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Determination of Water Content in Unsaturated Flow Experiments Using TDR and Capacitance

by Xiang Xu, Univ of Nevada, Las Vegas, Las Vegas, United States,
R. Boehm, Univ of Nevada, Las Vegas, Las Vegas, United States,
R. Venkatasubramanian, Univ of Nevada, Las Vegas, Las Vegas, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

Electromagnetic techniques have been used for many years for the determination of moisture content in materials. We are adapting two of these techniques to the estimation of moisture in an unsaturated flow experiment. The two are the time domain reflectometry (TDR) and capacitance methods. A primary criterion for our experiments is that these techniques be noninvasive. In this regard, our application has a different requirement than most previous work. Some comparisons and contrasts to earlier applications are made to our requirements. We report here some measurements using the TDR technique noninvasively and speculate about the ability of these techniques to give the required resolution for data acquisition.

Subject Headings: Water content | Unsaturated flow | Data analysis | Flow measurement | Water flow | Porous media | Moisture

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