| Autor: |
Cartwright, Lyndsay, Moslenko, Luke, Chin, Andrew, Chomicki, Krista M., Van Seters, Tim, Des Vignes, Garrett, Harvey, Chad, Ruppert, Jonathan, Erich, Nikola, Sidow, Suad, Bastow, Russell, Antonyshyn, Sophie, Ivanov, Alexander, Campos, Joao Pedro, Oswald, Claire |
| Předmět: |
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| Zdroj: |
Annual Conference on Great Lakes Research Abstract Book; 2023, Vol. 66, p36-37, 2p |
| Abstrakt: |
Increasing chloride concentrations in freshwater streams in the Toronto region and throughout many areas of North America have led to concerns over freshwater salinization of both surface water and groundwater. We identified trends in chloride concentrations at 47 stream monitoring stations between 2000 and 2021 within the Toronto region and identified factors contributing to trends. Chloride concentrations increased significantly at 36 of 47 stream monitoring stations with 24 stations showing increasing trends during the winter (salting) season and 30 stations showing increasing trends during the summer (non-salting) season. Chloride-to-bromide ratios indicated that road salt and/or septic effluent was the dominant source of chloride; however, basin brines and/or animal waste, precipitation, or pristine aquifers also contributed chloride. Inputs varied by season with road salt and/or septic effluent having a higher proportion of inputs during winter compared to summer where a higher proportion of inputs were from basin brines and/or animal waste, landfill leachate, and pristine aquifer. Land use within catchments was related to chloride concentrations with trends in road density positively related to trends in chloride. These results suggest that while land use factors are a significant predictor of trends in stream chloride, several other factors are likely contributing to increasing stream chloride concentrations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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