Evaluation of measuring precision of field-type dielectric soil moisture probes using salty sand.
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概要
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It is important to measure soil water content and salinity in space and time for the soil management of salty cultivated land. The measuring precision of some field-type dielectric soil moisture probes based on (1) electromagnetic wave, (2) resonance phenomenon, (3) complex dielectric constant, (4) time-domain reflectometry and (5) amplitude domain reflectometry was evaluated using salty sand. The influence of salt concentration on the measurement of soil water content was discussed. A field-type dielectric soil moisture probe with four parallel rods based on amplitude domain reflectometry had the measuring precision within ±0.01cm3/cm3 and ±0.02cm3/cm3 in the low and high water range, respectively. The gauge had small influence of salt concentration on moisture measurement compared with other soil moisture gauges in the range 0 to 30000ppm of NaCl solution.
- 水文・水資源学会の論文
水文・水資源学会 | 論文
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