A compatible software with Tektronics 1502C Metallic and TDR-100 Campbell Sci. TDR Cable Testers for soil volumetric water content and soil bulk electrical conductivity measurements
David Moret-Fernández, José Vicente, Francisco Lera, and Broja Latorre Garcés
Time Domain Reflectometry (TDR) is a useful technique that allows real time and simultaneous estimation of the apparent permittivity (εa), which is related to the volumetric soil water content (θ), and the soil bulk electrical conductivity (σa).
The TDR Lab V 1.0 allows estimation of θ and σa by using different TDR waveform analysis, has a user friendly graphical interface, can be connected to two different TDR cable testers (Tektronixs 1502C and TDR100 Campbell), and allows automated scheduling readings and analysis of TDR waveform. Four different methods of TDR waveform analysis for water content estimation have been included: (i) a manual method; (ii) the graphical “tangent method”; (iii) the derivative TDR waveform method; and (iv) a numerical modelling of the TDR signal, which estimates θ by inverse analysis of the TDR waveforms. The new software also includes estimation of σa either by graphical analysis or numerical modelling of the TDR signal.
TDR-Lab V 1.0 (2010) |
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TDR-Lab V 2.0 (2016) |