GeoMeasurements by Pulsing TDR Cables and Probes
GeoMeasurements by Pulsing TDR Cables and Probes examines Time Domain Reflectometry (TDR) research and provides information on its use as a robust, reliable, and economical production tool.
Common uses for TDR technology include telecommunications and power industries, but the text examines applications such as measurement of moisture of unsaturated soils; detection of fluids for leak and pollution; measurement of water levels for hydrological purposes; measurement of water pressures beneath dams; and deformation and stability monitoring of mines, slopes, and structures.
The diverse interest and terminology within the TDR community tends to obscure commonalities and the universal physical principles underlying the technology. The authors seek to crystallize the basic principles among the seemingly divergent specialties using TDR technology in geomaterials. By examining varied experiences, GeoMeasurements by Pulsing TDR Cables and Probes provides a synergistic text necessary to unify the field.
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MONITORING SOIL MOISTURE
FIELD EXPERIENCE AND VERIFICA TION
Nuclear Density Moisture Gauge
MONITORING LOCALIZED DEFORMA TION
Resolution and Attenuation
FIELD EXPERIENCE AND VERIFICATION
Comparison with Elastic Beam Theory
List of Symbols
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air-dielectric aluminum amplitude attenuation backfill balun borehole Bureau of Mines cable deformation cable tester Cablewave calibration changes chapter clay coal coaxial cable CommScope conductivity crimp data blocks datalogger density depth detect developed diameter dielectric constant diode distance Domain Reflectometry Dowding electrical Equation Evanston FAX email field frequency grout hole Illinois inclinometer installed interface length Mining Applications moisture content movement multiplexer neutron probe NTIS NUTSA O'Connor optical fiber OTDR outer conductor pavement piezometers Publication SP 19-94 pulse reference crimps reflection coefficient Reflectometry in Environmental rods samples sensitivity Sensors shear deformation shear displacement shear zone shown in Figure slope soil moisture Soil Water Content Special Publication SP Symposium Table TDR cable TDR measurement TDR monitoring TDR probes TDR reflection magnitude TDR system TDR technology TDR waveforms technique Tektronix Topp transducer cable transmission line U.S. Bureau vertical voltage water content water level Zegelin