title: Evaluation of vertical variations in hydraulic conductivity in unconsolidated sediments.
abstract: Detailed information on vertical variations in hydraulic conductivity (K) is essential to describe the dynamics of groundwater movement at contaminated sites or as input data used for modeling. K values in high vertical resolution should be determined because K tends to be more continuous in the horizontal than in the vertical direction. To determine K in shallow unconsolidated sediments and in the vertical direction, the recently developed direct-push injection logger can be used. The information obtained by this method serves as a proxy for K and has to be calibrated to obtain quantitative K values of measured vertical profiles. In this study, we performed direct-push soil sampling, sieve analyses and direct-push slug tests to obtain K values in vertical high resolution. Using the results of direct-push slug tests, quantitative K values obtained by the direct-push injection logger could be determined successfully. The results of sieve analyses provided lower accordance with the logs due to the inherent limitations of the sieving method.
authors: Department of Monitoring and Exploration Technologies, Helmholtz Centre for Environmental Research, UFZ, Permoserstraße 15, Leipzig, Germany. Michael.Dietze@tu-dresden.de
authors: Michael
authors: M
authors: Dietze
authors: Peter
authors: P
authors: Dietrich
mesh_terms: D002138:Calibration; D019015:Geologic Sediments / Q000737:chemistry*; D060587:Groundwater; D014872:Water Movements