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- W1990634412 abstract "The use of cross-borehole ground penetrating radar (GPR) imaging for determining the two dimensional (2D) in situ moisture content distribution within the vadose zone is being investigated. The ultimate goal is to use the GPR images as input to a 2D hydrologic inversion scheme for recovering the van Genuchten parameters governing unsaturated hydraulic flow. Initial experiments conducted on synthetic data have shown that at least in theory, cross-borehole GPR measurements can provide realistic estimates of the spatial variation in moisture content that are needed for this type of hydrologic inversion scheme. However, the method can not recover exact values of moisture content due to 1) the break down of the empirical expression often employed to convert GPR velocity images to moisture content, and 2) the smearing nature of the imaging algorithm. To test the applicability of this method in a real world environment, crossborehole GPR measurements were made at a hydrologic/ geophysical vadose zone test site in Socorro, New Mexico. Results show that the GPR images compare well with the uncalibrated borehole neutron log data. GPR data acquisition will continue once an infiltration test has started, and the results from these measurements will be employed in a 2D hydrologic inverse scheme." @default.
- W1990634412 created "2016-06-24" @default.
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- W1990634412 date "1999-01-01" @default.
- W1990634412 modified "2023-10-18" @default.
- W1990634412 title "An Investigation Of Cross-Borehole Ground Penetrating Radar Measurements For Characterizing The 2D Moisture Content Distribution In The Vadose Zone" @default.
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- W1990634412 doi "https://doi.org/10.3997/2214-4609-pdb.202.1999_065" @default.
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