Evidence details

rebecca.killalea@canberra.edu.au on 16 Mar 2022

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Citation: Wei, Z., Simin, L., & Fengbing, T. (2013). Characterization of Urban Runoff Pollution between Dissolved and Particulate Phases. The Scientific World Journal.
Study description: This study investigated the proportion of nitrogen, phosphorus and solids in particulate and dissolved phases in urban stormwater runoff from roof and road catchments. The study characterised the dissolved pollutant as a percentage of the total pollutants. The study also looked at correlation between pollutants in different phases.

Cause term/trajectory: Water quality - oxygen (Change)
Cause description: Dissolved chemical oxygen demand (DCOD)
Effect term/trajectory: Water quality - nutrients (nitrogen) (Change)
Effect description: Dissolved total nitrogen (DTN). The study showed that DCOD was strongly correlated with dissolved total nitrogen in roof runoff (r=0.859)but not in road runoff (r=0.260).
Response measure type: Pearson correlation coefficient
Statistical significance: r=0.859 for roofs, r=0.260 for roads

Source data: Field
Study type: Observation
Study design: Temporal gradient
Number of independent control or reference sampling units: 5
Number of indendent impact or treatment sampling units: 5 sites- 2 roads and 3 roofs
Sample size used in analysis: 60 (12 rainfall events sampled simultaneously at 5 locations)
Design description: Samples taken at time intervals during rainfall events.