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Main Title A model of virus transport in unsaturated soil.
Author Yates, M. V. ; Ouyang, Y.
Other Authors
Author Title of a Work
Yates, S. R.
Ouyang, Y.
CORP Author Agricultural Research Service, Riverside, CA. Salinity Lab. ;California Univ., Riverside. Dept. of Soil and Environmental Sciences.;Robert S. Kerr Environmental Research Lab., Ada, OK. Processes and Systems Research Div.
Year Published 1992
Report Number EPA 600/2-91-062
Stock Number PB92-119957
OCLC Number 26393652
Additional Subjects Viruses ; Soil microorganisms ; Land pollution ; Environmental transport ; Water pollution control ; Mathematical models ; Zone of aeration ; Unsaturated flow ; Path of pollutants ; Porous media ; Disinfection ; Disease outbreaks ; Ground water ; Potable water ; Water supply ; Soil temperature ; VIRTUS model
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD  EPA 600-2-91-062 AWBERC Library/Cincinnati,OH 12/18/1998
EMBD  EPA/600/2-91/062 NRMRL/GWERD Library/Ada,OK 12/24/1992
NTIS  PB92-119957 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation ix, 137 p.
As a result of the recently-proposed mandatory ground-water disinfection requirements to inactivate viruses in potable water supplies, there has been increasing interest in virus fate and transport in the subsurface. Several models have been developed to predict the fate of viruses in ground water, but few include transport in the unsaturated zone, and all require a constant virus inactivation rate. These are serious limitations in the models, as it has been shown that considerable virus removal occurs in the unsaturated zone, and inactivation rate of viruses is dependent on environmental conditions. The purpose of the research was to develop a predictive model of virus fate and transport in unsaturated soils that allows the virus inactivation rate to vary based on changes in soil temperature. The model was developed based on the law of mass conservation of a contaminant in porous media and couples the flow of water, viruses, and heat through the soil. Model predictions were compared to measured data of virus transport in laboratory column studies, and were within the 95% confidence limits of the measured concentrations. Model simulations were performed to identify variables that have a large effect on the results.
EPA/600/2-91/062. PB92-119957. December 1991.