The development and influence of gas bubbles in phreatic aquifers under natural flow conditions

Daniel Ronen, Brian Berkowitz, Mordeckai Magaritz

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

In a phreatic aquifer, bubbles may result from the entrapment of air during groundwater recharge and/or bacterial metabolism. The calculated critical depth of about 1 m at which bubbles are most likely to be found in a granular aquifer, coincides with the depth of 0.60 m of an almost stagnant water layer (specific discharge 1 × 10-6 cm sec-1) found at the water table region under natural flow conditions. Bubbles clog pores and therefore reduce the hydraulic conductivity without significantly reducing the volumetric water content. Stagnation at the water table region results since prevailing pressures (in the order of 10-1 atmospheres) are not sufficiently large to move bubbles through porous media in a water environment.

Original languageEnglish
Pages (from-to)295-306
Number of pages12
JournalTransport in Porous Media
Volume4
Issue number3
DOIs
StatePublished - 1 Jun 1989
Externally publishedYes

Keywords

  • Gas/air bubbles
  • bacterial activity
  • entrapment
  • hydraulic conductivity
  • phreatic aquifers

ASJC Scopus subject areas

  • Catalysis
  • General Chemical Engineering

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