The effect of water content of the medium (water saturation) on the reflection power and resolution in Georadar measurements

Abstract

In this research, it was directed to the study of the possibility of using the georadaric method in determining the water content of the studied medium. For this purpose, a field model consisting of a sandy medium (white Mazar sand) was built, inside which a group of metal and plastic objects were buried, and a set of gerodaric measurements were carried out over them using the antennas 100, 200 and 500 MHz.

The implemented measurements were accompanied by taking a group of samples from the study site to the laboratory and determining the percentage of its water content in the laboratory.

Received : 12/09/2022

Accepted: 2022/12/07

Copyright:Damascus University- Syria, The authors retain the copyright under a CC BY- NC-SA

After completing the measurements and processing the executed sections, the arrival times of the objects were calculated, and then the values of the dielectric constant, the reflection coefficient and the strength of reflection were calculated, and then the values of the reflection coefficient and the power of reflection were linked with the values of the water content calculated in the laboratory, drawing the graphic curves and deducing the mathematical relationships that link the values d, and the values of water content on the other.

In order to verify the inferred empirical relationships, they were applied and tested on another set of measurements carried out at the same site in different time periods. It was found that the inferred mathematical relationships give values for water content close to the laboratory calculated values for water content.