An experimental study on the long-term water quality impacts of gravel media in storage underlying permeable pavements
Date
2009
Authors
Myers, B.R.
van Leeuwen, J.A.
Beecham, S.
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Conference paper
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WSUD09 : towards water sensitive cities and citizens, 2009, pp.1-8
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6th International Water Sensitive Urban Design Conference and Hydropolis #3 (5 May 2009 - 8 May 2009 : Perth, Australia)
Abstract
Permeable pavements are an established water sensitive urban design technology that can be used to capture and store runoff on site. This paper reports on a laboratory based investigation into the effects of storage in mineral aggregates of a permeable pavement system on physical water quality. Parameters measured included turbidity, conductivity, pH and alkalinity. The aggregate minerals considered were dolomite and quartzite, both sourced locally in Adelaide, Australia. Results of the study indicate that dolomite has a marked impact on water quality, particularly pH, conductivity and alkalinity. This is due to the dissolution of the dolomite material into aqueous solution with increasing detention time in the base course reservoir. The quartzite material had less influence on water quality. Quartzite and dolomite aggregates had similar impacts on turbidity. The significance of water quality changes through storage are discussed.
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Copyright 2009 Engineers Australia