Encyclopedia of Engineering Geology

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

Piezometer

  • Michael de FreitasEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-73568-9_220

Definition

A pressure meter used to measure groundwater pressure at a point in the ground allowing it to be quantified and, from that, the pressure head (see Equipotential Lines) and pore pressure to be calculated.

The simplest piezometer is a tube (piezo-tube) on the end of which is a perforated section (piezo-tip). The tube and its tip are lowered into a borehole whose location has already been selected on the basis of either the likely pattern of groundwater flow or the need to know pore pressure at that location. The tip is placed at an elevation in the hole where a measurement of pressure is required; this elevation is normally chosen on the basis of the geology penetrated and pattern of flow expected. The tip is then surrounded by granular material which serves three purposes: (i) to prevent the ground around the tip from collapsing into the annulus between the tip and the borehole wall and in so doing possibly creating pathways in the surrounding ground which connect that point...

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References

  1. Hvorslev MJ (1951) Time lag and soil permeability in ground-water observations Bull No 36. U.S. Army Waterways Experiment Station, Vicksburg, MS, USAGoogle Scholar
  2. McKenna GT (1995) Grouted-in installation of piezometers in boreholes. Can Geotech J 32(2):355–363.  https://doi.org/10.1139/t95-035

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Imperial College LondonLondonUK
  2. 2.Reader Emeritus in Engineering GeologyFirst Steps Ltd.UK