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Collaborating Authors
Results
Direct Detection of Hydrocarbon Contaminants Using the Induced-Polarization Method
Towle, James N. (Phoenix Geophysics, Inc.) | Anderson, Robert G. (Phoenix Geophysics, Inc.) | Pelton, William H. (Phoenix Geophysics, Inc.) | Olhoeft, Gary R. (U.S. Geological Survey) | LaBrecque, Douglas (Lockheed-EMSCO Environmental Program)
The weight of the vibrator is supported by rubber cushion of sand and silt, and underlain by a continuous clay-rich alluvium. For the lower frequencies, the conventional vibrator and pad that simulates a wheel load are used. Lateral profiling with the EM3 I and EM34 terrain conductivity It was found that if the transducers are located at & 0.5 x from meter was conducted atop the dike. Nazarian and Stokoe have been using the source but generally less than 9 m. Apparent terrain conductivity is extremely placed at 5 1.5 X.
The weight of the vibrator is supported by rubber cushion of sand and silt, and underlain by a continuous clay-rich alluvium. For the lower frequencies, the conventional vibrator and pad that simulates a wheel load are used. Lateral profiling with the EM3 I and EM34 terrain conductivity It was found that if the transducers are located at & 0.5 x from meter was conducted atop the dike. Nazarian and Stokoe have been using the source but generally less than 9 m. Apparent terrain conductivity is extremely placed at 5 1.5 X.
Spectral Analysis of Surface Waves In Pavement Systems With Random Noise Excitation
Drnevich, Vincent P. (Univ. of Kentucky) | Kim, Soo-Il (Yonsei Univ., South Korea) | Alexander, Don R. (U.S. Army Engineer Waterways Experiment Station) | Kohn, Starr D. (U.S. Army Engineer Waterways Experiment Station)
The analysis and design of pavement systems is becoming increasingly The second phase of geophysical surveying consisted of conducting dependent on the elastic moduli of the pavement materials, seismic refraction fan spreads in areas in which no drilling base materials, and the subgrade. Techniques which accurately had taken place. Sixteen additional spreads were shot covering and inexpensively can determine these characteristics on that portion of the highway corridor where subsurface voids existing pavement systems are very much in demand.