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Abstract

Accurate information is needed about the hydrogeologic properties at the Department of Energy<br>Hanford site in southeastern Washington. This information is required in order to model the fate and<br>transport of subsurface contaminants. Ground penetrating radar (GPR) data were collected in two areas<br>at Hanford to assess the potential usefulness of GPR for site characterization. The sediments at Hanford<br>are such that we found the penetration depth of the radar measurement to be limited to approximately 10<br>m, in most locations, when using 100 MHz antennas. This means that GPR can only be used to obtain<br>information about the sediments in the top of the vadose zone.<br>One survey objective involved the use of GPR to locate clastic dikes, which can have a large<br>impact on contaminant transport. The dikes were clearly imaged as diffraction hyperbolae in the GPR<br>data. The second objective was to test the use of GPR to describe the spatial variability in water content.<br>Geostatistical analysis of GPR data from a test site yielded a correlation length comparable to that<br>obtained from analysis of neutron probe data from the site. This result suggests that GPR data can be<br>used to quantify the subsurface distribution in water content at Hanford.

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/content/papers/10.3997/2214-4609-pdb.190.con06
2003-04-06
2024-03-28
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