 Stormwater Management Manual for Western Australia: Structural Controls