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RECORD NUMBER: 20 OF 39

OLS Field Name OLS Field Data
Main Title Natural Gradient Experiment on Solute Transport in a Sand Aquifer: Spatial Variability of Hydraulic Conductivity and Its Role in the Dispersion Process.
Author Sudicky, E. A. ;
CORP Author Waterloo Univ. (Ontario). Inst. for Ground Water Research.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1986
Report Number EPA/600/J-86/327;
Stock Number PB87-176657
Additional Subjects Aquifers ; Sand filters ; Hydraulic conductivity ; Solutes ; Transport properties ; Dispersing ; Ground water ; Water pollution ; Gradients ; Reprints ; Foreign technology ; Tracer studies
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB87-176657 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 16p
Abstract
The spatial variability of hydraulic conductivity at the site of a long-term tracer test performed in the Borden aquifer was examined in great detail by conducting permeability measurements on a series of cores taken along two cross sections. Along the two cross sections, a regular-spaced grid of hydraulic conductivity data revealed that the aquifer is comprised of numerous thin, discontinuous lenses of contrasting hydraulic conductivity. A value for the longitudinal macrodispersivity calculated from statistical parameters using three-dimensional stochastic transport theory developed by L.W. Gelhar and C.L. Axness (1983) is about 0.6 m. For the vertically averaged case, the two-dimensional theory developed by G. Dagan (1982, 1984) yields a longitudinal dispersivity equal to 0.45 m. Use of the estimated statistical parameters describing the 1n (K) variability in Dagan's transient equations closely predicted the observed longitudinal and horizontal transverse spread of the tracer with time. (Copyright (c) 1986 by the American Geophysical Union.)