| Autor: |
Sellwood, Stephen M., Healey, John M., Birk, Steffen, Butler Jr., James J. |
| Předmět: |
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| Zdroj: |
Ground Water; Jan/Feb2005, Vol. 43 Issue 1, p19-29, 11p, 1 Black and White Photograph, 1 Diagram, 1 Chart, 6 Graphs |
| Abstrakt: |
Spatial variations in hydraulic conductivity (K) can significantly affect the transport of contaminants in ground water. Conventional field methods, however, rarely provide a description of these variations at the level of detail necessary for reliable transport predictions and effective remediation designs. A direct-push (DP) method, hydrostratigraphic profiling, has been developed to characterize the spatial variability of both electrical conductivity (EC) and hydraulic conductivity in unconsolidated formations in a cost-effective manner. This method couples a dual-rod approach for performing slug tests in DP equipment with high-resolution EC logging. The method was evaluated at an extensively studied site in the Kansas River floodplain. A series of profiles was performed on a surface grid, resulting in a detailed depiction of the three-dimensional distribution of EC and K. Good agreement was found between K estimates obtained from this approach and those obtained using other methods. The results of the field evaluation indicate that DP hydrostratigraphic profiling is a promising method for obtaining detailed information about spatial variations in subsurface properties without the need for permanent wells. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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