COUPLED SALT AND WATER FLOWS IN A GROUNDWATER BASIN

THE POSTULATES OF IRREVERSIBLE THERMODYNAMICS AND THE LAW OF CONSERVATION OF MASS WERE COMBINED TO YIELD TWO SIMULTANEOUS PARTIAL DIFFERENTIAL EQUATIONS DESCRIBING THE SIMULTANEOUS TRANSIENT-STATE FLOW OF SALT AND WATER IN FINE-GRAINED SEDIMENTS. THE RESULTING EQUATIONS HAVE BEEN USED TO ANALYZE THE MOVEMENTS OF GROUNDWATER AND SALT IN A SUBTERRANEAN AQUITARD IN THE OXNARD, CALIFORNIA, BASIN, A MULTIPLE AQUIFER SYSTEM, WHICH HAS BEEN SUBJECTED TO LATERAL SEAWATER INVASION OF AN UPPER AQUIFER. CHEMICO-OSMOTIC COUPLING MAY INDUCE A SMALL CHEMICO-OSMOTIC CONSOLIDATION OF THE AQUITARD (0.3 MM) OVER A PERIOD OF ABOUT 25 YEARS, BUT THE AQUITARD SHOULD ACT AS AN EFFECTIVE POLLUTION BARRIER TO THE MOVEMENT OF NACL INTO A FRESHWATER AQUIFER BELOW. THE 'TIGHTNESS' OF THE AQUITARD TO SALT MOVEMENT DEPENDS MAINLY ON AQUITARD THICKNESS, HYDRAULIC PERMEABILITY, AND DRAWDOWN IN OVERLYING AND UNDERLYING AQUIFERS.

  • Authors:
    • Greenberg, J A
    • Mitchell, J K
    • Witherspoon, P A
  • Publication Date: 1973-9-20

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 6341-53
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00238172
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 27 1974 12:00AM