Abstract
The chloride concentrations of urban lakes where road de-icing salt (NaCl) is used have increased to levels that can change natural lake-mixing behavior and influence aquatic life. A zero-dimensional model was formulated to project the long-term accumulation of chloride in urban lakes receiving runoff from roads on which road salt is applied. Four model parameters and an initial concentration were obtained by calibrating the model with 5 years (2004–2008) of monthly salinity data from seven lakes in the Minneapolis/St. Paul Twin Cities Metropolitan Area of Minnesota, USA. Three of the seven lakes appear headed towards year-round volume averaged chloride concentrations above the 230-mg/L chronic standard for impairment to aquatic habitat. The two lakes with the lowest projected equilibrium concentrations of chloride have already reached equilibrium. One lake is projected to take an additional 40 years to reach equilibrium under current climate conditions and current road salt application rates. If road salt application rates are reduced in future winters, it is projected that the lakes will respond with noticeably lower chloride concentrations within 5 to 10 years. If road salt applications are discontinued altogether, chloride concentrations are projected to drop to natural levels within 10 to 30 years in all seven lakes. A reduction of application rates by 50% would result in annual volumetric average chloride concentrations below the chronic standard.
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Birge, W. J., Black, J. A., Westerman, A. G., Short, T. M., Taylor, S. B., Bruser, D. M., et al. (1985). Recommendations on numerical values for regulating iron and chloride concentrations for the purpose of protecting warm water species of aquatic life in the Commonwealth of Kentucky. Memorandum of Agreement No. 5429 (p. 70). Lexington: Kentucky Natural Resources and Environmental Protection Cabinet.
Bridgeman, T. B., Wallace, C. D., Carter, G. S., Carvajal, R., Schiesari, L. C., Aslam, S., et al. (2000). A limnological survey of Third Sister Lake, Michigan with historical comparisons. Journal of Lake and Reservoir Management, 16, 253–267.
Bubeck, R. C., & Burton, R. S. (1989). Changes in chloride concentrations, mixing patterns, and stratification characteristics of Irondequoit Bay, Monroe County, New York, after decreased use of road-deicing salts, 1974–84. Water Resources Investigation Report 87–4223. Reston: US Geological Survey.
Chapra, S. C. (1978). Total phosphorus model for the Great Lakes. Journal of Environmental Engineering Division American Society of Civil Engineers, 103, 147–161.
Chapra, S. C., & Tarapchak, S. J. (1976). A chlorophyll-a model and its relationship to phosphorus loading plots for lakes. Water Resources Research, 12(6), 1260–1264.
Dillon, P. J., & Rigler, F. H. (1974). A test of a simple nutrient budget model for predicting the phosphorus concentration in lake water. Journal of the Fisheries Research Board of Canada, 31, 1771–1778.
Dixit, S. S., Smol, J. P., Charles, D. F., Hughes, R. M., Paulsen, S. G., & Ollins, G. B. (1999). Assessing water quality changes in the lakes of the northeastern United States using sediment diatoms. Canadian Journal of Fisheries and Aquatic Sciences, 56, 131–152.
Environment Canada, Health Canada (ECHC) (1999). Environment Protection Act 1999. Ottawa: Priority substances list assessment report—road salt.
Evans, M., & Frick C. (2001). The effects of road salts on aquatic ecosystems. National Water Research Institute, Environment Canada, Ottawa, Canada Contribution Series No. 02–308, August 2001.
Karl, T. R., & Knight, R. W. (1998). Secular trends of precipitation amount, frequency, and intensity in the USA. Bulletin of the American Meteorological Society, 79, 231–241.
Metropolitan Council of the Twin Cities area (2009). http://www.metrocouncil.org/metroarea/RDFforecasts.pdf. 23 March 2008.
Middlebrooks, E. J., Falkenborg, D. H., & Maloney, T. E. (eds). (1974). Modeling the eutrophication process. Ann Arbor: Ann Arbor Science.
