Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale
AbstractWinter road network management is a source of anthropogenic salinity in the Saint-Augustin Lake watershed (Quebec City, QC, Canada). To prevent the potential impact caused by road runoff involving de-icing salts (NaCl) and trace metals (Cd and Pb) on the watershed, a full-scale treatment chain system (including a detention basin, a filtering bed, and a constructed wetland) was built. Average Cl and Na concentrations in groundwater were higher in wells affected by road network (125 mg/L Cl and 64 mg/L Na) than in control wells (13 mg/L Cl and 33 mg/L Na) suggesting a contamination by de-icing salts. The monitoring of influent and effluent surface water in the treatment system has shown a seasonal dependence in NaCl concentrations and electrical conductivity values, being the highest in summer, linked with the lower precipitation and higher temperature. Concentration ranges were as follows: 114–846 mg/L Na and 158–1757 mg/L Cl (summer) > 61–559 mg/L Na and 63–799 mg/L Cl (spring and autumn). The treatment system removal efficiency was significant, however with seasonal variations: 16%–20% Cl, 3%–25% Na, 7%–10% Cd and 7%–36% Pb. The treatment system has shown an interesting potential to mitigate the impact of anthropogenic salinity at watershed scale with higher expected performances in the subsequent years of operation. View Full-Text
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Guesdon, G.; de Santiago-Martín, A.; Raymond, S.; Messaoud, H.; Michaux, A.; Roy, S.; Galvez, R. Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale. Water 2016, 8, 285.
Guesdon G, de Santiago-Martín A, Raymond S, Messaoud H, Michaux A, Roy S, Galvez R. Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale. Water. 2016; 8(7):285.Chicago/Turabian Style
Guesdon, Gaëlle; de Santiago-Martín, Ana; Raymond, Sébastien; Messaoud, Hamdi; Michaux, Arthur; Roy, Samuel; Galvez, Rosa. 2016. "Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale." Water 8, no. 7: 285.
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