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Main Title Advection-Dispersion Interpretation of Tracer Observations in an Aquifer.
Author Hoehn, Eduard ; Roberts, Paul V. ;
CORP Author Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1982
Report Number EPA-CR-808851 ;EPA-R-804431; EPA-600/J-82-232;
Stock Number PB83-117077
Additional Subjects Hydrogeology ; Ground water recharge ; Hydraulic models ; Water pollution control ; Aquifers ; Injection wells ; Mathematical models ; Advection ; Dispersing ; Isotopic labeling ; Tritium ; Hydraulic conductivity ; Comparison ; Porosity ; Tables(Data) ; Reprints ; Path of pollutants ; Tracer studies
Library Call Number Additional Info Location Last
NTIS  PB83-117077 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Data from field tracer experiments are interpreted to evaluate the adequacy of an advection-dispersion model for simulating field conditions. A stimulus-response approach based on chemical reactor theory was applied. Two different pulse stimuli at an injection well resulted in responses in two observation wells located at distances of 8 and 17 m, respectively, from the injection well. The wells are perforated over the entire aquifer thickness of 1-2 m. The behavior of the two conservative tracers agreed closely with each other. A two-domain model is employed to extend the simple advection-dispersion equation to account for the observed tailing. Response curves of concentrations were fitted with finite-difference simulations using the two-domain model. The responses at the more distant well were characterized by values of dispersivity equal to or slightly smaller than those at the nearer well.