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RECORD NUMBER: 45 OF 154

OLS Field Name OLS Field Data
Main Title Evaluation of Methods for Determining the Vertical Distribution of Hydraulic Conductivity.
Author Taylor, K. ; Wheatcraft, S. ; Hess, J. ; Hayworth, J. ; Molz, F. ;
CORP Author Nevada Univ. System, Reno. Desert Research Inst. ;Auburn Univ., AL.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher c1990
Year Published 1990
Report Number EPA-R-812713; EPA/600/J-90/298;
Stock Number PB91-146522
Additional Subjects Boreholes ; Hydraulic conductivity ; Ground water ; Contamination ; Formation tests ; Reservoir engineering ; Electrical conductivity ; Well logging ; Well tests ; Electrical prospecting ; Fluid flow ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB91-146522 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/13/1991
Collation 14p
Abstract
Six borehole methods for determining the vertical distribution of hydraulic conductivity in unconsolidated geologic formations are evaluated. Staddle packer tests are inappropriate if there is a hydraulic path around the packer on the outside of the well screen. Methods based on grainsize analysis fail to incorporate the influence of small-scale structure and packing. Methods based on relationships between electrical and hydraulic conductivity require special conditions and are site- and formation-specific. Borehole effects invalidate methods based on the natural flow of fluid through a well bore. Stoneley wave attenuation methods are not effective in unconsolidated formations. A single-well electrical tracer test is effective, but requires the injection of significant volumes of fluid.