Hydrology and Land Surface Studies
The dielectric properties of granular media saturated with DNAPL/water mixtures
Article first published online: 11 SEP 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 17, September 2004
How to Cite
2004), The dielectric properties of granular media saturated with DNAPL/water mixtures, Geophys. Res. Lett., 31, L17501, doi:10.1029/2004GL020672., , and (
- Issue published online: 11 SEP 2004
- Article first published online: 11 SEP 2004
- Manuscript Accepted: 9 AUG 2004
- Manuscript Revised: 19 JUL 2004
- Manuscript Received: 3 JUN 2004
 We present the results of five experiments investigating the dielectric properties of granular materials partially saturated with trichloroethylene (TCE), a common dense non-aqueous contaminant. Previous research has investigated the radar signatures of similar solvents in controlled field experiments but no core-scale measurements have verified the appropriate petrophysical model. Broadband dielectric measurements were performed using a time domain reflectometry (TDR) system coupled to a solvent-compatible coaxial transmission line. Two synthetic samples and three natural aquifer samples were fully saturated with water and then subjected to an axial TCE injection until breakthrough was observed. The resulting dielectric measurements show good agreement with the empirical complex refractive index model (CRIM) allowing a reasonable prediction of the radar reflectivities and transmission velocities expected in field surveys targeting pools of similar non-aqueous contaminants.