PMID: 18200878Jan 19, 2008Paper

Probe for measuring groundwater velocity at the centimeter scale

Environmental Science & Technology
W LabakyR W Gillham

Abstract

A novel method of measuring small-scale groundwater velocities in unconsolidated noncohesive media uses the travel time of a tracer pulse between an injection port and two detectors located on the surface of a cylindrical probe, called a point-velocity probe (PVP), as the basis for velocity estimation. The direction and magnitude of the water velocity vector were determined to within +/- 9% of magnitude and +/- 8 in direction, on average, in ten laboratory tank tests conducted with the PVP, when the velocities were between 5 and 98 cm/ day. Numerical simulations supported the accuracy of the underlying theory for interpretation of the PVP data and indicated that the technology is capable of measuring velocity at a very fine scale (0.5 cm around the circumference). The benchtop and modeling investigations indicated that the probe is moderately sensitive to the condition of the porous medium immediately next to the cylinder surface, suggesting that challenges exist for the deployment of the instrument in the field.

References

Oct 16, 1999·Journal of Hazardous Materials·A R Gavaskar
May 12, 2001·Environmental Science & Technology·S YabusakiC Steefel
Jan 5, 2002·Environmental Science & Technology·S D Abadzic, J N Ryan
Jan 19, 2002·Ground Water·James J ButlerSteven P Loheide
Feb 25, 2005·Ground Water·Yousheng Zhang, Robert W Gillham
Apr 12, 2005·Ground Water·G M Zemansky, C D McElwee
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Jan 30, 2007·Ground Water·J F Devlin, C D McElwee

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Citations

Sep 6, 2011·Journal of Contaminant Hydrology·J F DevlinJ A Roberts
Mar 31, 2011·Ground Water·P C SchilligM A McGlashan
Aug 19, 2010·Journal of Contaminant Hydrology·Bradley M PattersonAndrew J Furness
Aug 15, 2018·Ground Water·Martí Bayer-RaichMatthieu Grossemy
Feb 19, 2015·Ground Water·James M McDadeJulia M Small
Feb 6, 2021·Journal of Contaminant Hydrology·Allison CormicanCraig Divine

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