Comparison of stormwater quality metal impacts from residential, commercial, and industrial catchment areas in Grande Prairie
De Vries, Kase Benjamin
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SubjectBiological sciences; Health and environmental sciences; Land use; Metals; Stormwater; Stormwater quality; Urban runoff
Non-point source pollution from stormwater runoff is a growing issue for global surface water sustainability. Baseline water quality data from Bear Creek indicate metal contamination increases as the stream flows through the City of Grande Prairie in northwest Alberta. This research measured metal concentrations entering Bear Creek from six stormwater catchments to compare if and how different land uses affect metal contamination. Water quality and quantity data were analyzed and determined that heavy industrial land uses contribute more significant metal concentrations in stormwater discharge than light industrial, residential, or commercial areas. These results, along with analysis of development characteristics, suggest that mitigation should focus on industrial catchments that feature gravel land cover. It is recommended that the City implement engineered controls such as wet ponds and administrative controls such as frequent street cleaning in industrial areas with gravel land cover to reduce non-point source metal pollution entering Bear Creek.
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