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Soil Solution Electrical Conductivity Measurements Using Different Dielectric Techniques

Dep. of Water Resources Engineering, Lund Univ., Box 118, 221 00 Lund, Sweden

View larger version (21K): [in a new window]   Fig. 1. The dielectric constant (Ka) measured during the upward infiltration experiment in the Revinge subsoil plotted against water content (). The solid line represents Eq. [4] with parameters according to Table 2.

View larger version (20K): [in a new window]   Fig. 2. Measured bulk electrical conductivity (a) plotted against the dielectric constant (Ka) measured during one drainage experiment in the Odarslöv topsoil with a soil solution electrical conductivity of 2.90 dS m-1. The solid line is the regression line with parameters according to Table 3.

View larger version (27K): [in a new window]   Fig. 3. Time domain reflectometry (TDR) measured bulk electrical conductivity (a) plotted against the a predicted using the TDR measured and Eq. [5] with the best-fit parameters obtained using all soil solution electrical conductivities in the Värpinge subsoil (see Table 4).

View larger version (30K): [in a new window]   Fig. 4. Soil solution electrical conductivity (w) plotted against the dielectric constant (Ka) measured during one of the drainage experiment in the Revinge topsoil using Sigma probe (SP) and time domain reflectometry (TDR). The average w measured in the extracted water was 3.00 dS m-1 in this experiment.