Abstract: Application of Time Domain Transmissiometry to Coupled Measurements of Soil Moisture and Electrical Conductivity. (ASA, CSSA and SSSA International Annual Meetings)

143-2 Application of Time Domain Transmissiometry to Coupled Measurements of Soil Moisture and Electrical Conductivity.

Poster Number 2404

Monday, November 4, 2013

Tampa Convention Center, East Exhibit Hall

Hideki Miyamoto, Faculty of Agriculture, Saga University, Saga, JAPAN, Naoki Ito, Ube National College of Technology, Ube city, Japan, Atsushi Mase, Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga city, Japan, Ieyasu Tokumoto, Saga University, Saga, Saga, JAPAN, Hiroyuki Cho, Saga University, Saga, Japan and Jiro Chikushi, Biotron Institute, Kyushu University, Fukuoka city, Japan

Abstract:

Time domain transmissiometry (TDT), a method of measuring transmitted broadband signal in microwave frequency, was used to measure volumetric water contents (Θ) and liquid-phase electrical conductivities (σ_w) in sand. The Θ and σ_w were determined independently with travel time and amplitude of impulse-signal transmission, although the determination of both Θ and σ_w with high-moistened saline sand (Θ ≥ 0.32 m³ m^-3 for σ_w = 1.19 S m^-1) was difficult due to the loss of transmitted signals. Judging from the versatility and the simpleness of signal analyses, we believe that the TDT technique would be a more convenient method than time domain reflectometry (TDR) to monitor Θ and σ_w in soils.

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