DIFFERENTIAL EVAPO-TRANSPIRATION FROM A CLAY SURFACE AND ITS INFLUENCE ON EQUILIBRIUM POREWATER PRESSURE

The derivation is presented of expressions resulting from a steady state groundwater flow approach to determining the porewater pressure changes caused by modification of the rate of evapo-transpiration over limited areas of the ground surface. Solutions to the expressions have been computed for positions throughout the soil layer for a variety of shapes and sizes of affected area. The tabulated results may be used to estimate the effects for a wide range of conditions by making use of the principle of superposition. Case histories are presented in which observations of porewater pressure changes and of ground movement are compared with values derived from the tabulated results. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00168505
• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • Gibson, R E
  • Goldsworthy, M H
  • Chandler, A M
• Publication Date: 1985-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 181-191
• Serial:
  • GEOTECHNIQUE
  • Volume: 35
  • Issue Number: 2
  • Publisher: Thomas Telford Limited
  • ISSN: 0016-8505

Subject/Index Terms

• TRT Terms: Clay; Equilibrium (Mechanics); Evaporation; Evapotranspiration; Flow; Groundwater; Mathematical models; Pore water pressures; Soils; Surfaces; Swelling soils
• ITRD Terms: 4177: Clay; 7183: Evaporation; 4383: Ground water; 6473: Mathematical model; 5762: Pore water pressure; 4156: Soil; 6438: Surface; 5203: Swelling (soil)
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00451050
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Aug 27 2004 9:57PM