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Measurement of soil water content below a wastewater trench using ground‐penetrating radar
Author(s) -
Parkin G.,
Redman D.,
Bertoldi P.,
Zhang Z.
Publication year - 2000
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/2000wr900129
Subject(s) - trench , ground penetrating radar , geology , reflectometry , water content , radar , soil science , remote sensing , hydrology (agriculture) , geotechnical engineering , time domain , materials science , engineering , telecommunications , layer (electronics) , computer science , composite material , computer vision
Ground‐penetrating radar (GPR) was used to measure the distribution of soil water content below a wastewater trench. Two household septic system trenches were installed in a sandy soil. Vertical time domain reflectometry (TDR) probes were installed through the bottom of one of the trenches. The TDR probes were used to measure soil water content for comparison to the GPR data. The GPR measurements were performed in zero‐offset gather (ZOG) and multiple‐offset gather (MOG) survey modes with the antennas in horizontal boreholes located on opposite sides and below the wastewater trench. The ZOG survey mode gave an estimate of the average water content in the horizontal plane below the trench at a prescribed interval along the trench. The MOG survey mode produced a tomographic image of the distribution of soil water content in the same horizontal plane below the trench. A similar range of values of water contents was measured by TDR and GPR methods.