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Please use this identifier to cite or link to this item: http://hdl.handle.net/1993/2742

Title: Evaluation of the performance of soil moisture sensors in laboratory-scale lysimeters
Authors: Proulx, Sophie
Issue Date: 1-Aug-2001
Abstract: Soil moisture sensors were evaluated in laboratory-scale lysimeters. The performances of tensiometers, granular matrix sensors (GMS), capacitance sensors, phase transmission sensors, and of a portable capacitance probe and a frequency-domain reflectometry (FDR) sensor was observed in loam (31.5% sand, 45.2% silt, and 23.1% clay) and silt loam (20% sand, 54% silt, and 26% clay) of the Ramada Series. The experiment was conducted over two drying cycles in loam for moisture contents decreasing from 34.0 to 17.0% by volume for the 1999 trial and decreasing from 43.1 to 20.0% by volume for the 2000 trial and over a single drying cycle in silt loam for moisture decreasing from 45.8 to 19.5% by volume. The lysimeters were designed with hydraulic weighing systems to facilitate continuous monitoring of the soil moisture content. A conversion equation was developed, based on texture-specific calibration curves published by the manufacturer, to calibrate the readings of the Aqua-Tel sensors. The procedure followed for converting the readings of the Aquaterr probe was also partially developed by the experimenter to obtain more accuracy. (Abstract shortened by UMI.)
URI: http://hdl.handle.net/1993/2742
Appears in Collection(s):FGS - Electronic Theses & Dissertations (Public)

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