Accession Number : ADA254754


Title :   Characterization of Heterogenelities Controlling Transport and Fate of Pollutants in UnConsolidated Sand and Gravel Aquifers. First Year Report


Descriptive Note : Annual technical rept. 1 Jun 1991-31 May 1992,


Corporate Author : KANSAS UNIV LAWRENCE DEPT OF GEOLOGY


Personal Author(s) : McElwee, Carl D ; Butler, James J , Jr


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254754.pdf


Report Date : 29 Jun 1992


Pagination or Media Count : 212


Abstract : The purpose of this project is to evaluate promising methodologies for characterization of heterogeneities in hydraulic conductivity. A major thrust of the first year of this project was an assessment of slug tests in heterogeneous formations. The theoretical components of this effort included the development of a time-continuous numerical model, a study of slug tests in layered aquifers, an examination of effective properties obtained from slug tests in the presence of well skins, and an examination of slug tests with observation wells. The field component emphasized multilevel slug tests. A prototype multilevel slug-test system was tested. Test results indicated that the tests are being affected by mechanisms not accounted for in the conventional theory. A series of experiments were carried out in order to clarify the mechanisms producing the observed behavior. These experiments served as the basis for the development of a new nonlinear model for the analysis of slug-test data. Additional field work included further hydraulic testing; a detailed aqueous geochemistry study; drilling and sampling activities; modification of the bladder sampler; laboratory analyses of cores; and a detailed seismic survey.


Descriptors :   *AQUIFERS , *SAMPLING , *POLLUTANTS , *GEOCHEMISTRY , TEST AND EVALUATION , CORES , MODELS , CONDUCTIVITY , THEORY , BEHAVIOR , DRILLING , SAMPLERS , HYDRAULICS , LABORATORIES , TRANSPORT , SURVEYS , SITES , PROTOTYPES , GRAVEL , SAND


Subject Categories : Geology, Geochemistry and Mineralogy
      Water Pollution and Control


Distribution Statement : APPROVED FOR PUBLIC RELEASE