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A New Rapid Method for Measuring the Vertical Head Profile.

Carl Keller1

  • 1FLUTe, P.O. Box #340, Alcalde, NM, 87511 USA.

Ground Water
|September 3, 2016
PubMed
Summary
This summary is machine-generated.

A new technique rapidly measures hydraulic head in geologic formations, identifying water zones and aquitards. This method aids in understanding aquifer systems and preventing cross-contamination in boreholes.

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Area of Science:

  • Hydrogeology
  • Geophysical well logging
  • Aquifer characterization

Background:

  • Accurate measurement of hydraulic head is crucial for understanding groundwater flow in heterogeneous aquifers.
  • Existing methods for profiling hydraulic heads in boreholes can be time-consuming and costly.
  • Characterizing water-producing zones and aquitards requires detailed information on head distribution.

Purpose of the Study:

  • To introduce and validate a novel, rapid, and cost-effective technique for measuring head profiles in geologic formations.
  • To assess the capability of the new method in identifying water-producing zones and aquitards within heterogeneous aquifers.
  • To evaluate the potential of the technique for detecting cross-contamination risks between different hydrogeologic zones.

Main Methods:

  • The study utilizes a flexible borehole liner installed (eversion) and removed (inversion) from an open borehole to obtain a continuous transmissivity profile.
  • The reverse head profile (RHP) method, based on stepwise liner inversion, measures hydraulic heads in discrete zones.
  • Steady-state head equilibration beneath the liner is allowed as each borehole interval is uncovered during inversion.

Main Results:

  • The technique provides rapid, low-cost information on water-producing zones and aquitards.
  • Estimates of hydraulic heads in individual zones were successfully obtained.
  • The RHP method in a New Jersey borehole reproduced head distribution data from a multilevel sampling system.

Conclusions:

  • The described technique offers an efficient approach for characterizing hydraulic head distributions in boreholes.
  • The method is effective in heterogeneous aquifers, providing insights into zone-specific heads and potential contamination pathways.
  • The RHP method demonstrates practical applicability and accuracy comparable to established systems.