Effect of Cable Length on Time Domain Reflectometry Calibration for High Surface Area Soils

@inproceedings{Logsdon2000EffectOC,
  title={Effect of Cable Length on Time Domain Reflectometry Calibration for High Surface Area Soils},
  author={Sally D. Logsdon},
  year={2000}
}
Time domain reflectometry (TDR) has been used by soil scientists to determine soil water content (θ). A waveform analysis determines an apparent dielectric number (e α ) which can often be empirically related to e. Bound water near colloid surfaces has different properties than free water. At the gigahertz frequencies used for TDR, free water has a negative temperature effect but bound water has a positive temperature effect on dielectric number. Long coaxial cables reduce the higher… CONTINUE READING

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