Origins of stream salinization in an upland New England watershed
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Salinity levels are above historical levels in many New England watersheds. We investigated potential sources of salinity in the Pemigewasset River, a relatively undeveloped watershed in northern New England. We utilized a synoptic sampling approach on six occasions between April and September 2011 paired with a novel land use analysis that incorporated traditional watershed and riparian zones as well as a local contributing area. We established background specific conductivity (SC) and found that SC was above established background levels in both the mainstem of the river (peak of 172 μS cm−1) and multiple tributaries. Specific conductivity was highest during low flow conditions (June) indicating potential groundwater storage and release of de-icing salts applied during winter months. Development in the watershed and riparian zone was found to be more strongly associated with elevated SC, compared to roads. The local contributing area was not found to be strongly associated with SC; however, there was evidence that the local contributing area may contribute to SC under low flow conditions.
KeywordsConductivity Land use Pollution transport Pollution storage Freshwater
The authors wish to acknowledge Kristin Brandt for field and lab contributions and Scott Bailey for reviews of methods and manuscript drafts. The quality of this manuscript has been improved through the comments of anonymous reviewers.
- Bailey AS, Hornbeck JW, Campbell JL, Eagar C. (2003). Hydrometeorological database for Hubbard Brook Experimental Forest: 1955–2000. US For Serv Gen Tech Rep; 305. Available: http://www.treesearch.fs.fed.us/pubs/5406. Accessed 6 February 2018.
- Campbell, J. L., Ollinger, S. V., Flerchinger, G. N., Wicklein, H., Hayhoe, K., & Bailey, A. S. (2010). Past and projected future changes in snowpack and soil frost at the Hubbard Brook experimental forest, New Hampshire, USA. Hydrological Processes, 24, 2465–2480.Google Scholar
- Campbell, J.L., Driscoll, C.T., Pourmokhtarian, A., Hayhoe, K. (2011). Streamflow responses to past and projected future changes in climate at the Hubbard Brook Experimental Forest, New Hampshire, United States. Water Resources Research, 47, W02514. https://doi.org/10.1029/2010WR009438.
- Cotton JE, Olimpio JR. (1996). Geohydrology, yield, and water quality of stratified-drift aquifers in the Pemigewasset River basin, central New Hampshire [Internet]. Report No.: 94–4083. Available: http://pubs.er.usgs.gov/publication/wri944083. Accessed 6 of February 2018.
- Harte, P. T., & Trowbridge, P. R. (2010). Mapping of road-salt-contaminated groundwater discharge and estimation of chloride load to a small stream in southern New Hampshire, USA. Hydrological Processes, 24, 2349–2368.Google Scholar
- Homer, C. G., Dewitz, J. A., Yang, L., Jin, S., Danielson, P., Xian, G., Coulston, J., Herold, N. D., Wickham, J. D., & Megown, K. (2015). Completion of the 2011 National Land Cover Database for the conterminous United States—representing a decade of land cover change information. Photogrammetric Engineering and Remote Sensing, 81(5), 345–354.Google Scholar
- Howard, K. W., & Haynes, J. (1993). Groundwater contamination due to road de-icing chemical-salt balance implications. Geoscience Canada., 20(1), 1–8.Google Scholar
- Kaushal, S. S., Groffman, P. M., Likens, G. E., Belt, K. T., Stack, W. P., Kelly, V. R., Band, L. E., & Fisher, G. T. (2005). Increased salinization of fresh water in the northeastern United States. Proceedings of the National Academy of Sciences of the United States of America, 102(38), 13517–13520.CrossRefGoogle Scholar
- Kelly, V. R., Lovett, G. M., Weathers, K. C., Findlay, S. E. G., Strayer, D. L., Burns, D. J., & Likens, G. E. (2008). Long-term sodium chloride retention in a rural watershed: legacy effects of road salt on streamwater concentration. Environmental Science and Technology, 42(2), 410–415.CrossRefGoogle Scholar
- NHDOT (2013). New Hampshire Department of Transportation. NH Public Roads (GIS Shapefile). Available at http://www.granit.unh.edu/data/downloadfreedata/category/databycategory.html
- USEPA (2006). U.S. Environmental Protection Agency. National recommended water quality criteria. 4304T. https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table. Accessed 9 August 2018.
- USEPA (2018). U.S. Environmental Protection Agency. Secondary drinking water standards: guidance for nuisance chemicals. https://www.epa.gov/dwstandardsregulations/secondary-drinking-water-standards-guidance-nuisance-chemicals. Accessed 19 January 2018.
- USGS (2009). U.S. Geological Survey. National elevation dataset (NED) (1/3 arc second—10 meter resolution). https://viewer.nationalmap.gov/advanced-viewer/. Accessed 19 January 2018.
- USGS (2016). U.S. Geologic Survey. Daily data. https://waterdata.usgs.gov/nwis/dv/?referred_module=sw. Accessed 19 January 2018.
- Williams, W. (1987). Salinization of rivers and streams: an important environmental hazard. Ambio Ambocx, 16(4), 180–185.Google Scholar