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EVALUATION OF METHOD FOR DETERMINING THE VERTICAL DISTRIBUTION OF HYDRAULIC CONDUCTIVITY
Citation:
Taylor, K., S. Wheatcraft, J. Hess, J. Hayworth, AND F. Mulz. EVALUATION OF METHOD FOR DETERMINING THE VERTICAL DISTRIBUTION OF HYDRAULIC CONDUCTIVITY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/298 (NTIS PB91146522), 1990.
Description:
Six borehole methods for determining the vertical distribution of hydraulic conductivity in unconsolidated geologic formations are evaluated. taddle packer tests are inappropriate of 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. ethods 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. toneley wave attenuation methods are not effective in unconsolidated formations. ingle-well electrical tracer test is effective, but requires the injection of significant volumes of fluid.
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EVALUATION OF METHOD FOR DETERMINING THE VERTICAL DISTRIBUTION OF HYDRAULIC CONDUCTIVITY