2019 CSCE Annual Conference - Laval (Greater Montreal) Conference
Dr. Kerry McPhedran, University of Saskatchewan
Mr. Scott Read, University of Saskatchewan
Anthropogenic activities in urban areas change the natural environment often removing pervious surfaces and putting impervious surfaces in their place. Impervious surfaces collect waste and pollutants that are then washed away during storm events and these stormwaters, which are a form of municipal wastewater, are often directed into receiving waterbodies without treatment. Thus, stormwater is a source of large quantities of contaminants such as solids, organic matter, nutrients, metals, PAHs and others into receiving waters. However, despite having negative impacts on receiving water bodies, stormwater impacts are less studied and understood in comparison to municipal sewage wastewaters. The current study will examine the potential impacts of the City of Saskatoon’s (COS) stormwater on the south Saskatchewan river (SSR). For this purpose, monthly river water was sampled including three upstream and three downstream sights of COS during summer 2018. In addition, stormwater outfall samples were taken at 7 outfalls representing 40% of the COS surface area. The collected samples were examined to determine total suspended solids (TSS), total dissolved solids (TDS), electrical conductivity (EC), chemical oxygen demand (COD), biochemical oxygen demand (BOD), metals (Fe, Pb, Zn, Cu, Cr, Ni, Cd, Hg) and polyaromatic hydrocarbons (PAHs). The results of these parameters will be analyzed and compared to determine the impacts of COS’s stormwater runoff into SSR. These results will be useful for the development of future treatment technologies for these stormwaters to help protect human and environmental health.