AIR ENTRAPMENT AND WATER INFILTRATION IN TWO-LAYERED SOIL COLUMN

In this study, investigators demonstrate the difference in water infiltration in vertical columns of homogeneous soil and vertical columns of two-layered soil. Their purpose was to accurately identify the movement of the wetting front under single- and double-layer conditions. Experimental results revealed that air pressure buildup was more pronounced in soil columns of two layers than in soil columns of one homogeneous layer. Water content in the top layer of a closed two-layer column was greater than the corresponding height in a one-layer column. Flow conditions and pressure buildup in the bottom layer retarded the wetting front at the interface until pressure reached a maximum value in the bottom layer. The authors offer an analytical model that predicts the cumulative infiltration into the top layer and the travel time of the wetting front.

Language

  • English

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Filing Info

  • Accession Number: 00667526
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 27 1994 12:00AM