ATTENTION: The software behind KU ScholarWorks is being upgraded to a new version. Starting July 15th, users will not be able to log in to the system, add items, nor make any changes until the new version is in place at the end of July. Searching for articles and opening files will continue to work while the system is being updated. If you have any questions, please contact Marianne Reed at .

Show simple item record

dc.contributor.authorLiu, Gaisheng
dc.contributor.authorBohling, Geoffrey C.
dc.contributor.authorButler, James J., Jr.
dc.identifier.citationLiu, Gaisheng, Geoffrey C. Bohling, and James J. Butler. "Simulation Assessment of the Direct-push Permeameter for Characterizing Vertical Variations in Hydraulic Conductivity." Water Resources Research Water Resour. Res. 44.2 (2008): n. pag. DOI:10.1029/2007WR006078en_US
dc.descriptionThis is the published version. Copyright American Geophysical Unionen_US
dc.description.abstract[1] The direct-push permeameter (DPP) is a tool for the in situ characterization of hydraulic conductivity (K) in shallow, unconsolidated formations. This device, which consists of a short screened section with a pair of pressure transducers near the screen, is advanced into the subsurface with direct-push technology. K is determined through a series of injection tests conducted between advancements. Recent field work by Butler et al. (2007) has shown that the DPP holds great potential for describing vertical variations in K at an unprecedented level of detail, accuracy and speed. In this paper, the fundamental efficacy of the DPP is evaluated through a series of numerical simulations. These simulations demonstrate that the DPP can provide accurate K information under conditions commonly faced in the field. A single DPP test provides an effective K for the domain immediately surrounding the interval between the injection screen and the most distant pressure transducer. Features that are thinner than that interval can be quantified by reducing the vertical distance between successive tests and analyzing the data from all tests simultaneously. A particular advantage of the DPP is that, unlike most other single borehole techniques, a low-K skin or a clogged screen has a minimal impact on the K estimate. In addition, the requirement that only steady-shape conditions be attained allows for a dramatic reduction in the time required for each injection test.en_US
dc.publisherAmerican Geophysical Unionen_US
dc.titleSimulation assessment of the direct-push permeameter for characterizing vertical variations in hydraulic conductivityen_US
kusw.kuauthorButler, James. J. Jr.
kusw.kudepartmentKansas Geological Surveyen_US
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item does not meet KU Open Access policy criteria.

Files in this item


This item appears in the following Collection(s)

Show simple item record