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Soil Science Society of America Journal Abstract -

Water Intake by a Water-Filled Plexiglas Permeameter Cell1


This article in SSSAJ

  1. Vol. 41 No. 3, p. 662-664
    Received: Aug 16, 1976
    Accepted: Nov 18, 1976

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  1. G. Y. Tsuji and
  2. D. Swartzendruber2



Water entry into a Plexiglas (acrylic plastic) permeameter cell was measured by the recession of water in capillary standpipes connected to the water-filled cell. Submergence of the permeameter in water demonstrated that the water entry was not caused primarily by a slight leak in the permeameter or by water-vapor diffusion through its walls. Also, the rate was essentially unaffected when the permeameter contained a water-saturated mixture of sand, silt, and bentonite. Calculations for the permeameter in air indicated the observed intake rate to be 20 times that attributable to water-vapor diffusion through the Plexiglas walls, and 1/8 that attributable to direct water absorption as obtained from a maximal handbook value. Hence, it appears that direct absorption by the Plexiglas is the likely cause of water entry into the permeameter.

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