Title :
Determination of volumetric water content in lossy geophysical media using time domain reflectometry
Author :
Oswald, B. ; Benedickter, H.R. ; Bachtold, W. ; Fluhler, H. ; Marschall, P.
Author_Institution :
Lab. for Electromagn. Fields & Microwave Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
We report the application of the time domain reflectometry (TDR) approach for the determination of the volumetric water content /spl theta/ in geophysical media with high dielectrical losses, such as bentonite. Until now, this method has been considered infeasible for this type of material. A new type of probe has been designed with which different values of the volumetric water content can clearly be discriminated by different travel times of the signals on the TDR probes. This has been verified both by experiment and theory.
Keywords :
UHF measurement; hydrological techniques; rocks; time-domain reflectometry; 1.5 GHz; bentonite; geophysical media; lossy geophysical media; probe; time domain reflectometry; travel times; volumetric water content; Time domain reflectometry;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.631831
