Record Display for the EPA National Library Catalog

RECORD NUMBER: 9 OF 38

OLS Field Name OLS Field Data
Main Title Evaluation of Hydraulic Conductivities Calculated from Multiport-Permeameter Measurements.
Author Wolf, S. H. ; Celia, M. A. ; Hess, K. M. ;
CORP Author ENSR, Acton, MA. ;Princeton Univ., NJ. Dept. of Civil Engineering. ;Geological Survey, Marlborough, MA.;Robert S. Kerr Environmental Research Lab., Ada, OK.;Massachusetts Inst. of Tech., Cambridge.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-92/029;
Stock Number PB92-144013
Additional Subjects Aquifers ; Permeameters ; Hydraulic conductivity ; Hydrogeology ; Ground water ; Flow measurement ; Permeability ; Flowmeters ; Boreholes ; Radiography ; Mathematical models ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB92-144013 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/28/1992
Collation 13p
Abstract
A multiport permeameter was developed for use in estimating hydraulic conductivity over intact sections of aquifer core using the core liner as the permeameter body. Six cores obtained from one borehole through the upper 9 m of a stratified glacial-outwash aquifer were used to evaluate the reliability of the permeameter. Radiographs of the cores were used to assess core integrity and to locate 5- to 10-cm sections of similar grain size for estimation of hydraulic conductivity. After extensive testing of the permeameter, hydraulic conductivities were determined for 83 sections of the six cores. Other measurement techniques included permeameter measurements on repacked sections of core, estimates based on grain-size analyses, and estimates based on borehole flowmeter measurements. Hydraulic conductivities calculated from field measurements, using a borehole flowmeter in the borehole from which the cores were extracted, were significantly higher than those calculated from laboratory measurements and more closely agreed with independent estimates of hydraulic conductivity based on tracer movement near the borehole. This indicates that hydraulic conductivities based on laboratory measurements of core samples may underestimate actual field hydraulic conductivities in this type of stratified glacial-outwash aquifer.