Long-Term Sodium Chloride Retention in a Rural Watershed: Legacy Effects of Road Salt on Streamwater Concentration

Sodium and chloride concentrations and export increased from 1986 to 2005 in a rural stream in southeastern New York. Concentrations increased 1.5 mg/L per year (chloride) and 0.9 mg/L per year (sodium), and export increased 33 000 kg/year (chloride) and 20 000 kg/year (sodium) during this period. W...

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Veröffentlicht in:Environmental science & technology 2008-01, Vol.42 (2), p.410-415
Hauptverfasser: Kelly, Victoria R, Lovett, Gary M, Weathers, Kathleen C, Findlay, Stuart E. G, Strayer, David L, Burns, David J, Likens, Gene E
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container_end_page 415
container_issue 2
container_start_page 410
container_title Environmental science & technology
container_volume 42
creator Kelly, Victoria R
Lovett, Gary M
Weathers, Kathleen C
Findlay, Stuart E. G
Strayer, David L
Burns, David J
Likens, Gene E
description Sodium and chloride concentrations and export increased from 1986 to 2005 in a rural stream in southeastern New York. Concentrations increased 1.5 mg/L per year (chloride) and 0.9 mg/L per year (sodium), and export increased 33 000 kg/year (chloride) and 20 000 kg/year (sodium) during this period. We estimate that salt used for deicing accounted for 91% of the sodium chloride input to the watershed, while sewage and water softeners accounted for less than 10% of the input. Road salt use in the watershed did not increase during the study, but sodium and chloride from sewage and water softeners is likely to have increased slightly due to a small increase in population. Increased input from sewage and water softeners cannot account for the increase in concentration and export from the watershed. Model results suggest that the increase in streamwater concentration and export was likely due to a lag effect of long-term road salt use and subsurface build-up.
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subjects Applied sciences
Chloride
Chlorides - analysis
Environmental Monitoring
Environmental Processes
Exact sciences and technology
Freshwater
Models, Theoretical
New York
Pollution
Rivers - chemistry
Salinity
Salt
Sodium
Sodium - analysis
Stream water
Water Pollutants, Chemical - analysis
Water Supply - analysis
Watershed management
Watersheds
title Long-Term Sodium Chloride Retention in a Rural Watershed: Legacy Effects of Road Salt on Streamwater Concentration
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