Saltwater intrusion in coastal regions of North America

@article{Barlow2010SaltwaterII,
  title={Saltwater intrusion in coastal regions of North America},
  author={Paul M. Barlow and Eric G. Reichard},
  journal={Hydrogeology Journal},
  year={2010},
  volume={18},
  pages={247-260}
}
Saltwater has intruded into many of the coastal aquifers of the United States, Mexico, and Canada, but the extent of saltwater intrusion varies widely among localities and hydrogeologic settings. In many instances, the area contaminated by saltwater is limited to small parts of an aquifer and to specific wells and has had little or no effect on overall groundwater supplies; in other instances, saltwater contamination is of regional extent and has resulted in the closure of many groundwater… 
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