WATER EQUILIBRIUM AND MOVEMENTS IN SOIL

EQUILIBRE ET MOUVEMENT DE L[EAU DANS LES SOLS

This report summarizes assumptions and examines the validity of elementary laws governing water movements in soil (Laws of Darcy, Poiseuille, Laplace, Jourin, Kelvin). Suction is defined and its main characteristics recalled, together with the coventional and new methods of representing the multivocal relation between suction and one of the parameters expressing the soil moisture content. The thermodynamic bases of the concept of suction and their similarity with Gibbs free energy are demonstrated. Two main approaches are used to study the equations governing the movement of water in the soil? the first is based on the Laplace law generalised for non-saturated systems, the second on the thermodynamics of irreversible processes. For each case general equations are derived and discussed. Parallel to theoretical equiations, there exist some empirical methods, which are also studied and discussed. Various apparatus for measuring suction are mentioned, and their field of application is outlined. The last chapter deals with electro-osmosis. ;TRRL;

  • Corporate Authors:

    Road Research Centre, Belgium

    Avenue d'Auderghem 49
    Brussels,   Belgium 
  • Authors:
    • Verbrugge, J C
  • Publication Date: 1972-8

Language

  • French

Media Info

  • Features: Figures; References;
  • Pagination: 112 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00125671
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: 159;JCV R&D Rept.
  • Files: ITRD, TRIS
  • Created Date: May 14 1976 12:00AM