PERMEABILITY OF ANISOTROPIC POROUS MEDIA

THE GENERAL EQUATIONS FOR TWO-DIMENSIONAL DARCIAN FLOW THROUGH SATURATED, HOMOGENEOUS, ANISOTROPIC POROUS MEDIA ARE DERIVED, DISCUSSED, AND ILLUSTRATED GRAPHICALLY. IN GENERAL, THE DIRECTION OF THE FLOW LINE AND THE GRADIENT AT A POINT ARE NOT COINCIDENT FOR SUCH FLOW CONDITIONS, AND TWO DIFFERENT DEFINITIONS ARE POSSIBLE FOR THE PERMEABILITY IN ANY ARBITRARY DIRECTION. THESE TWO DEFINITIONS DO NOT YIELD THE SAME RESULT, AND THE DIFFERENCE MAY BE QUITE SUBSTANTIAL, DEPENDING ON THE DEGREE OF ANISOTROPY AND THE DIRECTION CONSIDERED. PHYSICALLY, THESE TWO VALUES ARE THE EXTREMES ASSOCIATED WITH A GIVEN DIRECTION, SINCE THE LABORATORY-MEASURED PERMEABILITY IN THIS SAME DIRECTION DEPENDS ON THE BOUNDARY CONDITIONS OF THE SPECIMEN, AN INTERMEDIATE DIRECTIONAL PERMEABILITY VALUE IS USUALLY OBTAINED AND THE USE OF THIS VALUE IN THE SOLUTION OF SEEPAGE PROBLEMS IS SOMEWHAT RESTRICTED. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 72-81
  • Monograph Title: Embankment analysis, settlement, and seepage
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00235301
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 5 1994 12:00AM