Record Display for the EPA National Library Catalog


Main Title Method of Estimating the Travel Time of Noninteracting Solutes through Compacted Soil Material.
Author Horton, R. ; Thompson, M. L. ; McBride, J. F. ;
CORP Author Iowa State Univ., Ames. Dept. of Agronomy.;Environmental Protection Agency, Cincinnati, OH. Hazardous Waste Engineering Research Lab.
Year Published 1987
Report Number EPA-R-811093; EPA/600/J-87/152;
Stock Number PB88-153879
Additional Subjects Clay soils ; Soil compacting ; Solutes ; Water pollution ; Mathematical models ; Travel time ; Hydraulic conductivity ; Estimates ; Porosity ; Permeability ; Density(Mass/volume) ; Earth fills ; Fluid flow ; Measurement ; Comparison ; Porosimeters ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB88-153879 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
The pollutant travel time through compacted soil material (i.e., when a pollutant introduced at the top first appears at the bottom) cannot be accurately predicted from the permeability (saturated hydraulic conductivity) alone. The travel time is also dependent on the effective porosity of the material; i.e., the portion of the total porosity that contributes significantly to fluid flow. Pollutant travel time is directly proportional to effective porosity and thickness of a compacted layer and inversely proportional to permeability and hydraulic gradient. The total porosity is calculated from measurements of bulk and particle density. Pore size distribution information is obtained from the cumulative porosity curve of the sample as measured by mercury-intrusion porosimeter. The paper also compares measured and predicted solute breakthrough times for three compacted soil materials.