Encyclopedia of Engineering Geology

2018 Edition
| Editors: Peter T. Bobrowsky, Brian Marker


  • Carlo Percopo
  • Maurizio GuerraEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-73568-9_150


Subsurface waters can be divided into two categories (Fig. 1): (i) water in the unsaturated or vadose zone and (ii) water below the water table, occurring in the saturated or phreatic zone. The term “ groundwater” traditionally refers to the latter.
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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Ministry of the Environment and the Protection of Land and SeaRomeItaly
  2. 2.Department Geological Survey of ItalyISPRA, Italian National Institute for Environmental Protection and ResearchRomeItaly