Articles | Volume 23, issue 3
https://doi.org/10.5194/hess-23-1355-2019
https://doi.org/10.5194/hess-23-1355-2019
Research article
 | 
11 Mar 2019
Research article |  | 11 Mar 2019

Sources and fate of nitrate in groundwater at agricultural operations overlying glacial sediments

Sarah A. Bourke, Mike Iwanyshyn, Jacqueline Kohn, and M. Jim Hendry

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Cited articles

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Ascott, M. J., Gooddy, D. C., Wang, L., Stuart, M. E., Lewis, M. A., Ward, R. S., and Binley, A. M.: Global patterns of nitrate storage in the vadose zone, Nat. Commun., 8, 1416, https://doi.org/10.1038/s41467-017-01321-w, 2017. 
Baily, A., Rock, L., Watson, C., and Fenton, O.: Spatial and temporal variations in groundwater nitrate at an intensive dairy farm in south-east Ireland: Insights from stable isotope data, Agr. Ecosyst. Environ., 144, 308–318, 2011. 
Baram, S., Kurtzman, D., and Dahan, O.: Water percolation through a clayey vadose zone, J. Hydrol., 424–425, 165–171, https://doi.org/10.1016/j.jhydrol.2011.12.040, 2012. 
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Short summary
Agricultural operations can result in nitrate contamination of groundwater, lakes and streams. At two confined feeding operations in Alberta, Canada, nitrate in groundwater from temporary manure piles and pens exceeded nitrate from earthen manure storages. Identified denitrification reduced agriculturally derived nitrate concentrations in groundwater by at least half. Infiltration to groundwater systems where nitrate can be naturally attenuated is likely preferable to off-farm export via runoff.