Improved Measurement of Soil Moisture and Groundwater Level Using Ultrasonic Waves

元データ 2011-07-25

概要

Field monitoring of soil moisture and groundwater levels is one of the countermeasures against slope failure caused by heavy rainfall. We developed a new monitoring method for soil moisture and groundwater level using ultrasonic waves. An ultrasonic detector in this measuring method is easily installed underground and at low cost, and therefore, this method is useful for multipoint monitoring in a wide field area. However, since the measurement data are greatly influenced by temperature, this temperature-dependent effect must be corrected. Previously, the dummy pair system using two detectors had solved this problem. In this paper, we propose another improved temperature correction method using one detector and evaluate the usefulness of both methods in detail.

著者

SAKO KAZUNARI Ritsumeikan University
Fukagawa Ryoichi Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
Tanaka Katsuhiko Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
Suda Takefumi Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
Hirai Kazuhiro Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
Hiraoka Nobutaka Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
Shimamura Makoto Disaster Prevention Research Laboratory, East Japan Railway Company, Saitama 331-8513, Japan
Togari Asako Disaster Prevention Research Laboratory, East Japan Railway Company, Saitama 331-8513, Japan
Tanaka Katsuhiko Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
Sako Kazunari Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan

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