Predicting Event-Based Sediment and Heavy Metal Loads in Untreated Urban Runoff from Impermeable Surfaces (2020)
Understanding the amount of pollutants contributed by impermeable urban surfaces during rain events is necessary for developing effective stormwater management. A process-based pollutant load model, named Modelled Estimates of Discharges for Urban Stormwater Assessments (MEDUSA), was further developed (MEDUSA2.0; Christchurch, New Zealand) to include simulations of dissolved metal loadings and improve total suspended solids (TSS) loading estimations. The model uses antecedent dry days, rainfall pH, average event intensity and duration to predict sediment and heavy metal loads generated by individual surfaces. The MEDUSA2.0 improvements provided a moderate to strong degree of fit to observed sediment, copper, and zinc loads for each modelled road and roof surface type. The individual surface-scale modelling performed by MEDUSA2.0 allows for identification of specific source areas of high pollution for targeted surface management within urban catchments
CitationCharters F, Cochrane T, O'Sullivan A (2020). Predicting Event-Based Sediment and Heavy Metal Loads in Untreated Urban Runoff from Impermeable Surfaces. Water. 12(4).
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KeywordsMEDUSA2.0; stormwater quality; total suspended solids; particulate and dissolved metals; rainfall characteristics
ANZSRC Fields of Research09 - Engineering::0905 - Civil Engineering::090508 - Water Quality Engineering
09 - Engineering::0905 - Civil Engineering::090509 - Water Resources Engineering
05 - Environmental Sciences::0502 - Environmental Science and Management::050206 - Environmental Monitoring
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Stormwater Contaminant Load Monitoring (2016) and Modelling of the Heathcote Catchment and Six Representative Subcatchments O'Sullivan AD; Cochrane TA; Charters F (University of Canterbury, 2017)Adverse effects from sediment and heavy metals have been observed in the Heathcote catchment, which is diverse in its land use activities. Stormwater management improvements are planned for the catchment through the Heathcote ...
Murphy, L.U.; O'Sullivan, A.; Cochrane, T.A. (University of Canterbury. Civil and Natural Resources Engineering, 2014)Atmospheric deposition is increasingly being recognised as a significant source of total suspended solids (TSS) and heavy metals in urban runoff. However, many uncertainties and challenges remain with measuring and managing ...
Charters, F.J.; Cochrane, T.A.; O'Sullivan, A.D. (University of Canterbury. Civil and Natural Resources Engineering, 2016)Sediment and heavy metals in stormwater runoff are key pollutants of urban waterways, and their presence in stormwater is driven by climatic factors such as rainfall intensity. This study describes the total suspended ...