Novotny, E. V., Murphy, D., & Stefan, H. G. (2007). Road salt effects on the water quality of lakes in the Minneapolis/St. Paul metropolitan area (pp. 47). Proj. Rep. No. 505, St. Anthony Falls Laboratory, University of Minnesota, Minnesota, Dec. 2007.
Novotny, E. V., Murphy, D., & Stefan, H. G. (2008). Increase of urban lake salinity by road deicing salt. Science of the Total Environment, 406, 131–144.
Novotny, E. V., Sander, A., Mohseni, O., & Stefan, H. G. (2009). Chloride ion transport and mass balance in a metropolitan area using road salt. Water Resources Research, 45(12), 2009.
Ramstack, J. M., Fritz, S. C., Engstrom, D. R., & Heiskary, S. A. (2003). The application of a diatom-based transfer functions to evaluate regional water-quality trends in Minnesota since 1970. Journal of Paleolimnology, 29, 79–94.
Ramstack, J. M., Fritz, S. C., & Engstrom, D. R. (2004). Twentieth century water quality trends in Minnesota lakes compared with pre-settlement variability. Canadian Journal of Fisheries and Aquatic Sciences, 61, 561–576.
Rosenberry, D. O., Bukaveckas, P. A., Buso, D. C., Likens, G. E., Shapiro, A. M., & Winter, T. C. (1999). Movement of road salt to a small New Hampshire lake. Water, Air, and Soil Pollution, 109, 179–206.
Sanzo, D., & Hecnar, S. J. (2006). Effects of road de-icing salt (NaCl) on larval wood frogs (Rana sylvatica). Environmental Pollution, 140, 247–256.
Scott, W. S. (1979). Road de-icing salts in an urban stream and flood control reservoir. Water Resources Bulletin, 15, 1733–7174.
Seeley, M. (2003). Climate trends: what are some implications for Minnesota's air and water resources? Minnesota MPCA presentation St. Paul, MN, 18 Nov 2003 http://www.pca.state.mn.us/air/pubs/climatechange-seeley1103.pdf.
Sonzogni, W. C. (1976). A phosphorus residence time model: theory and application. Water Resources, 10, 429–435.
Sonzogni, W. C., Chapra, S. C., Armstrong, D. E., & Logan, T. J. (1982). Bioavailability of phosphorus inputs to lakes. Journal of Environmental Quality, 11, 555–563.
Stefan, H. G. (1994). Lake and reservoir eutrophication: prediction and protection. In M. Hino (Ed.), Chap. 2 in Water Quality and its Control (pp. 45–76). Rotterdam: Balkema Publ.
Thunqvist, E. L. (2003). Increased chloride concentration in a lake due to deicing salt application. Water Science and Technology, 48, 51–59.
Tuchman, M. L., Eugene, S. F., & Carney, H. J. (1984). Effects of increased salinity on the diatom assemblage in Fonda Lake, Michigan. Hydrobiologia, 109, 179–188.
Vollenweider, R. A. (1975). Input-output models with special reference to the phosphorus loading concept in limnology. Schweizer Zeitschrift für Hydrologie, 37, 58–83.
Vollenweider, R. A. (1976). Advances in defining critical loading levels for phosphorus in lake eutrophication. Mem Ist Ital Idrobiol, 33, 53–83.
Acknowledgments
Funding for the project, especially the data collection, was provided by the Local Road Research Board, St. Paul, MN, USA, and the James L. Record Fund, University of Minnesota. The University of Minnesota provided a Doctoral Dissertation Fellowship for the senior author.
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Novotny, E.V., Stefan, H.G. Projections of Chloride Concentrations in Urban Lakes Receiving Road De-icing Salt. Water Air Soil Pollut 211, 261–271 (2010). https://doi.org/10.1007/s11270-009-0297-0
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DOI: https://doi.org/10.1007/s11270-009-0297-0